/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-b8dbc81 [2023-01-28 05:06:46,866 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-01-28 05:06:46,869 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-01-28 05:06:46,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-01-28 05:06:46,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-01-28 05:06:46,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-01-28 05:06:46,897 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-01-28 05:06:46,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-01-28 05:06:46,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-01-28 05:06:46,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-01-28 05:06:46,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-01-28 05:06:46,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-01-28 05:06:46,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-01-28 05:06:46,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-01-28 05:06:46,904 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-01-28 05:06:46,905 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-01-28 05:06:46,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-01-28 05:06:46,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-01-28 05:06:46,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-01-28 05:06:46,909 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-01-28 05:06:46,910 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-01-28 05:06:46,911 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-01-28 05:06:46,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-01-28 05:06:46,913 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-01-28 05:06:46,916 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-01-28 05:06:46,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-01-28 05:06:46,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-01-28 05:06:46,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-01-28 05:06:46,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-01-28 05:06:46,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-01-28 05:06:46,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-01-28 05:06:46,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-01-28 05:06:46,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-01-28 05:06:46,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-01-28 05:06:46,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-01-28 05:06:46,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-01-28 05:06:46,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-01-28 05:06:46,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-01-28 05:06:46,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-01-28 05:06:46,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-01-28 05:06:46,925 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-01-28 05:06:46,930 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-VariableLbe.epf [2023-01-28 05:06:46,958 INFO L113 SettingsManager]: Loading preferences was successful [2023-01-28 05:06:46,959 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-01-28 05:06:46,960 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-01-28 05:06:46,960 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-01-28 05:06:46,961 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-01-28 05:06:46,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-01-28 05:06:46,961 INFO L138 SettingsManager]: * Use SBE=true [2023-01-28 05:06:46,962 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-01-28 05:06:46,962 INFO L138 SettingsManager]: * sizeof long=4 [2023-01-28 05:06:46,962 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-01-28 05:06:46,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-01-28 05:06:46,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-01-28 05:06:46,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-01-28 05:06:46,963 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-01-28 05:06:46,963 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-01-28 05:06:46,963 INFO L138 SettingsManager]: * sizeof long double=12 [2023-01-28 05:06:46,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-01-28 05:06:46,964 INFO L138 SettingsManager]: * Use constant arrays=true [2023-01-28 05:06:46,964 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-01-28 05:06:46,964 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-01-28 05:06:46,964 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-01-28 05:06:46,964 INFO L138 SettingsManager]: * To the following directory=./dump/ [2023-01-28 05:06:46,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-01-28 05:06:46,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 05:06:46,965 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-01-28 05:06:46,965 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-01-28 05:06:46,965 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-01-28 05:06:46,965 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-01-28 05:06:46,965 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-01-28 05:06:46,966 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-01-28 05:06:46,966 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-01-28 05:06:46,966 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-01-28 05:06:47,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-01-28 05:06:47,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-01-28 05:06:47,212 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-01-28 05:06:47,213 INFO L271 PluginConnector]: Initializing CDTParser... [2023-01-28 05:06:47,214 INFO L275 PluginConnector]: CDTParser initialized [2023-01-28 05:06:47,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-01-28 05:06:48,411 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-01-28 05:06:48,613 INFO L351 CDTParser]: Found 1 translation units. [2023-01-28 05:06:48,613 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c [2023-01-28 05:06:48,620 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a6e11c40/17efcb5dec014b02a4f5e9eeb7a6a6bb/FLAGae0003e8e [2023-01-28 05:06:48,642 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a6e11c40/17efcb5dec014b02a4f5e9eeb7a6a6bb [2023-01-28 05:06:48,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-01-28 05:06:48,647 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2023-01-28 05:06:48,648 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-01-28 05:06:48,648 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-01-28 05:06:48,651 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-01-28 05:06:48,652 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,653 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7338aa89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48, skipping insertion in model container [2023-01-28 05:06:48,653 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,658 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-01-28 05:06:48,679 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-01-28 05:06:48,801 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-01-28 05:06:48,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 05:06:48,813 INFO L203 MainTranslator]: Completed pre-run [2023-01-28 05:06:48,830 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-nonblocking-cntr-alt.wvr.c[2098,2111] [2023-01-28 05:06:48,831 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-01-28 05:06:48,838 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 05:06:48,838 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-01-28 05:06:48,845 INFO L208 MainTranslator]: Completed translation [2023-01-28 05:06:48,845 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48 WrapperNode [2023-01-28 05:06:48,845 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-01-28 05:06:48,846 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-01-28 05:06:48,847 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-01-28 05:06:48,847 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-01-28 05:06:48,853 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,875 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 59 [2023-01-28 05:06:48,875 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-01-28 05:06:48,876 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-01-28 05:06:48,876 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-01-28 05:06:48,876 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-01-28 05:06:48,883 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,883 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,895 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-01-28 05:06:48,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-01-28 05:06:48,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-01-28 05:06:48,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-01-28 05:06:48,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (1/1) ... [2023-01-28 05:06:48,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-01-28 05:06:48,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:06:48,927 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) [2023-01-28 05:06:48,929 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 [2023-01-28 05:06:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-01-28 05:06:48,954 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-01-28 05:06:48,955 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-01-28 05:06:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-01-28 05:06:48,955 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-01-28 05:06:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-01-28 05:06:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-01-28 05:06:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-01-28 05:06:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-01-28 05:06:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-01-28 05:06:48,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-01-28 05:06:48,956 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-01-28 05:06:48,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-01-28 05:06:48,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-01-28 05:06:48,957 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-01-28 05:06:49,030 INFO L236 CfgBuilder]: Building ICFG [2023-01-28 05:06:49,031 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-01-28 05:06:49,183 INFO L277 CfgBuilder]: Performing block encoding [2023-01-28 05:06:49,251 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-01-28 05:06:49,252 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-01-28 05:06:49,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 05:06:49 BoogieIcfgContainer [2023-01-28 05:06:49,254 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-01-28 05:06:49,256 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-01-28 05:06:49,256 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-01-28 05:06:49,275 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-01-28 05:06:49,275 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.01 05:06:48" (1/3) ... [2023-01-28 05:06:49,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765775bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 05:06:49, skipping insertion in model container [2023-01-28 05:06:49,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.01 05:06:48" (2/3) ... [2023-01-28 05:06:49,276 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@765775bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.01 05:06:49, skipping insertion in model container [2023-01-28 05:06:49,276 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.01 05:06:49" (3/3) ... [2023-01-28 05:06:49,278 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-nonblocking-cntr-alt.wvr.c [2023-01-28 05:06:49,294 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-01-28 05:06:49,294 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-01-28 05:06:49,294 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-01-28 05:06:49,349 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-01-28 05:06:49,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2023-01-28 05:06:49,419 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2023-01-28 05:06:49,419 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:06:49,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 40 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-01-28 05:06:49,424 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2023-01-28 05:06:49,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2023-01-28 05:06:49,431 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-01-28 05:06:49,438 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2023-01-28 05:06:49,440 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2023-01-28 05:06:49,441 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2023-01-28 05:06:49,463 INFO L130 PetriNetUnfolder]: 6/71 cut-off events. [2023-01-28 05:06:49,463 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:06:49,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 41 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2023-01-28 05:06:49,464 INFO L119 LiptonReduction]: Number of co-enabled transitions 404 [2023-01-28 05:06:51,651 INFO L134 LiptonReduction]: Checked pairs total: 449 [2023-01-28 05:06:51,651 INFO L136 LiptonReduction]: Total number of compositions: 64 [2023-01-28 05:06:51,663 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-01-28 05:06:51,668 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=false, 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;@40f49661, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-01-28 05:06:51,668 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-01-28 05:06:51,672 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-01-28 05:06:51,672 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-01-28 05:06:51,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:06:51,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:06:51,674 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:06:51,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:06:51,678 INFO L85 PathProgramCache]: Analyzing trace with hash -507941003, now seen corresponding path program 1 times [2023-01-28 05:06:51,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:06:51,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281432953] [2023-01-28 05:06:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:06:51,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:06:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:06:52,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:52,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:06:52,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281432953] [2023-01-28 05:06:52,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281432953] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:06:52,096 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:06:52,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 05:06:52,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341429395] [2023-01-28 05:06:52,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:06:52,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 05:06:52,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:06:52,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 05:06:52,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 05:06:52,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 145 [2023-01-28 05:06:52,127 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:52,127 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:06:52,127 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 145 [2023-01-28 05:06:52,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:06:52,189 INFO L130 PetriNetUnfolder]: 54/95 cut-off events. [2023-01-28 05:06:52,190 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2023-01-28 05:06:52,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 95 events. 54/95 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 238 event pairs, 10 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 160. Up to 73 conditions per place. [2023-01-28 05:06:52,192 INFO L137 encePairwiseOnDemand]: 141/145 looper letters, 17 selfloop transitions, 3 changer transitions 0/21 dead transitions. [2023-01-28 05:06:52,192 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 21 transitions, 97 flow [2023-01-28 05:06:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:06:52,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 05:06:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 249 transitions. [2023-01-28 05:06:52,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42931034482758623 [2023-01-28 05:06:52,204 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 249 transitions. [2023-01-28 05:06:52,204 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 249 transitions. [2023-01-28 05:06:52,206 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:06:52,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 249 transitions. [2023-01-28 05:06:52,210 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:52,214 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:52,215 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:52,216 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 4 states and 249 transitions. [2023-01-28 05:06:52,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 21 transitions, 97 flow [2023-01-28 05:06:52,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 19 places, 21 transitions, 87 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-01-28 05:06:52,220 INFO L231 Difference]: Finished difference. Result has 20 places, 16 transitions, 48 flow [2023-01-28 05:06:52,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=48, PETRI_PLACES=20, PETRI_TRANSITIONS=16} [2023-01-28 05:06:52,225 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 0 predicate places. [2023-01-28 05:06:52,225 INFO L495 AbstractCegarLoop]: Abstraction has has 20 places, 16 transitions, 48 flow [2023-01-28 05:06:52,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 60.0) internal successors, (240), 4 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:52,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:06:52,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:06:52,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-01-28 05:06:52,226 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:06:52,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:06:52,227 INFO L85 PathProgramCache]: Analyzing trace with hash -259176130, now seen corresponding path program 1 times [2023-01-28 05:06:52,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:06:52,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904968771] [2023-01-28 05:06:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:06:52,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:06:52,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:06:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:06:52,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:06:52,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904968771] [2023-01-28 05:06:52,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904968771] provided 1 perfect and 0 imperfect interpolant sequences [2023-01-28 05:06:52,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-01-28 05:06:52,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-01-28 05:06:52,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55705907] [2023-01-28 05:06:52,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-01-28 05:06:52,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-01-28 05:06:52,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:06:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-01-28 05:06:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-01-28 05:06:52,345 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 145 [2023-01-28 05:06:52,346 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 16 transitions, 48 flow. Second operand has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:52,346 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:06:52,346 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 145 [2023-01-28 05:06:52,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:06:52,384 INFO L130 PetriNetUnfolder]: 51/93 cut-off events. [2023-01-28 05:06:52,384 INFO L131 PetriNetUnfolder]: For 22/31 co-relation queries the response was YES. [2023-01-28 05:06:52,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 235 conditions, 93 events. 51/93 cut-off events. For 22/31 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 204 event pairs, 24 based on Foata normal form. 9/84 useless extension candidates. Maximal degree in co-relation 154. Up to 73 conditions per place. [2023-01-28 05:06:52,386 INFO L137 encePairwiseOnDemand]: 141/145 looper letters, 19 selfloop transitions, 3 changer transitions 0/23 dead transitions. [2023-01-28 05:06:52,386 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 23 transitions, 114 flow [2023-01-28 05:06:52,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-01-28 05:06:52,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-01-28 05:06:52,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 257 transitions. [2023-01-28 05:06:52,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44310344827586207 [2023-01-28 05:06:52,392 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 257 transitions. [2023-01-28 05:06:52,392 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 257 transitions. [2023-01-28 05:06:52,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:06:52,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 257 transitions. [2023-01-28 05:06:52,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 64.25) internal successors, (257), 4 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:52,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:52,398 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:52,398 INFO L175 Difference]: Start difference. First operand has 20 places, 16 transitions, 48 flow. Second operand 4 states and 257 transitions. [2023-01-28 05:06:52,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 23 transitions, 114 flow [2023-01-28 05:06:52,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 23 transitions, 105 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-01-28 05:06:52,399 INFO L231 Difference]: Finished difference. Result has 22 places, 17 transitions, 56 flow [2023-01-28 05:06:52,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=56, PETRI_PLACES=22, PETRI_TRANSITIONS=17} [2023-01-28 05:06:52,400 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 2 predicate places. [2023-01-28 05:06:52,400 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 17 transitions, 56 flow [2023-01-28 05:06:52,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 62.25) internal successors, (249), 4 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:52,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:06:52,400 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:06:52,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-01-28 05:06:52,401 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:06:52,401 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:06:52,401 INFO L85 PathProgramCache]: Analyzing trace with hash 746860219, now seen corresponding path program 1 times [2023-01-28 05:06:52,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:06:52,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336731830] [2023-01-28 05:06:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:06:52,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:06:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:06:52,728 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:52,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:06:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336731830] [2023-01-28 05:06:52,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336731830] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:06:52,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25281890] [2023-01-28 05:06:52,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:06:52,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:52,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:06:52,736 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) [2023-01-28 05:06:52,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-01-28 05:06:52,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:06:52,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 05:06:52,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:06:53,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:53,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:06:53,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:53,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25281890] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:06:53,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:06:53,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 05:06:53,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584073995] [2023-01-28 05:06:53,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:06:53,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 05:06:53,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:06:53,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 05:06:53,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2023-01-28 05:06:53,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:06:53,366 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 22 places, 17 transitions, 56 flow. Second operand has 20 states, 20 states have (on average 56.9) internal successors, (1138), 20 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:53,366 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:06:53,366 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:06:53,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:06:53,963 INFO L130 PetriNetUnfolder]: 167/315 cut-off events. [2023-01-28 05:06:53,963 INFO L131 PetriNetUnfolder]: For 109/109 co-relation queries the response was YES. [2023-01-28 05:06:53,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 865 conditions, 315 events. 167/315 cut-off events. For 109/109 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1203 event pairs, 5 based on Foata normal form. 3/244 useless extension candidates. Maximal degree in co-relation 238. Up to 109 conditions per place. [2023-01-28 05:06:53,969 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 53 selfloop transitions, 26 changer transitions 39/118 dead transitions. [2023-01-28 05:06:53,969 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 118 transitions, 612 flow [2023-01-28 05:06:53,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-01-28 05:06:53,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-01-28 05:06:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1106 transitions. [2023-01-28 05:06:53,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42375478927203064 [2023-01-28 05:06:53,973 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1106 transitions. [2023-01-28 05:06:53,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1106 transitions. [2023-01-28 05:06:53,974 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:06:53,974 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1106 transitions. [2023-01-28 05:06:53,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.44444444444444) internal successors, (1106), 18 states have internal predecessors, (1106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:53,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:53,983 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 145.0) internal successors, (2755), 19 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:53,984 INFO L175 Difference]: Start difference. First operand has 22 places, 17 transitions, 56 flow. Second operand 18 states and 1106 transitions. [2023-01-28 05:06:53,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 118 transitions, 612 flow [2023-01-28 05:06:53,986 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 118 transitions, 580 flow, removed 8 selfloop flow, removed 2 redundant places. [2023-01-28 05:06:53,988 INFO L231 Difference]: Finished difference. Result has 48 places, 42 transitions, 249 flow [2023-01-28 05:06:53,988 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=20, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=17, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=249, PETRI_PLACES=48, PETRI_TRANSITIONS=42} [2023-01-28 05:06:53,990 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 28 predicate places. [2023-01-28 05:06:53,990 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 42 transitions, 249 flow [2023-01-28 05:06:53,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.9) internal successors, (1138), 20 states have internal predecessors, (1138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:53,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:06:53,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:06:53,999 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-01-28 05:06:54,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:54,196 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:06:54,196 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:06:54,196 INFO L85 PathProgramCache]: Analyzing trace with hash 979621307, now seen corresponding path program 2 times [2023-01-28 05:06:54,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:06:54,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72983213] [2023-01-28 05:06:54,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:06:54,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:06:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:06:54,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:54,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:06:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72983213] [2023-01-28 05:06:54,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72983213] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:06:54,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446625561] [2023-01-28 05:06:54,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:06:54,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:54,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:06:54,430 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) [2023-01-28 05:06:54,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-01-28 05:06:54,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:06:54,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:06:54,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 05:06:54,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:06:54,619 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:54,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:06:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:54,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446625561] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:06:54,846 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:06:54,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 05:06:54,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610322527] [2023-01-28 05:06:54,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:06:54,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 05:06:54,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:06:54,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 05:06:54,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-01-28 05:06:54,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:06:54,852 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 42 transitions, 249 flow. Second operand has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:54,852 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:06:54,853 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:06:54,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:06:56,141 INFO L130 PetriNetUnfolder]: 304/598 cut-off events. [2023-01-28 05:06:56,141 INFO L131 PetriNetUnfolder]: For 1473/1473 co-relation queries the response was YES. [2023-01-28 05:06:56,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2376 conditions, 598 events. 304/598 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 2830 event pairs, 31 based on Foata normal form. 10/604 useless extension candidates. Maximal degree in co-relation 2310. Up to 228 conditions per place. [2023-01-28 05:06:56,146 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 95 selfloop transitions, 40 changer transitions 70/205 dead transitions. [2023-01-28 05:06:56,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 205 transitions, 1461 flow [2023-01-28 05:06:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 05:06:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 05:06:56,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2115 transitions. [2023-01-28 05:06:56,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41674876847290643 [2023-01-28 05:06:56,153 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2115 transitions. [2023-01-28 05:06:56,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2115 transitions. [2023-01-28 05:06:56,154 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:06:56,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2115 transitions. [2023-01-28 05:06:56,159 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 60.42857142857143) internal successors, (2115), 35 states have internal predecessors, (2115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:56,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:56,168 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:56,168 INFO L175 Difference]: Start difference. First operand has 48 places, 42 transitions, 249 flow. Second operand 35 states and 2115 transitions. [2023-01-28 05:06:56,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 205 transitions, 1461 flow [2023-01-28 05:06:56,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 205 transitions, 1286 flow, removed 82 selfloop flow, removed 5 redundant places. [2023-01-28 05:06:56,179 INFO L231 Difference]: Finished difference. Result has 97 places, 74 transitions, 613 flow [2023-01-28 05:06:56,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=211, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=613, PETRI_PLACES=97, PETRI_TRANSITIONS=74} [2023-01-28 05:06:56,180 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 77 predicate places. [2023-01-28 05:06:56,180 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 74 transitions, 613 flow [2023-01-28 05:06:56,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:56,181 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:06:56,181 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:06:56,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-01-28 05:06:56,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-01-28 05:06:56,388 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:06:56,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:06:56,388 INFO L85 PathProgramCache]: Analyzing trace with hash -632437385, now seen corresponding path program 3 times [2023-01-28 05:06:56,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:06:56,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063618710] [2023-01-28 05:06:56,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:06:56,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:06:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:06:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:56,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:06:56,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063618710] [2023-01-28 05:06:56,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063618710] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:06:56,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395011290] [2023-01-28 05:06:56,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:06:56,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:56,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:06:56,602 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) [2023-01-28 05:06:56,625 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-01-28 05:06:56,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 05:06:56,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:06:56,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 05:06:56,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:06:56,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:56,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:06:57,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:57,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395011290] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:06:57,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:06:57,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 05:06:57,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66143431] [2023-01-28 05:06:57,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:06:57,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 05:06:57,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:06:57,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 05:06:57,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-01-28 05:06:57,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:06:57,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 74 transitions, 613 flow. Second operand has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:57,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:06:57,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:06:57,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:06:57,710 INFO L130 PetriNetUnfolder]: 289/582 cut-off events. [2023-01-28 05:06:57,710 INFO L131 PetriNetUnfolder]: For 5801/5801 co-relation queries the response was YES. [2023-01-28 05:06:57,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3053 conditions, 582 events. 289/582 cut-off events. For 5801/5801 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2838 event pairs, 17 based on Foata normal form. 3/585 useless extension candidates. Maximal degree in co-relation 2915. Up to 159 conditions per place. [2023-01-28 05:06:57,715 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 73 selfloop transitions, 50 changer transitions 47/170 dead transitions. [2023-01-28 05:06:57,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 170 transitions, 1577 flow [2023-01-28 05:06:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 05:06:57,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 05:06:57,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1343 transitions. [2023-01-28 05:06:57,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42100313479623824 [2023-01-28 05:06:57,719 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1343 transitions. [2023-01-28 05:06:57,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1343 transitions. [2023-01-28 05:06:57,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:06:57,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1343 transitions. [2023-01-28 05:06:57,723 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 61.04545454545455) internal successors, (1343), 22 states have internal predecessors, (1343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:57,727 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:57,728 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:57,728 INFO L175 Difference]: Start difference. First operand has 97 places, 74 transitions, 613 flow. Second operand 22 states and 1343 transitions. [2023-01-28 05:06:57,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 170 transitions, 1577 flow [2023-01-28 05:06:57,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 170 transitions, 1367 flow, removed 104 selfloop flow, removed 11 redundant places. [2023-01-28 05:06:57,750 INFO L231 Difference]: Finished difference. Result has 107 places, 80 transitions, 699 flow [2023-01-28 05:06:57,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=517, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=699, PETRI_PLACES=107, PETRI_TRANSITIONS=80} [2023-01-28 05:06:57,751 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 87 predicate places. [2023-01-28 05:06:57,751 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 80 transitions, 699 flow [2023-01-28 05:06:57,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:57,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:06:57,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:06:57,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-01-28 05:06:57,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:57,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:06:57,958 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:06:57,958 INFO L85 PathProgramCache]: Analyzing trace with hash 2086276037, now seen corresponding path program 4 times [2023-01-28 05:06:57,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:06:57,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042590423] [2023-01-28 05:06:57,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:06:57,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:06:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:06:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:58,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:06:58,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042590423] [2023-01-28 05:06:58,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042590423] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:06:58,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741193984] [2023-01-28 05:06:58,156 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:06:58,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:58,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:06:58,157 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) [2023-01-28 05:06:58,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-01-28 05:06:58,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:06:58,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:06:58,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 05:06:58,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:06:58,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:58,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:06:58,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:58,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741193984] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:06:58,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:06:58,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-01-28 05:06:58,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142360476] [2023-01-28 05:06:58,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:06:58,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-01-28 05:06:58,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:06:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-01-28 05:06:58,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-01-28 05:06:58,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:06:58,574 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 80 transitions, 699 flow. Second operand has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:58,575 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:06:58,575 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:06:58,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:06:59,162 INFO L130 PetriNetUnfolder]: 295/603 cut-off events. [2023-01-28 05:06:59,162 INFO L131 PetriNetUnfolder]: For 6131/6131 co-relation queries the response was YES. [2023-01-28 05:06:59,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 603 events. 295/603 cut-off events. For 6131/6131 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2999 event pairs, 29 based on Foata normal form. 2/603 useless extension candidates. Maximal degree in co-relation 3086. Up to 160 conditions per place. [2023-01-28 05:06:59,169 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 90 selfloop transitions, 61 changer transitions 22/173 dead transitions. [2023-01-28 05:06:59,169 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 173 transitions, 1710 flow [2023-01-28 05:06:59,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-01-28 05:06:59,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2023-01-28 05:06:59,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 1345 transitions. [2023-01-28 05:06:59,172 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4216300940438871 [2023-01-28 05:06:59,172 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 1345 transitions. [2023-01-28 05:06:59,172 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 1345 transitions. [2023-01-28 05:06:59,173 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:06:59,173 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 1345 transitions. [2023-01-28 05:06:59,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 61.13636363636363) internal successors, (1345), 22 states have internal predecessors, (1345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:59,180 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:59,181 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 145.0) internal successors, (3335), 23 states have internal predecessors, (3335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:59,181 INFO L175 Difference]: Start difference. First operand has 107 places, 80 transitions, 699 flow. Second operand 22 states and 1345 transitions. [2023-01-28 05:06:59,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 173 transitions, 1710 flow [2023-01-28 05:06:59,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 173 transitions, 1478 flow, removed 75 selfloop flow, removed 14 redundant places. [2023-01-28 05:06:59,224 INFO L231 Difference]: Finished difference. Result has 115 places, 91 transitions, 853 flow [2023-01-28 05:06:59,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=853, PETRI_PLACES=115, PETRI_TRANSITIONS=91} [2023-01-28 05:06:59,224 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 95 predicate places. [2023-01-28 05:06:59,225 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 91 transitions, 853 flow [2023-01-28 05:06:59,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 56.8) internal successors, (1136), 20 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:06:59,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:06:59,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:06:59,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-01-28 05:06:59,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:59,432 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:06:59,432 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:06:59,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1344414463, now seen corresponding path program 5 times [2023-01-28 05:06:59,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:06:59,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394417335] [2023-01-28 05:06:59,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:06:59,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:06:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:06:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:59,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:06:59,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394417335] [2023-01-28 05:06:59,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394417335] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:06:59,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508161105] [2023-01-28 05:06:59,595 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:06:59,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:06:59,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:06:59,597 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) [2023-01-28 05:06:59,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-01-28 05:06:59,654 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:06:59,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:06:59,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 05:06:59,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:06:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:06:59,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:00,087 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:00,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508161105] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:00,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:00,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-28 05:07:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362854127] [2023-01-28 05:07:00,088 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:00,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 05:07:00,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 05:07:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2023-01-28 05:07:00,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:00,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 91 transitions, 853 flow. Second operand has 21 states, 21 states have (on average 56.714285714285715) internal successors, (1191), 21 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:00,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:00,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:00,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:00,736 INFO L130 PetriNetUnfolder]: 277/579 cut-off events. [2023-01-28 05:07:00,736 INFO L131 PetriNetUnfolder]: For 5131/5131 co-relation queries the response was YES. [2023-01-28 05:07:00,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3040 conditions, 579 events. 277/579 cut-off events. For 5131/5131 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2886 event pairs, 5 based on Foata normal form. 1/578 useless extension candidates. Maximal degree in co-relation 2934. Up to 300 conditions per place. [2023-01-28 05:07:00,743 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 80 selfloop transitions, 49 changer transitions 20/149 dead transitions. [2023-01-28 05:07:00,743 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 149 transitions, 1482 flow [2023-01-28 05:07:00,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-01-28 05:07:00,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-01-28 05:07:00,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1030 transitions. [2023-01-28 05:07:00,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4178498985801217 [2023-01-28 05:07:00,748 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1030 transitions. [2023-01-28 05:07:00,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1030 transitions. [2023-01-28 05:07:00,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:00,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1030 transitions. [2023-01-28 05:07:00,751 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.588235294117645) internal successors, (1030), 17 states have internal predecessors, (1030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:00,754 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:00,755 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 145.0) internal successors, (2610), 18 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:00,755 INFO L175 Difference]: Start difference. First operand has 115 places, 91 transitions, 853 flow. Second operand 17 states and 1030 transitions. [2023-01-28 05:07:00,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 149 transitions, 1482 flow [2023-01-28 05:07:00,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 149 transitions, 1285 flow, removed 43 selfloop flow, removed 13 redundant places. [2023-01-28 05:07:00,774 INFO L231 Difference]: Finished difference. Result has 123 places, 96 transitions, 879 flow [2023-01-28 05:07:00,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=688, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=879, PETRI_PLACES=123, PETRI_TRANSITIONS=96} [2023-01-28 05:07:00,775 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 103 predicate places. [2023-01-28 05:07:00,776 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 96 transitions, 879 flow [2023-01-28 05:07:00,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.714285714285715) internal successors, (1191), 21 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:00,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:00,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:00,785 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:00,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:00,985 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:00,985 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:00,985 INFO L85 PathProgramCache]: Analyzing trace with hash 538396011, now seen corresponding path program 6 times [2023-01-28 05:07:00,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:00,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832285984] [2023-01-28 05:07:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:00,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:07:01,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:01,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832285984] [2023-01-28 05:07:01,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832285984] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:01,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634809514] [2023-01-28 05:07:01,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:07:01,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:01,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:01,053 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) [2023-01-28 05:07:01,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-01-28 05:07:01,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-01-28 05:07:01,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:01,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2023-01-28 05:07:01,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:01,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:07:01,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:07:01,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634809514] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:01,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:01,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 6 [2023-01-28 05:07:01,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220537269] [2023-01-28 05:07:01,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:01,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-01-28 05:07:01,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:01,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-01-28 05:07:01,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-01-28 05:07:01,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 62 out of 145 [2023-01-28 05:07:01,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 96 transitions, 879 flow. Second operand has 7 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:01,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:01,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 62 of 145 [2023-01-28 05:07:01,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:01,275 INFO L130 PetriNetUnfolder]: 237/471 cut-off events. [2023-01-28 05:07:01,275 INFO L131 PetriNetUnfolder]: For 5720/5720 co-relation queries the response was YES. [2023-01-28 05:07:01,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2492 conditions, 471 events. 237/471 cut-off events. For 5720/5720 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2059 event pairs, 30 based on Foata normal form. 20/486 useless extension candidates. Maximal degree in co-relation 2415. Up to 401 conditions per place. [2023-01-28 05:07:01,280 INFO L137 encePairwiseOnDemand]: 140/145 looper letters, 79 selfloop transitions, 17 changer transitions 2/101 dead transitions. [2023-01-28 05:07:01,280 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 101 transitions, 1050 flow [2023-01-28 05:07:01,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-01-28 05:07:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-01-28 05:07:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 405 transitions. [2023-01-28 05:07:01,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46551724137931033 [2023-01-28 05:07:01,281 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 405 transitions. [2023-01-28 05:07:01,281 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 405 transitions. [2023-01-28 05:07:01,281 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:01,282 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 405 transitions. [2023-01-28 05:07:01,282 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 67.5) internal successors, (405), 6 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:01,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:01,284 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 145.0) internal successors, (1015), 7 states have internal predecessors, (1015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:01,284 INFO L175 Difference]: Start difference. First operand has 123 places, 96 transitions, 879 flow. Second operand 6 states and 405 transitions. [2023-01-28 05:07:01,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 101 transitions, 1050 flow [2023-01-28 05:07:01,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 101 transitions, 949 flow, removed 17 selfloop flow, removed 9 redundant places. [2023-01-28 05:07:01,300 INFO L231 Difference]: Finished difference. Result has 112 places, 86 transitions, 724 flow [2023-01-28 05:07:01,300 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=699, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=724, PETRI_PLACES=112, PETRI_TRANSITIONS=86} [2023-01-28 05:07:01,301 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 92 predicate places. [2023-01-28 05:07:01,301 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 86 transitions, 724 flow [2023-01-28 05:07:01,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:01,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:01,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:01,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:01,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:01,509 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:01,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:01,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1447872089, now seen corresponding path program 7 times [2023-01-28 05:07:01,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:01,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109552042] [2023-01-28 05:07:01,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:01,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:01,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:01,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:01,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109552042] [2023-01-28 05:07:01,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109552042] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:01,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804726588] [2023-01-28 05:07:01,710 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:07:01,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:01,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:01,712 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) [2023-01-28 05:07:01,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-01-28 05:07:01,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:01,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 05:07:01,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:01,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:01,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:02,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804726588] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:02,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:02,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 05:07:02,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392412114] [2023-01-28 05:07:02,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:02,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 05:07:02,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:02,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 05:07:02,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2023-01-28 05:07:02,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:02,060 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 86 transitions, 724 flow. Second operand has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:02,060 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:02,060 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:02,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:03,155 INFO L130 PetriNetUnfolder]: 333/677 cut-off events. [2023-01-28 05:07:03,155 INFO L131 PetriNetUnfolder]: For 8509/8509 co-relation queries the response was YES. [2023-01-28 05:07:03,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3752 conditions, 677 events. 333/677 cut-off events. For 8509/8509 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3447 event pairs, 29 based on Foata normal form. 4/679 useless extension candidates. Maximal degree in co-relation 3559. Up to 272 conditions per place. [2023-01-28 05:07:03,162 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 105 selfloop transitions, 53 changer transitions 67/225 dead transitions. [2023-01-28 05:07:03,163 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 225 transitions, 2130 flow [2023-01-28 05:07:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 05:07:03,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 05:07:03,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2105 transitions. [2023-01-28 05:07:03,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147783251231527 [2023-01-28 05:07:03,167 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2105 transitions. [2023-01-28 05:07:03,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2105 transitions. [2023-01-28 05:07:03,168 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:03,168 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2105 transitions. [2023-01-28 05:07:03,172 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 60.142857142857146) internal successors, (2105), 35 states have internal predecessors, (2105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:03,178 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:03,180 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:03,180 INFO L175 Difference]: Start difference. First operand has 112 places, 86 transitions, 724 flow. Second operand 35 states and 2105 transitions. [2023-01-28 05:07:03,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 225 transitions, 2130 flow [2023-01-28 05:07:03,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 225 transitions, 2039 flow, removed 32 selfloop flow, removed 6 redundant places. [2023-01-28 05:07:03,206 INFO L231 Difference]: Finished difference. Result has 151 places, 98 transitions, 1039 flow [2023-01-28 05:07:03,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1039, PETRI_PLACES=151, PETRI_TRANSITIONS=98} [2023-01-28 05:07:03,207 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 131 predicate places. [2023-01-28 05:07:03,207 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 98 transitions, 1039 flow [2023-01-28 05:07:03,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.8421052631579) internal successors, (1080), 19 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:03,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:03,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:03,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:03,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:03,431 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:03,431 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:03,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1306012647, now seen corresponding path program 8 times [2023-01-28 05:07:03,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:03,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627807489] [2023-01-28 05:07:03,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:03,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:03,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:03,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:03,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627807489] [2023-01-28 05:07:03,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627807489] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:03,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251645374] [2023-01-28 05:07:03,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:07:03,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:03,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:03,615 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) [2023-01-28 05:07:03,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-01-28 05:07:03,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:07:03,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:03,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 05:07:03,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:03,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:03,988 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:03,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251645374] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:03,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:03,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 05:07:03,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108907874] [2023-01-28 05:07:03,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:03,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 05:07:03,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:03,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 05:07:03,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-28 05:07:03,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:03,992 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 98 transitions, 1039 flow. Second operand has 19 states, 19 states have (on average 56.78947368421053) internal successors, (1079), 19 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:03,992 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:03,992 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:03,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:04,848 INFO L130 PetriNetUnfolder]: 291/615 cut-off events. [2023-01-28 05:07:04,848 INFO L131 PetriNetUnfolder]: For 12380/12380 co-relation queries the response was YES. [2023-01-28 05:07:04,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4030 conditions, 615 events. 291/615 cut-off events. For 12380/12380 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 3168 event pairs, 29 based on Foata normal form. 7/620 useless extension candidates. Maximal degree in co-relation 3930. Up to 267 conditions per place. [2023-01-28 05:07:04,853 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 113 selfloop transitions, 63 changer transitions 26/202 dead transitions. [2023-01-28 05:07:04,854 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 202 transitions, 2273 flow [2023-01-28 05:07:04,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 05:07:04,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 05:07:04,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1572 transitions. [2023-01-28 05:07:04,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169761273209549 [2023-01-28 05:07:04,856 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1572 transitions. [2023-01-28 05:07:04,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1572 transitions. [2023-01-28 05:07:04,857 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:04,857 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1572 transitions. [2023-01-28 05:07:04,859 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 60.46153846153846) internal successors, (1572), 26 states have internal predecessors, (1572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:04,863 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:04,864 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:04,864 INFO L175 Difference]: Start difference. First operand has 151 places, 98 transitions, 1039 flow. Second operand 26 states and 1572 transitions. [2023-01-28 05:07:04,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 202 transitions, 2273 flow [2023-01-28 05:07:04,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 202 transitions, 1605 flow, removed 250 selfloop flow, removed 37 redundant places. [2023-01-28 05:07:04,896 INFO L231 Difference]: Finished difference. Result has 137 places, 112 transitions, 1050 flow [2023-01-28 05:07:04,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1050, PETRI_PLACES=137, PETRI_TRANSITIONS=112} [2023-01-28 05:07:04,896 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-01-28 05:07:04,897 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 112 transitions, 1050 flow [2023-01-28 05:07:04,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.78947368421053) internal successors, (1079), 19 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:04,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:04,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:04,905 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:05,102 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,SelfDestructingSolverStorable9 [2023-01-28 05:07:05,103 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:05,103 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:05,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1376530827, now seen corresponding path program 9 times [2023-01-28 05:07:05,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:05,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914266725] [2023-01-28 05:07:05,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:05,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:05,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:05,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:05,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914266725] [2023-01-28 05:07:05,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914266725] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:05,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634352622] [2023-01-28 05:07:05,264 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:07:05,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:05,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:05,265 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) [2023-01-28 05:07:05,268 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-01-28 05:07:05,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-01-28 05:07:05,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:05,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 05:07:05,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:05,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:05,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:05,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:05,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634352622] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:05,625 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:05,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 05:07:05,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181459234] [2023-01-28 05:07:05,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:05,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 05:07:05,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:05,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 05:07:05,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-01-28 05:07:05,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:05,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 112 transitions, 1050 flow. Second operand has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:05,629 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:05,629 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:05,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:06,585 INFO L130 PetriNetUnfolder]: 271/538 cut-off events. [2023-01-28 05:07:06,586 INFO L131 PetriNetUnfolder]: For 6580/6580 co-relation queries the response was YES. [2023-01-28 05:07:06,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3018 conditions, 538 events. 271/538 cut-off events. For 6580/6580 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2489 event pairs, 29 based on Foata normal form. 6/538 useless extension candidates. Maximal degree in co-relation 2920. Up to 267 conditions per place. [2023-01-28 05:07:06,590 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 91 selfloop transitions, 56 changer transitions 39/186 dead transitions. [2023-01-28 05:07:06,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 186 transitions, 1777 flow [2023-01-28 05:07:06,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-01-28 05:07:06,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-01-28 05:07:06,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1789 transitions. [2023-01-28 05:07:06,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41126436781609194 [2023-01-28 05:07:06,593 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1789 transitions. [2023-01-28 05:07:06,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1789 transitions. [2023-01-28 05:07:06,594 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:06,594 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1789 transitions. [2023-01-28 05:07:06,597 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 59.63333333333333) internal successors, (1789), 30 states have internal predecessors, (1789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:06,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:06,602 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 145.0) internal successors, (4495), 31 states have internal predecessors, (4495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:06,602 INFO L175 Difference]: Start difference. First operand has 137 places, 112 transitions, 1050 flow. Second operand 30 states and 1789 transitions. [2023-01-28 05:07:06,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 186 transitions, 1777 flow [2023-01-28 05:07:06,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 186 transitions, 1484 flow, removed 114 selfloop flow, removed 18 redundant places. [2023-01-28 05:07:06,624 INFO L231 Difference]: Finished difference. Result has 152 places, 107 transitions, 929 flow [2023-01-28 05:07:06,624 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=929, PETRI_PLACES=152, PETRI_TRANSITIONS=107} [2023-01-28 05:07:06,624 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 132 predicate places. [2023-01-28 05:07:06,624 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 107 transitions, 929 flow [2023-01-28 05:07:06,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.89473684210526) internal successors, (1081), 19 states have internal predecessors, (1081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:06,625 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:06,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:06,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:06,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:06,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:06,833 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:06,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1798480629, now seen corresponding path program 10 times [2023-01-28 05:07:06,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:06,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521027489] [2023-01-28 05:07:06,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:06,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:06,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:06,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:06,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521027489] [2023-01-28 05:07:06,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521027489] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:06,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581840277] [2023-01-28 05:07:06,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:07:06,991 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:06,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:06,992 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) [2023-01-28 05:07:07,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-01-28 05:07:07,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:07:07,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:07,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 19 conjunts are in the unsatisfiable core [2023-01-28 05:07:07,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:07,167 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:07,313 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:07,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581840277] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:07,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:07,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-01-28 05:07:07,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458016131] [2023-01-28 05:07:07,314 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:07,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-01-28 05:07:07,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:07,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-01-28 05:07:07,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2023-01-28 05:07:07,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:07,316 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 107 transitions, 929 flow. Second operand has 19 states, 19 states have (on average 56.78947368421053) internal successors, (1079), 19 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:07,317 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:07,317 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:07,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:07,971 INFO L130 PetriNetUnfolder]: 252/497 cut-off events. [2023-01-28 05:07:07,972 INFO L131 PetriNetUnfolder]: For 3511/3511 co-relation queries the response was YES. [2023-01-28 05:07:07,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2605 conditions, 497 events. 252/497 cut-off events. For 3511/3511 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2170 event pairs, 11 based on Foata normal form. 5/492 useless extension candidates. Maximal degree in co-relation 2536. Up to 270 conditions per place. [2023-01-28 05:07:07,975 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 121 selfloop transitions, 34 changer transitions 22/177 dead transitions. [2023-01-28 05:07:07,975 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 177 transitions, 1718 flow [2023-01-28 05:07:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-01-28 05:07:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-01-28 05:07:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1383 transitions. [2023-01-28 05:07:07,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41469265367316344 [2023-01-28 05:07:07,978 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1383 transitions. [2023-01-28 05:07:07,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1383 transitions. [2023-01-28 05:07:07,978 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:07,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1383 transitions. [2023-01-28 05:07:07,980 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 60.130434782608695) internal successors, (1383), 23 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:07,983 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:07,984 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 145.0) internal successors, (3480), 24 states have internal predecessors, (3480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:07,984 INFO L175 Difference]: Start difference. First operand has 152 places, 107 transitions, 929 flow. Second operand 23 states and 1383 transitions. [2023-01-28 05:07:07,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 177 transitions, 1718 flow [2023-01-28 05:07:07,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 177 transitions, 1503 flow, removed 42 selfloop flow, removed 36 redundant places. [2023-01-28 05:07:07,999 INFO L231 Difference]: Finished difference. Result has 137 places, 107 transitions, 872 flow [2023-01-28 05:07:07,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=872, PETRI_PLACES=137, PETRI_TRANSITIONS=107} [2023-01-28 05:07:08,000 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 117 predicate places. [2023-01-28 05:07:08,000 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 107 transitions, 872 flow [2023-01-28 05:07:08,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 56.78947368421053) internal successors, (1079), 19 states have internal predecessors, (1079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:08,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:08,001 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:08,011 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:08,206 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,SelfDestructingSolverStorable11 [2023-01-28 05:07:08,206 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:08,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:08,207 INFO L85 PathProgramCache]: Analyzing trace with hash 1918495045, now seen corresponding path program 11 times [2023-01-28 05:07:08,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:08,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332122507] [2023-01-28 05:07:08,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:08,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:08,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:08,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:08,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332122507] [2023-01-28 05:07:08,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332122507] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:08,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151452462] [2023-01-28 05:07:08,373 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:07:08,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:08,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:08,377 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:08,400 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-01-28 05:07:08,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:07:08,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:08,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2023-01-28 05:07:08,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:08,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:08,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:08,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151452462] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:08,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:08,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-01-28 05:07:08,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276125119] [2023-01-28 05:07:08,805 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:08,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 05:07:08,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:08,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 05:07:08,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=324, Unknown=0, NotChecked=0, Total=420 [2023-01-28 05:07:08,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:08,807 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 107 transitions, 872 flow. Second operand has 21 states, 21 states have (on average 56.714285714285715) internal successors, (1191), 21 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:08,807 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:08,807 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:08,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:09,164 INFO L130 PetriNetUnfolder]: 224/434 cut-off events. [2023-01-28 05:07:09,164 INFO L131 PetriNetUnfolder]: For 3069/3069 co-relation queries the response was YES. [2023-01-28 05:07:09,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2225 conditions, 434 events. 224/434 cut-off events. For 3069/3069 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1755 event pairs, 9 based on Foata normal form. 1/431 useless extension candidates. Maximal degree in co-relation 2144. Up to 362 conditions per place. [2023-01-28 05:07:09,167 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 98 selfloop transitions, 23 changer transitions 8/129 dead transitions. [2023-01-28 05:07:09,168 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 129 transitions, 1214 flow [2023-01-28 05:07:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-01-28 05:07:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-01-28 05:07:09,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 657 transitions. [2023-01-28 05:07:09,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41191222570532915 [2023-01-28 05:07:09,170 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 657 transitions. [2023-01-28 05:07:09,170 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 657 transitions. [2023-01-28 05:07:09,170 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:09,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 657 transitions. [2023-01-28 05:07:09,171 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 59.72727272727273) internal successors, (657), 11 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:09,173 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:09,173 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 145.0) internal successors, (1740), 12 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:09,173 INFO L175 Difference]: Start difference. First operand has 137 places, 107 transitions, 872 flow. Second operand 11 states and 657 transitions. [2023-01-28 05:07:09,173 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 129 transitions, 1214 flow [2023-01-28 05:07:09,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 129 transitions, 1116 flow, removed 18 selfloop flow, removed 20 redundant places. [2023-01-28 05:07:09,184 INFO L231 Difference]: Finished difference. Result has 125 places, 108 transitions, 859 flow [2023-01-28 05:07:09,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=859, PETRI_PLACES=125, PETRI_TRANSITIONS=108} [2023-01-28 05:07:09,185 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 105 predicate places. [2023-01-28 05:07:09,185 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 108 transitions, 859 flow [2023-01-28 05:07:09,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.714285714285715) internal successors, (1191), 21 states have internal predecessors, (1191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:09,186 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:09,186 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:09,192 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:09,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-01-28 05:07:09,391 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:09,391 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:09,391 INFO L85 PathProgramCache]: Analyzing trace with hash -762529050, now seen corresponding path program 12 times [2023-01-28 05:07:09,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:09,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590432190] [2023-01-28 05:07:09,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:09,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:09,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:09,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:09,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590432190] [2023-01-28 05:07:09,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590432190] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:09,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482012295] [2023-01-28 05:07:09,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:07:09,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:09,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:09,570 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:09,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-01-28 05:07:09,633 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:07:09,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:09,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 05:07:09,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:09,781 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:09,782 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:10,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:10,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482012295] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:10,002 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:10,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-01-28 05:07:10,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689583633] [2023-01-28 05:07:10,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:10,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 05:07:10,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:10,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 05:07:10,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-01-28 05:07:10,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:10,005 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 108 transitions, 859 flow. Second operand has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:10,005 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:10,005 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:10,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:10,579 INFO L130 PetriNetUnfolder]: 277/546 cut-off events. [2023-01-28 05:07:10,580 INFO L131 PetriNetUnfolder]: For 3628/3628 co-relation queries the response was YES. [2023-01-28 05:07:10,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2708 conditions, 546 events. 277/546 cut-off events. For 3628/3628 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2468 event pairs, 11 based on Foata normal form. 4/546 useless extension candidates. Maximal degree in co-relation 2651. Up to 302 conditions per place. [2023-01-28 05:07:10,583 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 90 selfloop transitions, 71 changer transitions 28/189 dead transitions. [2023-01-28 05:07:10,583 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 189 transitions, 1716 flow [2023-01-28 05:07:10,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-01-28 05:07:10,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-01-28 05:07:10,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1437 transitions. [2023-01-28 05:07:10,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41293103448275864 [2023-01-28 05:07:10,587 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1437 transitions. [2023-01-28 05:07:10,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1437 transitions. [2023-01-28 05:07:10,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:10,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1437 transitions. [2023-01-28 05:07:10,589 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 59.875) internal successors, (1437), 24 states have internal predecessors, (1437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:10,592 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:10,593 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 145.0) internal successors, (3625), 25 states have internal predecessors, (3625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:10,593 INFO L175 Difference]: Start difference. First operand has 125 places, 108 transitions, 859 flow. Second operand 24 states and 1437 transitions. [2023-01-28 05:07:10,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 189 transitions, 1716 flow [2023-01-28 05:07:10,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 189 transitions, 1637 flow, removed 18 selfloop flow, removed 10 redundant places. [2023-01-28 05:07:10,607 INFO L231 Difference]: Finished difference. Result has 145 places, 131 transitions, 1208 flow [2023-01-28 05:07:10,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1208, PETRI_PLACES=145, PETRI_TRANSITIONS=131} [2023-01-28 05:07:10,607 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 125 predicate places. [2023-01-28 05:07:10,608 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 131 transitions, 1208 flow [2023-01-28 05:07:10,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:10,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:10,608 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:10,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:10,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-01-28 05:07:10,813 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:10,813 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash -944601462, now seen corresponding path program 13 times [2023-01-28 05:07:10,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:10,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546420296] [2023-01-28 05:07:10,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:10,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:10,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:11,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:11,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:11,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546420296] [2023-01-28 05:07:11,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546420296] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:11,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912840260] [2023-01-28 05:07:11,003 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:07:11,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:11,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:11,005 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:11,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-01-28 05:07:11,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:11,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 05:07:11,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:11,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:11,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:11,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:11,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912840260] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:11,364 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:11,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-28 05:07:11,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392643561] [2023-01-28 05:07:11,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:11,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 05:07:11,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:11,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 05:07:11,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2023-01-28 05:07:11,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:11,367 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 131 transitions, 1208 flow. Second operand has 22 states, 22 states have (on average 56.72727272727273) internal successors, (1248), 22 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:11,367 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:11,367 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:11,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:11,937 INFO L130 PetriNetUnfolder]: 368/739 cut-off events. [2023-01-28 05:07:11,937 INFO L131 PetriNetUnfolder]: For 5772/5772 co-relation queries the response was YES. [2023-01-28 05:07:11,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4047 conditions, 739 events. 368/739 cut-off events. For 5772/5772 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3741 event pairs, 13 based on Foata normal form. 6/741 useless extension candidates. Maximal degree in co-relation 3945. Up to 205 conditions per place. [2023-01-28 05:07:11,942 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 109 selfloop transitions, 80 changer transitions 67/256 dead transitions. [2023-01-28 05:07:11,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 256 transitions, 2591 flow [2023-01-28 05:07:11,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 05:07:11,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 05:07:11,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1738 transitions. [2023-01-28 05:07:11,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41331747919143874 [2023-01-28 05:07:11,944 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1738 transitions. [2023-01-28 05:07:11,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1738 transitions. [2023-01-28 05:07:11,945 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:11,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1738 transitions. [2023-01-28 05:07:11,947 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 59.93103448275862) internal successors, (1738), 29 states have internal predecessors, (1738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:11,951 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:11,951 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:11,951 INFO L175 Difference]: Start difference. First operand has 145 places, 131 transitions, 1208 flow. Second operand 29 states and 1738 transitions. [2023-01-28 05:07:11,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 256 transitions, 2591 flow [2023-01-28 05:07:11,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 256 transitions, 2349 flow, removed 79 selfloop flow, removed 12 redundant places. [2023-01-28 05:07:11,972 INFO L231 Difference]: Finished difference. Result has 173 places, 128 transitions, 1364 flow [2023-01-28 05:07:11,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1364, PETRI_PLACES=173, PETRI_TRANSITIONS=128} [2023-01-28 05:07:11,973 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 153 predicate places. [2023-01-28 05:07:11,973 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 128 transitions, 1364 flow [2023-01-28 05:07:11,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.72727272727273) internal successors, (1248), 22 states have internal predecessors, (1248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:11,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:11,973 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:11,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:12,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-01-28 05:07:12,179 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:12,179 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:12,179 INFO L85 PathProgramCache]: Analyzing trace with hash -1875183464, now seen corresponding path program 14 times [2023-01-28 05:07:12,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:12,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767385678] [2023-01-28 05:07:12,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:12,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:12,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:12,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:12,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:12,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767385678] [2023-01-28 05:07:12,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767385678] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:12,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386920492] [2023-01-28 05:07:12,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:07:12,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:12,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:12,369 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:12,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-01-28 05:07:12,442 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:07:12,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:12,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 05:07:12,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:12,572 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:12,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:12,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:12,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386920492] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:12,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:12,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-01-28 05:07:12,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737873100] [2023-01-28 05:07:12,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:12,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 05:07:12,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:12,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 05:07:12,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-01-28 05:07:12,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:12,765 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 128 transitions, 1364 flow. Second operand has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:12,765 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:12,765 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:12,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:13,626 INFO L130 PetriNetUnfolder]: 402/798 cut-off events. [2023-01-28 05:07:13,626 INFO L131 PetriNetUnfolder]: For 10464/10464 co-relation queries the response was YES. [2023-01-28 05:07:13,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5262 conditions, 798 events. 402/798 cut-off events. For 10464/10464 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 4068 event pairs, 13 based on Foata normal form. 7/801 useless extension candidates. Maximal degree in co-relation 5137. Up to 223 conditions per place. [2023-01-28 05:07:13,634 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 123 selfloop transitions, 96 changer transitions 32/251 dead transitions. [2023-01-28 05:07:13,634 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3165 flow [2023-01-28 05:07:13,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-01-28 05:07:13,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2023-01-28 05:07:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 1864 transitions. [2023-01-28 05:07:13,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146829810901001 [2023-01-28 05:07:13,636 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 1864 transitions. [2023-01-28 05:07:13,637 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 1864 transitions. [2023-01-28 05:07:13,637 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:13,637 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 1864 transitions. [2023-01-28 05:07:13,639 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 60.12903225806452) internal successors, (1864), 31 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:13,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 145.0) internal successors, (4640), 32 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:13,643 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 145.0) internal successors, (4640), 32 states have internal predecessors, (4640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:13,644 INFO L175 Difference]: Start difference. First operand has 173 places, 128 transitions, 1364 flow. Second operand 31 states and 1864 transitions. [2023-01-28 05:07:13,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3165 flow [2023-01-28 05:07:13,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 251 transitions, 2504 flow, removed 295 selfloop flow, removed 23 redundant places. [2023-01-28 05:07:13,673 INFO L231 Difference]: Finished difference. Result has 175 places, 152 transitions, 1761 flow [2023-01-28 05:07:13,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1137, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1761, PETRI_PLACES=175, PETRI_TRANSITIONS=152} [2023-01-28 05:07:13,673 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 155 predicate places. [2023-01-28 05:07:13,673 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 152 transitions, 1761 flow [2023-01-28 05:07:13,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.73913043478261) internal successors, (1305), 23 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:13,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:13,674 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:13,679 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:13,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:13,879 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:13,879 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:13,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1804665284, now seen corresponding path program 15 times [2023-01-28 05:07:13,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:13,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877427197] [2023-01-28 05:07:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:13,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:14,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:14,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:14,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877427197] [2023-01-28 05:07:14,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877427197] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:14,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6070881] [2023-01-28 05:07:14,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:07:14,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:14,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:14,056 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:14,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-01-28 05:07:14,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 05:07:14,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:14,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 05:07:14,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:14,275 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:14,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:14,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6070881] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:14,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:14,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 21 [2023-01-28 05:07:14,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633431664] [2023-01-28 05:07:14,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:14,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 05:07:14,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:14,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 05:07:14,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2023-01-28 05:07:14,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:14,469 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 152 transitions, 1761 flow. Second operand has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:14,469 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:14,469 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:14,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:15,346 INFO L130 PetriNetUnfolder]: 371/747 cut-off events. [2023-01-28 05:07:15,346 INFO L131 PetriNetUnfolder]: For 9071/9071 co-relation queries the response was YES. [2023-01-28 05:07:15,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4783 conditions, 747 events. 371/747 cut-off events. For 9071/9071 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3741 event pairs, 11 based on Foata normal form. 5/748 useless extension candidates. Maximal degree in co-relation 4675. Up to 221 conditions per place. [2023-01-28 05:07:15,353 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 120 selfloop transitions, 98 changer transitions 31/249 dead transitions. [2023-01-28 05:07:15,353 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 249 transitions, 2918 flow [2023-01-28 05:07:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-01-28 05:07:15,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-01-28 05:07:15,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1746 transitions. [2023-01-28 05:07:15,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41521997621878715 [2023-01-28 05:07:15,356 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1746 transitions. [2023-01-28 05:07:15,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1746 transitions. [2023-01-28 05:07:15,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:15,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1746 transitions. [2023-01-28 05:07:15,358 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 60.206896551724135) internal successors, (1746), 29 states have internal predecessors, (1746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:15,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:15,362 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 145.0) internal successors, (4350), 30 states have internal predecessors, (4350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:15,362 INFO L175 Difference]: Start difference. First operand has 175 places, 152 transitions, 1761 flow. Second operand 29 states and 1746 transitions. [2023-01-28 05:07:15,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 249 transitions, 2918 flow [2023-01-28 05:07:15,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 249 transitions, 2458 flow, removed 177 selfloop flow, removed 18 redundant places. [2023-01-28 05:07:15,412 INFO L231 Difference]: Finished difference. Result has 190 places, 154 transitions, 1710 flow [2023-01-28 05:07:15,413 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1427, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1710, PETRI_PLACES=190, PETRI_TRANSITIONS=154} [2023-01-28 05:07:15,413 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 170 predicate places. [2023-01-28 05:07:15,413 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 154 transitions, 1710 flow [2023-01-28 05:07:15,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.65217391304348) internal successors, (1303), 23 states have internal predecessors, (1303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:15,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:15,413 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:15,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:15,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-01-28 05:07:15,617 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:15,617 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:15,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1268773024, now seen corresponding path program 16 times [2023-01-28 05:07:15,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:15,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801695415] [2023-01-28 05:07:15,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:15,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:15,773 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:15,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:15,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801695415] [2023-01-28 05:07:15,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801695415] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:15,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394886742] [2023-01-28 05:07:15,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:07:15,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:15,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:15,774 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:15,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-01-28 05:07:15,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:07:15,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:15,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 05:07:15,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:15,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:16,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394886742] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:16,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:16,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-01-28 05:07:16,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380093692] [2023-01-28 05:07:16,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:16,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-01-28 05:07:16,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:16,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-01-28 05:07:16,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2023-01-28 05:07:16,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:16,099 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 154 transitions, 1710 flow. Second operand has 21 states, 21 states have (on average 56.76190476190476) internal successors, (1192), 21 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:16,099 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:16,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:16,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:16,710 INFO L130 PetriNetUnfolder]: 394/790 cut-off events. [2023-01-28 05:07:16,710 INFO L131 PetriNetUnfolder]: For 10103/10103 co-relation queries the response was YES. [2023-01-28 05:07:16,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5004 conditions, 790 events. 394/790 cut-off events. For 10103/10103 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3994 event pairs, 15 based on Foata normal form. 5/791 useless extension candidates. Maximal degree in co-relation 4945. Up to 511 conditions per place. [2023-01-28 05:07:16,717 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 157 selfloop transitions, 41 changer transitions 41/239 dead transitions. [2023-01-28 05:07:16,717 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 239 transitions, 2764 flow [2023-01-28 05:07:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-01-28 05:07:16,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-01-28 05:07:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1545 transitions. [2023-01-28 05:07:16,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40981432360742703 [2023-01-28 05:07:16,719 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1545 transitions. [2023-01-28 05:07:16,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1545 transitions. [2023-01-28 05:07:16,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:16,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1545 transitions. [2023-01-28 05:07:16,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 59.42307692307692) internal successors, (1545), 26 states have internal predecessors, (1545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:16,725 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:16,725 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 145.0) internal successors, (3915), 27 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:16,725 INFO L175 Difference]: Start difference. First operand has 190 places, 154 transitions, 1710 flow. Second operand 26 states and 1545 transitions. [2023-01-28 05:07:16,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 239 transitions, 2764 flow [2023-01-28 05:07:16,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 239 transitions, 2488 flow, removed 61 selfloop flow, removed 23 redundant places. [2023-01-28 05:07:16,755 INFO L231 Difference]: Finished difference. Result has 194 places, 157 transitions, 1684 flow [2023-01-28 05:07:16,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1451, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1684, PETRI_PLACES=194, PETRI_TRANSITIONS=157} [2023-01-28 05:07:16,755 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 174 predicate places. [2023-01-28 05:07:16,755 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 157 transitions, 1684 flow [2023-01-28 05:07:16,756 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 56.76190476190476) internal successors, (1192), 21 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:16,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:16,756 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:16,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:16,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-01-28 05:07:16,967 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:16,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:16,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1188036426, now seen corresponding path program 17 times [2023-01-28 05:07:16,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:16,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260064311] [2023-01-28 05:07:16,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:16,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:17,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:17,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:17,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260064311] [2023-01-28 05:07:17,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260064311] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:17,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919946260] [2023-01-28 05:07:17,135 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:07:17,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:17,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:17,136 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:17,162 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-01-28 05:07:17,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:07:17,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:17,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 05:07:17,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:17,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:17,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:17,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:17,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919946260] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:17,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:17,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-28 05:07:17,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685428243] [2023-01-28 05:07:17,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:17,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 05:07:17,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:17,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 05:07:17,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2023-01-28 05:07:17,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:17,493 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 157 transitions, 1684 flow. Second operand has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:17,493 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:17,494 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:17,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:18,285 INFO L130 PetriNetUnfolder]: 466/942 cut-off events. [2023-01-28 05:07:18,286 INFO L131 PetriNetUnfolder]: For 17504/17504 co-relation queries the response was YES. [2023-01-28 05:07:18,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6331 conditions, 942 events. 466/942 cut-off events. For 17504/17504 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 4987 event pairs, 19 based on Foata normal form. 7/945 useless extension candidates. Maximal degree in co-relation 6269. Up to 517 conditions per place. [2023-01-28 05:07:18,310 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 178 selfloop transitions, 57 changer transitions 32/267 dead transitions. [2023-01-28 05:07:18,310 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 267 transitions, 3232 flow [2023-01-28 05:07:18,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 05:07:18,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 05:07:18,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1617 transitions. [2023-01-28 05:07:18,312 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41302681992337165 [2023-01-28 05:07:18,312 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1617 transitions. [2023-01-28 05:07:18,312 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1617 transitions. [2023-01-28 05:07:18,313 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:18,313 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1617 transitions. [2023-01-28 05:07:18,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 59.888888888888886) internal successors, (1617), 27 states have internal predecessors, (1617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:18,318 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:18,318 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:18,319 INFO L175 Difference]: Start difference. First operand has 194 places, 157 transitions, 1684 flow. Second operand 27 states and 1617 transitions. [2023-01-28 05:07:18,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 267 transitions, 3232 flow [2023-01-28 05:07:18,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 267 transitions, 2923 flow, removed 128 selfloop flow, removed 18 redundant places. [2023-01-28 05:07:18,349 INFO L231 Difference]: Finished difference. Result has 204 places, 174 transitions, 2008 flow [2023-01-28 05:07:18,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1537, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2008, PETRI_PLACES=204, PETRI_TRANSITIONS=174} [2023-01-28 05:07:18,349 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 184 predicate places. [2023-01-28 05:07:18,349 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 174 transitions, 2008 flow [2023-01-28 05:07:18,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:18,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:18,350 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:18,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:18,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:18,550 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:18,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:18,551 INFO L85 PathProgramCache]: Analyzing trace with hash 2122586034, now seen corresponding path program 18 times [2023-01-28 05:07:18,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:18,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731474267] [2023-01-28 05:07:18,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:18,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:18,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:18,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:18,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:18,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731474267] [2023-01-28 05:07:18,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731474267] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:18,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095702524] [2023-01-28 05:07:18,713 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:07:18,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:18,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:18,714 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:18,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-01-28 05:07:18,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:07:18,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:18,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 23 conjunts are in the unsatisfiable core [2023-01-28 05:07:18,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:18,930 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:19,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:19,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095702524] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:19,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:19,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2023-01-28 05:07:19,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296949116] [2023-01-28 05:07:19,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:19,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-01-28 05:07:19,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:19,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-01-28 05:07:19,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-01-28 05:07:19,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:19,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 174 transitions, 2008 flow. Second operand has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:19,158 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:19,158 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:19,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:20,247 INFO L130 PetriNetUnfolder]: 556/1126 cut-off events. [2023-01-28 05:07:20,247 INFO L131 PetriNetUnfolder]: For 22866/22866 co-relation queries the response was YES. [2023-01-28 05:07:20,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7954 conditions, 1126 events. 556/1126 cut-off events. For 22866/22866 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 6267 event pairs, 25 based on Foata normal form. 5/1127 useless extension candidates. Maximal degree in co-relation 7887. Up to 616 conditions per place. [2023-01-28 05:07:20,256 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 191 selfloop transitions, 68 changer transitions 39/298 dead transitions. [2023-01-28 05:07:20,256 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 298 transitions, 3805 flow [2023-01-28 05:07:20,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-01-28 05:07:20,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-01-28 05:07:20,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 1630 transitions. [2023-01-28 05:07:20,267 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4163473818646232 [2023-01-28 05:07:20,267 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 1630 transitions. [2023-01-28 05:07:20,267 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 1630 transitions. [2023-01-28 05:07:20,267 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:20,267 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 1630 transitions. [2023-01-28 05:07:20,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 60.370370370370374) internal successors, (1630), 27 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:20,274 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:20,274 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 145.0) internal successors, (4060), 28 states have internal predecessors, (4060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:20,275 INFO L175 Difference]: Start difference. First operand has 204 places, 174 transitions, 2008 flow. Second operand 27 states and 1630 transitions. [2023-01-28 05:07:20,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 298 transitions, 3805 flow [2023-01-28 05:07:20,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 298 transitions, 3518 flow, removed 121 selfloop flow, removed 16 redundant places. [2023-01-28 05:07:20,343 INFO L231 Difference]: Finished difference. Result has 222 places, 196 transitions, 2493 flow [2023-01-28 05:07:20,344 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=1833, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=2493, PETRI_PLACES=222, PETRI_TRANSITIONS=196} [2023-01-28 05:07:20,344 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 202 predicate places. [2023-01-28 05:07:20,345 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 196 transitions, 2493 flow [2023-01-28 05:07:20,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 56.68181818181818) internal successors, (1247), 22 states have internal predecessors, (1247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:20,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:20,346 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:20,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:20,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:20,554 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:20,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:20,554 INFO L85 PathProgramCache]: Analyzing trace with hash 56355927, now seen corresponding path program 19 times [2023-01-28 05:07:20,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:20,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264315597] [2023-01-28 05:07:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:20,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:20,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:20,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:20,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:20,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264315597] [2023-01-28 05:07:20,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264315597] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:20,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692665748] [2023-01-28 05:07:20,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:07:20,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:20,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:20,757 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:20,782 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-01-28 05:07:20,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:20,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 05:07:20,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:20,976 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:20,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:21,188 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:21,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692665748] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:21,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:21,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2023-01-28 05:07:21,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078755701] [2023-01-28 05:07:21,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:21,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-01-28 05:07:21,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:21,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-01-28 05:07:21,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=537, Unknown=0, NotChecked=0, Total=650 [2023-01-28 05:07:21,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:21,201 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 196 transitions, 2493 flow. Second operand has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:21,201 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:21,201 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:21,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:22,536 INFO L130 PetriNetUnfolder]: 743/1452 cut-off events. [2023-01-28 05:07:22,536 INFO L131 PetriNetUnfolder]: For 36204/36204 co-relation queries the response was YES. [2023-01-28 05:07:22,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10999 conditions, 1452 events. 743/1452 cut-off events. For 36204/36204 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 8361 event pairs, 37 based on Foata normal form. 8/1456 useless extension candidates. Maximal degree in co-relation 10923. Up to 581 conditions per place. [2023-01-28 05:07:22,549 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 189 selfloop transitions, 149 changer transitions 36/374 dead transitions. [2023-01-28 05:07:22,549 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 374 transitions, 4925 flow [2023-01-28 05:07:22,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 05:07:22,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 05:07:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2274 transitions. [2023-01-28 05:07:22,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4127041742286751 [2023-01-28 05:07:22,553 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2274 transitions. [2023-01-28 05:07:22,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2274 transitions. [2023-01-28 05:07:22,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:22,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2274 transitions. [2023-01-28 05:07:22,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 59.8421052631579) internal successors, (2274), 38 states have internal predecessors, (2274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:22,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:22,561 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:22,561 INFO L175 Difference]: Start difference. First operand has 222 places, 196 transitions, 2493 flow. Second operand 38 states and 2274 transitions. [2023-01-28 05:07:22,561 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 374 transitions, 4925 flow [2023-01-28 05:07:22,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 374 transitions, 4570 flow, removed 145 selfloop flow, removed 15 redundant places. [2023-01-28 05:07:22,653 INFO L231 Difference]: Finished difference. Result has 249 places, 247 transitions, 3451 flow [2023-01-28 05:07:22,654 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=3451, PETRI_PLACES=249, PETRI_TRANSITIONS=247} [2023-01-28 05:07:22,654 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 229 predicate places. [2023-01-28 05:07:22,654 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 247 transitions, 3451 flow [2023-01-28 05:07:22,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.57692307692308) internal successors, (1471), 26 states have internal predecessors, (1471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:22,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:22,654 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:22,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:22,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:22,855 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:22,855 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash -376590837, now seen corresponding path program 20 times [2023-01-28 05:07:22,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:22,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394107171] [2023-01-28 05:07:22,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:22,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:22,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:23,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:23,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394107171] [2023-01-28 05:07:23,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394107171] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:23,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042311503] [2023-01-28 05:07:23,037 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:07:23,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:23,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:23,039 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:23,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-01-28 05:07:23,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:07:23,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:23,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 05:07:23,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:23,273 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:23,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:23,475 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:23,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042311503] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:23,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:23,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 22 [2023-01-28 05:07:23,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632355054] [2023-01-28 05:07:23,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:23,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-01-28 05:07:23,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:23,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-01-28 05:07:23,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2023-01-28 05:07:23,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:23,478 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 247 transitions, 3451 flow. Second operand has 24 states, 24 states have (on average 56.666666666666664) internal successors, (1360), 24 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:23,478 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:23,478 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:23,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:24,676 INFO L130 PetriNetUnfolder]: 1024/1951 cut-off events. [2023-01-28 05:07:24,677 INFO L131 PetriNetUnfolder]: For 66721/66721 co-relation queries the response was YES. [2023-01-28 05:07:24,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17262 conditions, 1951 events. 1024/1951 cut-off events. For 66721/66721 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 11822 event pairs, 63 based on Foata normal form. 16/1963 useless extension candidates. Maximal degree in co-relation 17179. Up to 915 conditions per place. [2023-01-28 05:07:24,696 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 256 selfloop transitions, 118 changer transitions 89/463 dead transitions. [2023-01-28 05:07:24,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 463 transitions, 7305 flow [2023-01-28 05:07:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-28 05:07:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-28 05:07:24,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2732 transitions. [2023-01-28 05:07:24,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095952023988006 [2023-01-28 05:07:24,703 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2732 transitions. [2023-01-28 05:07:24,703 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2732 transitions. [2023-01-28 05:07:24,704 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:24,704 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2732 transitions. [2023-01-28 05:07:24,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 59.391304347826086) internal successors, (2732), 46 states have internal predecessors, (2732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:24,711 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:24,711 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:24,712 INFO L175 Difference]: Start difference. First operand has 249 places, 247 transitions, 3451 flow. Second operand 46 states and 2732 transitions. [2023-01-28 05:07:24,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 463 transitions, 7305 flow [2023-01-28 05:07:24,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 463 transitions, 6297 flow, removed 432 selfloop flow, removed 25 redundant places. [2023-01-28 05:07:24,902 INFO L231 Difference]: Finished difference. Result has 282 places, 270 transitions, 3999 flow [2023-01-28 05:07:24,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3016, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=247, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=3999, PETRI_PLACES=282, PETRI_TRANSITIONS=270} [2023-01-28 05:07:24,903 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 262 predicate places. [2023-01-28 05:07:24,903 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 270 transitions, 3999 flow [2023-01-28 05:07:24,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 56.666666666666664) internal successors, (1360), 24 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:24,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:24,903 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:24,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:25,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-01-28 05:07:25,104 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:25,104 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:25,104 INFO L85 PathProgramCache]: Analyzing trace with hash -857253995, now seen corresponding path program 21 times [2023-01-28 05:07:25,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:25,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866011735] [2023-01-28 05:07:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:25,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:07:25,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:25,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866011735] [2023-01-28 05:07:25,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866011735] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:25,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517150038] [2023-01-28 05:07:25,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:07:25,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:25,260 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:25,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-01-28 05:07:25,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-01-28 05:07:25,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:25,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 05:07:25,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:25,492 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:25,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:07:25,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517150038] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:25,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:25,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 21 [2023-01-28 05:07:25,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592876961] [2023-01-28 05:07:25,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:25,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-01-28 05:07:25,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:25,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-01-28 05:07:25,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2023-01-28 05:07:25,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:25,661 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 270 transitions, 3999 flow. Second operand has 23 states, 23 states have (on average 56.82608695652174) internal successors, (1307), 23 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:25,662 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:25,662 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:25,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:27,116 INFO L130 PetriNetUnfolder]: 1208/2243 cut-off events. [2023-01-28 05:07:27,116 INFO L131 PetriNetUnfolder]: For 95392/95392 co-relation queries the response was YES. [2023-01-28 05:07:27,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21946 conditions, 2243 events. 1208/2243 cut-off events. For 95392/95392 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 13533 event pairs, 83 based on Foata normal form. 8/2247 useless extension candidates. Maximal degree in co-relation 21847. Up to 1364 conditions per place. [2023-01-28 05:07:27,139 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 291 selfloop transitions, 162 changer transitions 32/485 dead transitions. [2023-01-28 05:07:27,140 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 485 transitions, 8434 flow [2023-01-28 05:07:27,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-28 05:07:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-28 05:07:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2671 transitions. [2023-01-28 05:07:27,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40934865900383144 [2023-01-28 05:07:27,143 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2671 transitions. [2023-01-28 05:07:27,143 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2671 transitions. [2023-01-28 05:07:27,144 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:27,144 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2671 transitions. [2023-01-28 05:07:27,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 59.355555555555554) internal successors, (2671), 45 states have internal predecessors, (2671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:27,151 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:27,151 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:27,151 INFO L175 Difference]: Start difference. First operand has 282 places, 270 transitions, 3999 flow. Second operand 45 states and 2671 transitions. [2023-01-28 05:07:27,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 485 transitions, 8434 flow [2023-01-28 05:07:27,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 485 transitions, 7272 flow, removed 500 selfloop flow, removed 34 redundant places. [2023-01-28 05:07:27,423 INFO L231 Difference]: Finished difference. Result has 288 places, 353 transitions, 5741 flow [2023-01-28 05:07:27,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=3573, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=5741, PETRI_PLACES=288, PETRI_TRANSITIONS=353} [2023-01-28 05:07:27,424 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 268 predicate places. [2023-01-28 05:07:27,424 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 353 transitions, 5741 flow [2023-01-28 05:07:27,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 56.82608695652174) internal successors, (1307), 23 states have internal predecessors, (1307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:27,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:27,424 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:27,431 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:27,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-01-28 05:07:27,629 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:27,629 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:27,629 INFO L85 PathProgramCache]: Analyzing trace with hash -1236654659, now seen corresponding path program 22 times [2023-01-28 05:07:27,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:27,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283574749] [2023-01-28 05:07:27,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:27,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:27,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:27,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283574749] [2023-01-28 05:07:27,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283574749] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:27,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890991786] [2023-01-28 05:07:27,807 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:07:27,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:27,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:27,808 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:27,809 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-01-28 05:07:27,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:07:27,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:27,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 05:07:27,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:27,985 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:27,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:28,202 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:28,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890991786] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:28,202 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:28,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-28 05:07:28,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531999017] [2023-01-28 05:07:28,203 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:28,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 05:07:28,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:28,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 05:07:28,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2023-01-28 05:07:28,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:28,205 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 353 transitions, 5741 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:28,205 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:28,205 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:28,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:29,727 INFO L130 PetriNetUnfolder]: 1239/2321 cut-off events. [2023-01-28 05:07:29,728 INFO L131 PetriNetUnfolder]: For 105658/105658 co-relation queries the response was YES. [2023-01-28 05:07:29,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22555 conditions, 2321 events. 1239/2321 cut-off events. For 105658/105658 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 14077 event pairs, 63 based on Foata normal form. 11/2328 useless extension candidates. Maximal degree in co-relation 22455. Up to 1049 conditions per place. [2023-01-28 05:07:29,754 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 309 selfloop transitions, 180 changer transitions 33/522 dead transitions. [2023-01-28 05:07:29,754 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 522 transitions, 9259 flow [2023-01-28 05:07:29,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-01-28 05:07:29,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2023-01-28 05:07:29,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 2501 transitions. [2023-01-28 05:07:29,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41067323481116585 [2023-01-28 05:07:29,757 INFO L72 ComplementDD]: Start complementDD. Operand 42 states and 2501 transitions. [2023-01-28 05:07:29,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 42 states and 2501 transitions. [2023-01-28 05:07:29,757 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:29,757 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 42 states and 2501 transitions. [2023-01-28 05:07:29,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 43 states, 42 states have (on average 59.54761904761905) internal successors, (2501), 42 states have internal predecessors, (2501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:29,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:29,765 INFO L81 ComplementDD]: Finished complementDD. Result has 43 states, 43 states have (on average 145.0) internal successors, (6235), 43 states have internal predecessors, (6235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:29,765 INFO L175 Difference]: Start difference. First operand has 288 places, 353 transitions, 5741 flow. Second operand 42 states and 2501 transitions. [2023-01-28 05:07:29,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 522 transitions, 9259 flow [2023-01-28 05:07:30,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 522 transitions, 7914 flow, removed 626 selfloop flow, removed 25 redundant places. [2023-01-28 05:07:30,130 INFO L231 Difference]: Finished difference. Result has 312 places, 363 transitions, 5781 flow [2023-01-28 05:07:30,130 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=4930, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=42, PETRI_FLOW=5781, PETRI_PLACES=312, PETRI_TRANSITIONS=363} [2023-01-28 05:07:30,131 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 292 predicate places. [2023-01-28 05:07:30,131 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 363 transitions, 5781 flow [2023-01-28 05:07:30,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:30,131 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:30,131 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:30,136 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-01-28 05:07:30,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:30,332 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:30,332 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:30,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1224381777, now seen corresponding path program 23 times [2023-01-28 05:07:30,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:30,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130325177] [2023-01-28 05:07:30,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:30,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:30,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:30,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:30,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130325177] [2023-01-28 05:07:30,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130325177] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:30,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202414992] [2023-01-28 05:07:30,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:07:30,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:30,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:30,549 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:30,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-01-28 05:07:30,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:07:30,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:30,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 27 conjunts are in the unsatisfiable core [2023-01-28 05:07:30,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:30,779 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:30,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:31,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202414992] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:31,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:31,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-01-28 05:07:31,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644462953] [2023-01-28 05:07:31,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:31,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-01-28 05:07:31,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:31,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-01-28 05:07:31,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=498, Unknown=0, NotChecked=0, Total=600 [2023-01-28 05:07:31,040 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:31,040 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 363 transitions, 5781 flow. Second operand has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:31,040 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:31,040 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:31,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:33,397 INFO L130 PetriNetUnfolder]: 1665/3168 cut-off events. [2023-01-28 05:07:33,398 INFO L131 PetriNetUnfolder]: For 159603/159603 co-relation queries the response was YES. [2023-01-28 05:07:33,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31816 conditions, 3168 events. 1665/3168 cut-off events. For 159603/159603 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 21180 event pairs, 57 based on Foata normal form. 26/3190 useless extension candidates. Maximal degree in co-relation 31709. Up to 1694 conditions per place. [2023-01-28 05:07:33,431 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 409 selfloop transitions, 190 changer transitions 74/673 dead transitions. [2023-01-28 05:07:33,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 360 places, 673 transitions, 11632 flow [2023-01-28 05:07:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-01-28 05:07:33,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2023-01-28 05:07:33,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 3299 transitions. [2023-01-28 05:07:33,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4136677115987461 [2023-01-28 05:07:33,434 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 3299 transitions. [2023-01-28 05:07:33,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 3299 transitions. [2023-01-28 05:07:33,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:33,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 3299 transitions. [2023-01-28 05:07:33,438 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 59.981818181818184) internal successors, (3299), 55 states have internal predecessors, (3299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:33,442 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:33,443 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 145.0) internal successors, (8120), 56 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:33,443 INFO L175 Difference]: Start difference. First operand has 312 places, 363 transitions, 5781 flow. Second operand 55 states and 3299 transitions. [2023-01-28 05:07:33,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 360 places, 673 transitions, 11632 flow [2023-01-28 05:07:33,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 673 transitions, 11103 flow, removed 156 selfloop flow, removed 30 redundant places. [2023-01-28 05:07:33,964 INFO L231 Difference]: Finished difference. Result has 340 places, 484 transitions, 8710 flow [2023-01-28 05:07:33,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=5334, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=8710, PETRI_PLACES=340, PETRI_TRANSITIONS=484} [2023-01-28 05:07:33,965 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 320 predicate places. [2023-01-28 05:07:33,965 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 484 transitions, 8710 flow [2023-01-28 05:07:33,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 56.6) internal successors, (1415), 25 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:33,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:33,965 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:33,970 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:34,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:34,166 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:34,166 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:34,166 INFO L85 PathProgramCache]: Analyzing trace with hash -1590475332, now seen corresponding path program 24 times [2023-01-28 05:07:34,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:34,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102608980] [2023-01-28 05:07:34,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:34,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:34,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:34,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:34,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102608980] [2023-01-28 05:07:34,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102608980] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:34,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471891945] [2023-01-28 05:07:34,402 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:07:34,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:34,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:34,404 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:34,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-01-28 05:07:34,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-01-28 05:07:34,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:34,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 05:07:34,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:34,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:35,012 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:35,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471891945] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:35,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:35,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-28 05:07:35,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103074317] [2023-01-28 05:07:35,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:35,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 05:07:35,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:35,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 05:07:35,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2023-01-28 05:07:35,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:35,017 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 484 transitions, 8710 flow. Second operand has 28 states, 28 states have (on average 56.57142857142857) internal successors, (1584), 28 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:35,017 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:35,017 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:35,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:38,086 INFO L130 PetriNetUnfolder]: 2973/5695 cut-off events. [2023-01-28 05:07:38,086 INFO L131 PetriNetUnfolder]: For 363228/363228 co-relation queries the response was YES. [2023-01-28 05:07:38,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65947 conditions, 5695 events. 2973/5695 cut-off events. For 363228/363228 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 43216 event pairs, 99 based on Foata normal form. 39/5730 useless extension candidates. Maximal degree in co-relation 65835. Up to 1775 conditions per place. [2023-01-28 05:07:38,160 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 476 selfloop transitions, 439 changer transitions 90/1005 dead transitions. [2023-01-28 05:07:38,161 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 1005 transitions, 20173 flow [2023-01-28 05:07:38,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-01-28 05:07:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2023-01-28 05:07:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3194 transitions. [2023-01-28 05:07:38,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41561483409238775 [2023-01-28 05:07:38,168 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3194 transitions. [2023-01-28 05:07:38,168 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3194 transitions. [2023-01-28 05:07:38,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:38,169 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3194 transitions. [2023-01-28 05:07:38,173 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 60.264150943396224) internal successors, (3194), 53 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:38,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:38,180 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 145.0) internal successors, (7830), 54 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:38,180 INFO L175 Difference]: Start difference. First operand has 340 places, 484 transitions, 8710 flow. Second operand 53 states and 3194 transitions. [2023-01-28 05:07:38,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 1005 transitions, 20173 flow [2023-01-28 05:07:39,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1005 transitions, 17491 flow, removed 1243 selfloop flow, removed 31 redundant places. [2023-01-28 05:07:39,259 INFO L231 Difference]: Finished difference. Result has 371 places, 750 transitions, 13577 flow [2023-01-28 05:07:39,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=6456, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=239, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=13577, PETRI_PLACES=371, PETRI_TRANSITIONS=750} [2023-01-28 05:07:39,260 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 351 predicate places. [2023-01-28 05:07:39,260 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 750 transitions, 13577 flow [2023-01-28 05:07:39,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 56.57142857142857) internal successors, (1584), 28 states have internal predecessors, (1584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:39,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:39,260 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:39,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:39,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-01-28 05:07:39,466 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:39,466 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:39,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1528243986, now seen corresponding path program 25 times [2023-01-28 05:07:39,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:39,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059815400] [2023-01-28 05:07:39,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:39,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:39,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:39,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:39,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059815400] [2023-01-28 05:07:39,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059815400] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:39,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850809979] [2023-01-28 05:07:39,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:07:39,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:39,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:39,701 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:39,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-01-28 05:07:39,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:39,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 28 conjunts are in the unsatisfiable core [2023-01-28 05:07:39,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:39,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:39,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:40,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:40,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850809979] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:40,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:40,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 26 [2023-01-28 05:07:40,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898259123] [2023-01-28 05:07:40,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:40,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-01-28 05:07:40,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:40,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-01-28 05:07:40,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-01-28 05:07:40,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:40,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 750 transitions, 13577 flow. Second operand has 28 states, 28 states have (on average 56.642857142857146) internal successors, (1586), 28 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:40,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:40,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:40,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:43,289 INFO L130 PetriNetUnfolder]: 3346/6465 cut-off events. [2023-01-28 05:07:43,289 INFO L131 PetriNetUnfolder]: For 341006/341006 co-relation queries the response was YES. [2023-01-28 05:07:43,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73310 conditions, 6465 events. 3346/6465 cut-off events. For 341006/341006 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 50467 event pairs, 173 based on Foata normal form. 45/6506 useless extension candidates. Maximal degree in co-relation 73189. Up to 3403 conditions per place. [2023-01-28 05:07:43,362 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 567 selfloop transitions, 284 changer transitions 183/1034 dead transitions. [2023-01-28 05:07:43,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1034 transitions, 21725 flow [2023-01-28 05:07:43,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-28 05:07:43,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-28 05:07:43,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2669 transitions. [2023-01-28 05:07:43,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40904214559386975 [2023-01-28 05:07:43,364 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2669 transitions. [2023-01-28 05:07:43,364 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2669 transitions. [2023-01-28 05:07:43,364 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:43,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2669 transitions. [2023-01-28 05:07:43,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 59.31111111111111) internal successors, (2669), 45 states have internal predecessors, (2669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:43,370 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:43,371 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:43,371 INFO L175 Difference]: Start difference. First operand has 371 places, 750 transitions, 13577 flow. Second operand 45 states and 2669 transitions. [2023-01-28 05:07:43,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1034 transitions, 21725 flow [2023-01-28 05:07:44,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 1034 transitions, 19051 flow, removed 1271 selfloop flow, removed 29 redundant places. [2023-01-28 05:07:44,871 INFO L231 Difference]: Finished difference. Result has 399 places, 763 transitions, 13433 flow [2023-01-28 05:07:44,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=11913, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=750, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=488, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=13433, PETRI_PLACES=399, PETRI_TRANSITIONS=763} [2023-01-28 05:07:44,872 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-01-28 05:07:44,872 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 763 transitions, 13433 flow [2023-01-28 05:07:44,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 56.642857142857146) internal successors, (1586), 28 states have internal predecessors, (1586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:44,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:44,872 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:44,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:45,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-01-28 05:07:45,078 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:45,078 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:45,078 INFO L85 PathProgramCache]: Analyzing trace with hash 834360269, now seen corresponding path program 26 times [2023-01-28 05:07:45,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:45,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139690675] [2023-01-28 05:07:45,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:45,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:45,341 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:45,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:45,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139690675] [2023-01-28 05:07:45,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139690675] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:45,342 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654876775] [2023-01-28 05:07:45,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:07:45,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:45,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:45,343 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:45,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-01-28 05:07:45,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:07:45,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:45,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 05:07:45,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:45,574 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:45,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:45,878 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:45,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654876775] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:45,878 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:45,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-01-28 05:07:45,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929185124] [2023-01-28 05:07:45,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:45,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 05:07:45,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:45,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 05:07:45,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2023-01-28 05:07:45,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:45,881 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 763 transitions, 13433 flow. Second operand has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:45,881 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:45,881 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:45,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:48,194 INFO L130 PetriNetUnfolder]: 2635/5302 cut-off events. [2023-01-28 05:07:48,195 INFO L131 PetriNetUnfolder]: For 177078/177078 co-relation queries the response was YES. [2023-01-28 05:07:48,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50188 conditions, 5302 events. 2635/5302 cut-off events. For 177078/177078 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 41478 event pairs, 81 based on Foata normal form. 30/5328 useless extension candidates. Maximal degree in co-relation 50059. Up to 1415 conditions per place. [2023-01-28 05:07:48,255 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 416 selfloop transitions, 422 changer transitions 155/993 dead transitions. [2023-01-28 05:07:48,255 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 993 transitions, 19676 flow [2023-01-28 05:07:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-01-28 05:07:48,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-01-28 05:07:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2677 transitions. [2023-01-28 05:07:48,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4102681992337165 [2023-01-28 05:07:48,258 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2677 transitions. [2023-01-28 05:07:48,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2677 transitions. [2023-01-28 05:07:48,258 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:48,258 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2677 transitions. [2023-01-28 05:07:48,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 59.48888888888889) internal successors, (2677), 45 states have internal predecessors, (2677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:48,264 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:48,264 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 145.0) internal successors, (6670), 46 states have internal predecessors, (6670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:48,264 INFO L175 Difference]: Start difference. First operand has 399 places, 763 transitions, 13433 flow. Second operand 45 states and 2677 transitions. [2023-01-28 05:07:48,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 993 transitions, 19676 flow [2023-01-28 05:07:49,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 993 transitions, 18505 flow, removed 499 selfloop flow, removed 39 redundant places. [2023-01-28 05:07:49,268 INFO L231 Difference]: Finished difference. Result has 402 places, 749 transitions, 14038 flow [2023-01-28 05:07:49,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12630, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=763, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=394, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=14038, PETRI_PLACES=402, PETRI_TRANSITIONS=749} [2023-01-28 05:07:49,269 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 382 predicate places. [2023-01-28 05:07:49,269 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 749 transitions, 14038 flow [2023-01-28 05:07:49,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.56666666666667) internal successors, (1697), 30 states have internal predecessors, (1697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:49,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:49,270 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:49,275 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-01-28 05:07:49,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-01-28 05:07:49,475 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:49,475 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:49,475 INFO L85 PathProgramCache]: Analyzing trace with hash -25703553, now seen corresponding path program 27 times [2023-01-28 05:07:49,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:49,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836463829] [2023-01-28 05:07:49,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:49,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:49,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:49,706 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:49,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:49,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836463829] [2023-01-28 05:07:49,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836463829] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:49,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611629805] [2023-01-28 05:07:49,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:07:49,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:49,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:49,712 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:49,713 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-01-28 05:07:49,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-01-28 05:07:49,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:49,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 05:07:49,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:49,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:50,350 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:50,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611629805] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:50,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:50,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-01-28 05:07:50,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482822796] [2023-01-28 05:07:50,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:50,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 05:07:50,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:50,351 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 05:07:50,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2023-01-28 05:07:50,352 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:50,353 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 749 transitions, 14038 flow. Second operand has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:50,353 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:50,353 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:50,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:52,803 INFO L130 PetriNetUnfolder]: 2416/4845 cut-off events. [2023-01-28 05:07:52,804 INFO L131 PetriNetUnfolder]: For 160642/160642 co-relation queries the response was YES. [2023-01-28 05:07:52,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45963 conditions, 4845 events. 2416/4845 cut-off events. For 160642/160642 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37225 event pairs, 83 based on Foata normal form. 28/4869 useless extension candidates. Maximal degree in co-relation 45835. Up to 1415 conditions per place. [2023-01-28 05:07:52,866 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 397 selfloop transitions, 429 changer transitions 52/878 dead transitions. [2023-01-28 05:07:52,867 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 878 transitions, 16975 flow [2023-01-28 05:07:52,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-01-28 05:07:52,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2023-01-28 05:07:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2613 transitions. [2023-01-28 05:07:52,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095611285266458 [2023-01-28 05:07:52,869 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2613 transitions. [2023-01-28 05:07:52,869 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2613 transitions. [2023-01-28 05:07:52,870 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:52,870 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2613 transitions. [2023-01-28 05:07:52,872 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 59.38636363636363) internal successors, (2613), 44 states have internal predecessors, (2613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:52,875 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:52,875 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 145.0) internal successors, (6525), 45 states have internal predecessors, (6525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:52,875 INFO L175 Difference]: Start difference. First operand has 402 places, 749 transitions, 14038 flow. Second operand 44 states and 2613 transitions. [2023-01-28 05:07:52,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 878 transitions, 16975 flow [2023-01-28 05:07:54,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 878 transitions, 15765 flow, removed 492 selfloop flow, removed 38 redundant places. [2023-01-28 05:07:54,052 INFO L231 Difference]: Finished difference. Result has 399 places, 743 transitions, 13814 flow [2023-01-28 05:07:54,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12973, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=749, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=422, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=13814, PETRI_PLACES=399, PETRI_TRANSITIONS=743} [2023-01-28 05:07:54,053 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 379 predicate places. [2023-01-28 05:07:54,053 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 743 transitions, 13814 flow [2023-01-28 05:07:54,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.516129032258064) internal successors, (1752), 31 states have internal predecessors, (1752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:54,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:54,053 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:54,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:54,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-01-28 05:07:54,255 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:54,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 125395759, now seen corresponding path program 28 times [2023-01-28 05:07:54,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:54,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952161696] [2023-01-28 05:07:54,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:54,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:07:54,440 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:54,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:07:54,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952161696] [2023-01-28 05:07:54,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952161696] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:07:54,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46062097] [2023-01-28 05:07:54,441 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:07:54,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:54,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:07:54,442 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:07:54,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-01-28 05:07:54,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:07:54,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:07:54,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 05:07:54,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:07:54,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:54,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:07:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:07:54,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46062097] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:07:54,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:07:54,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 29 [2023-01-28 05:07:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944428349] [2023-01-28 05:07:54,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:07:54,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 05:07:54,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:07:54,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 05:07:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=783, Unknown=0, NotChecked=0, Total=930 [2023-01-28 05:07:54,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:07:54,968 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 743 transitions, 13814 flow. Second operand has 31 states, 31 states have (on average 56.58064516129032) internal successors, (1754), 31 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:54,968 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:07:54,968 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:07:54,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:07:58,202 INFO L130 PetriNetUnfolder]: 3625/6950 cut-off events. [2023-01-28 05:07:58,202 INFO L131 PetriNetUnfolder]: For 199928/199928 co-relation queries the response was YES. [2023-01-28 05:07:58,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67025 conditions, 6950 events. 3625/6950 cut-off events. For 199928/199928 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 53940 event pairs, 171 based on Foata normal form. 50/6996 useless extension candidates. Maximal degree in co-relation 66903. Up to 1805 conditions per place. [2023-01-28 05:07:58,447 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 364 selfloop transitions, 558 changer transitions 384/1306 dead transitions. [2023-01-28 05:07:58,447 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 1306 transitions, 28646 flow [2023-01-28 05:07:58,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-01-28 05:07:58,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2023-01-28 05:07:58,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 3084 transitions. [2023-01-28 05:07:58,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090185676392573 [2023-01-28 05:07:58,450 INFO L72 ComplementDD]: Start complementDD. Operand 52 states and 3084 transitions. [2023-01-28 05:07:58,450 INFO L73 IsDeterministic]: Start isDeterministic. Operand 52 states and 3084 transitions. [2023-01-28 05:07:58,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:07:58,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 52 states and 3084 transitions. [2023-01-28 05:07:58,453 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 53 states, 52 states have (on average 59.30769230769231) internal successors, (3084), 52 states have internal predecessors, (3084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:58,457 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:58,457 INFO L81 ComplementDD]: Finished complementDD. Result has 53 states, 53 states have (on average 145.0) internal successors, (7685), 53 states have internal predecessors, (7685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:58,457 INFO L175 Difference]: Start difference. First operand has 399 places, 743 transitions, 13814 flow. Second operand 52 states and 3084 transitions. [2023-01-28 05:07:58,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 1306 transitions, 28646 flow [2023-01-28 05:07:59,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1306 transitions, 26993 flow, removed 165 selfloop flow, removed 39 redundant places. [2023-01-28 05:07:59,693 INFO L231 Difference]: Finished difference. Result has 414 places, 812 transitions, 16633 flow [2023-01-28 05:07:59,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=12766, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=743, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=52, PETRI_FLOW=16633, PETRI_PLACES=414, PETRI_TRANSITIONS=812} [2023-01-28 05:07:59,713 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 394 predicate places. [2023-01-28 05:07:59,713 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 812 transitions, 16633 flow [2023-01-28 05:07:59,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.58064516129032) internal successors, (1754), 31 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:07:59,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:07:59,714 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:07:59,720 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-01-28 05:07:59,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:07:59,914 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:07:59,915 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:07:59,915 INFO L85 PathProgramCache]: Analyzing trace with hash -1213169703, now seen corresponding path program 29 times [2023-01-28 05:07:59,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:07:59,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165013342] [2023-01-28 05:07:59,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:07:59,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:07:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:00,103 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:00,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:00,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165013342] [2023-01-28 05:08:00,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165013342] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:00,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512670377] [2023-01-28 05:08:00,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:08:00,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:00,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:00,105 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:00,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-01-28 05:08:00,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-01-28 05:08:00,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:00,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 32 conjunts are in the unsatisfiable core [2023-01-28 05:08:00,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:00,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:00,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512670377] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:00,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:00,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2023-01-28 05:08:00,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870364746] [2023-01-28 05:08:00,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:00,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-01-28 05:08:00,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:00,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-01-28 05:08:00,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2023-01-28 05:08:00,590 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:08:00,591 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 812 transitions, 16633 flow. Second operand has 30 states, 30 states have (on average 56.53333333333333) internal successors, (1696), 30 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:00,591 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:00,591 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:08:00,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:03,652 INFO L130 PetriNetUnfolder]: 2999/5935 cut-off events. [2023-01-28 05:08:03,653 INFO L131 PetriNetUnfolder]: For 160320/160320 co-relation queries the response was YES. [2023-01-28 05:08:03,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56225 conditions, 5935 events. 2999/5935 cut-off events. For 160320/160320 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 45872 event pairs, 151 based on Foata normal form. 29/5960 useless extension candidates. Maximal degree in co-relation 56103. Up to 3402 conditions per place. [2023-01-28 05:08:03,715 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 719 selfloop transitions, 234 changer transitions 149/1102 dead transitions. [2023-01-28 05:08:03,715 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 1102 transitions, 22714 flow [2023-01-28 05:08:03,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-01-28 05:08:03,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2023-01-28 05:08:03,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 2730 transitions. [2023-01-28 05:08:03,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40929535232383807 [2023-01-28 05:08:03,717 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 2730 transitions. [2023-01-28 05:08:03,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 2730 transitions. [2023-01-28 05:08:03,717 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:03,717 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 2730 transitions. [2023-01-28 05:08:03,719 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 59.34782608695652) internal successors, (2730), 46 states have internal predecessors, (2730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:03,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:03,722 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 145.0) internal successors, (6815), 47 states have internal predecessors, (6815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:03,722 INFO L175 Difference]: Start difference. First operand has 414 places, 812 transitions, 16633 flow. Second operand 46 states and 2730 transitions. [2023-01-28 05:08:03,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 1102 transitions, 22714 flow [2023-01-28 05:08:04,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 1102 transitions, 20479 flow, removed 858 selfloop flow, removed 47 redundant places. [2023-01-28 05:08:05,008 INFO L231 Difference]: Finished difference. Result has 403 places, 873 transitions, 16702 flow [2023-01-28 05:08:05,010 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=14940, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=812, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=16702, PETRI_PLACES=403, PETRI_TRANSITIONS=873} [2023-01-28 05:08:05,010 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 383 predicate places. [2023-01-28 05:08:05,010 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 873 transitions, 16702 flow [2023-01-28 05:08:05,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 56.53333333333333) internal successors, (1696), 30 states have internal predecessors, (1696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:05,011 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:05,011 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:05,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:05,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:05,216 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:05,216 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:05,217 INFO L85 PathProgramCache]: Analyzing trace with hash -808262398, now seen corresponding path program 30 times [2023-01-28 05:08:05,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:05,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167489839] [2023-01-28 05:08:05,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:05,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:05,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:05,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:05,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167489839] [2023-01-28 05:08:05,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167489839] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:05,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018530995] [2023-01-28 05:08:05,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:08:05,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:05,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:05,445 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:05,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-01-28 05:08:05,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-01-28 05:08:05,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:05,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 05:08:05,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:05,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:05,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:06,110 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:06,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018530995] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:06,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:06,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 30 [2023-01-28 05:08:06,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863119322] [2023-01-28 05:08:06,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:06,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 05:08:06,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:06,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 05:08:06,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2023-01-28 05:08:06,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:08:06,114 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 873 transitions, 16702 flow. Second operand has 32 states, 32 states have (on average 56.53125) internal successors, (1809), 32 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:06,114 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:06,114 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:08:06,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:08,947 INFO L130 PetriNetUnfolder]: 2565/5240 cut-off events. [2023-01-28 05:08:08,947 INFO L131 PetriNetUnfolder]: For 111733/111733 co-relation queries the response was YES. [2023-01-28 05:08:08,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46269 conditions, 5240 events. 2565/5240 cut-off events. For 111733/111733 co-relation queries the response was YES. Maximal size of possible extension queue 377. Compared 40939 event pairs, 77 based on Foata normal form. 64/5300 useless extension candidates. Maximal degree in co-relation 46155. Up to 1509 conditions per place. [2023-01-28 05:08:09,003 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 457 selfloop transitions, 512 changer transitions 72/1041 dead transitions. [2023-01-28 05:08:09,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 1041 transitions, 21050 flow [2023-01-28 05:08:09,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-01-28 05:08:09,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2023-01-28 05:08:09,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 2887 transitions. [2023-01-28 05:08:09,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4063335679099226 [2023-01-28 05:08:09,006 INFO L72 ComplementDD]: Start complementDD. Operand 49 states and 2887 transitions. [2023-01-28 05:08:09,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 49 states and 2887 transitions. [2023-01-28 05:08:09,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:09,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 49 states and 2887 transitions. [2023-01-28 05:08:09,009 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 50 states, 49 states have (on average 58.91836734693877) internal successors, (2887), 49 states have internal predecessors, (2887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:09,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:09,013 INFO L81 ComplementDD]: Finished complementDD. Result has 50 states, 50 states have (on average 145.0) internal successors, (7250), 50 states have internal predecessors, (7250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:09,013 INFO L175 Difference]: Start difference. First operand has 403 places, 873 transitions, 16702 flow. Second operand 49 states and 2887 transitions. [2023-01-28 05:08:09,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 1041 transitions, 21050 flow [2023-01-28 05:08:09,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1041 transitions, 20410 flow, removed 268 selfloop flow, removed 32 redundant places. [2023-01-28 05:08:09,877 INFO L231 Difference]: Finished difference. Result has 412 places, 891 transitions, 18343 flow [2023-01-28 05:08:09,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=16130, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=873, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=475, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=49, PETRI_FLOW=18343, PETRI_PLACES=412, PETRI_TRANSITIONS=891} [2023-01-28 05:08:09,877 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 392 predicate places. [2023-01-28 05:08:09,878 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 891 transitions, 18343 flow [2023-01-28 05:08:09,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 56.53125) internal successors, (1809), 32 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:09,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:09,878 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:09,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:10,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-01-28 05:08:10,084 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:10,084 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:10,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1662152656, now seen corresponding path program 31 times [2023-01-28 05:08:10,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:10,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062131891] [2023-01-28 05:08:10,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:10,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:10,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:10,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:10,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062131891] [2023-01-28 05:08:10,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062131891] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:10,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022848024] [2023-01-28 05:08:10,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-01-28 05:08:10,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:10,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:10,329 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:10,331 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-01-28 05:08:10,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:10,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2023-01-28 05:08:10,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:10,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:10,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:10,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022848024] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:10,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:10,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 10] total 29 [2023-01-28 05:08:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682565646] [2023-01-28 05:08:10,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:10,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-01-28 05:08:10,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:10,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-01-28 05:08:10,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2023-01-28 05:08:10,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:08:10,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 891 transitions, 18343 flow. Second operand has 31 states, 31 states have (on average 56.58064516129032) internal successors, (1754), 31 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:10,883 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:10,883 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:08:10,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:13,454 INFO L130 PetriNetUnfolder]: 2335/4642 cut-off events. [2023-01-28 05:08:13,455 INFO L131 PetriNetUnfolder]: For 85783/85783 co-relation queries the response was YES. [2023-01-28 05:08:13,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41724 conditions, 4642 events. 2335/4642 cut-off events. For 85783/85783 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 34274 event pairs, 3 based on Foata normal form. 30/4668 useless extension candidates. Maximal degree in co-relation 41612. Up to 2668 conditions per place. [2023-01-28 05:08:13,511 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 752 selfloop transitions, 259 changer transitions 50/1061 dead transitions. [2023-01-28 05:08:13,512 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 1061 transitions, 22180 flow [2023-01-28 05:08:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-01-28 05:08:13,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2023-01-28 05:08:13,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 2262 transitions. [2023-01-28 05:08:13,514 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105263157894737 [2023-01-28 05:08:13,514 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 2262 transitions. [2023-01-28 05:08:13,514 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 2262 transitions. [2023-01-28 05:08:13,515 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:13,515 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 2262 transitions. [2023-01-28 05:08:13,517 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 59.526315789473685) internal successors, (2262), 38 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:13,521 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:13,521 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 145.0) internal successors, (5655), 39 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:13,521 INFO L175 Difference]: Start difference. First operand has 412 places, 891 transitions, 18343 flow. Second operand 38 states and 2262 transitions. [2023-01-28 05:08:13,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 1061 transitions, 22180 flow [2023-01-28 05:08:14,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 1061 transitions, 21212 flow, removed 235 selfloop flow, removed 43 redundant places. [2023-01-28 05:08:14,295 INFO L231 Difference]: Finished difference. Result has 413 places, 941 transitions, 19037 flow [2023-01-28 05:08:14,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=17393, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=891, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=19037, PETRI_PLACES=413, PETRI_TRANSITIONS=941} [2023-01-28 05:08:14,295 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 393 predicate places. [2023-01-28 05:08:14,296 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 941 transitions, 19037 flow [2023-01-28 05:08:14,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 56.58064516129032) internal successors, (1754), 31 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:14,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:14,296 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:14,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:14,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:14,500 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:14,500 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:14,500 INFO L85 PathProgramCache]: Analyzing trace with hash 543377190, now seen corresponding path program 32 times [2023-01-28 05:08:14,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:14,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328877380] [2023-01-28 05:08:14,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:14,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:14,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:14,776 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:14,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:14,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328877380] [2023-01-28 05:08:14,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328877380] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:14,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726512954] [2023-01-28 05:08:14,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-01-28 05:08:14,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:14,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:14,778 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:14,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-01-28 05:08:14,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-01-28 05:08:14,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:14,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 05:08:14,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:15,072 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:15,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726512954] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:15,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:15,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2023-01-28 05:08:15,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021427266] [2023-01-28 05:08:15,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:15,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-01-28 05:08:15,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:15,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-01-28 05:08:15,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=817, Unknown=0, NotChecked=0, Total=992 [2023-01-28 05:08:15,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:08:15,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 941 transitions, 19037 flow. Second operand has 32 states, 32 states have (on average 56.53125) internal successors, (1809), 32 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:15,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:15,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:08:15,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:19,287 INFO L130 PetriNetUnfolder]: 3109/6832 cut-off events. [2023-01-28 05:08:19,288 INFO L131 PetriNetUnfolder]: For 113362/113362 co-relation queries the response was YES. [2023-01-28 05:08:19,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55455 conditions, 6832 events. 3109/6832 cut-off events. For 113362/113362 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 59404 event pairs, 7 based on Foata normal form. 84/6912 useless extension candidates. Maximal degree in co-relation 55335. Up to 2818 conditions per place. [2023-01-28 05:08:19,359 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 931 selfloop transitions, 302 changer transitions 474/1707 dead transitions. [2023-01-28 05:08:19,359 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 1707 transitions, 32940 flow [2023-01-28 05:08:19,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-01-28 05:08:19,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-01-28 05:08:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 3883 transitions. [2023-01-28 05:08:19,363 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119893899204244 [2023-01-28 05:08:19,363 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 3883 transitions. [2023-01-28 05:08:19,363 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 3883 transitions. [2023-01-28 05:08:19,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:19,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 3883 transitions. [2023-01-28 05:08:19,367 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 59.738461538461536) internal successors, (3883), 65 states have internal predecessors, (3883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:19,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 145.0) internal successors, (9570), 66 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:19,372 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 145.0) internal successors, (9570), 66 states have internal predecessors, (9570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:19,372 INFO L175 Difference]: Start difference. First operand has 413 places, 941 transitions, 19037 flow. Second operand 65 states and 3883 transitions. [2023-01-28 05:08:19,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 1707 transitions, 32940 flow [2023-01-28 05:08:20,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 1707 transitions, 32635 flow, removed 83 selfloop flow, removed 23 redundant places. [2023-01-28 05:08:20,255 INFO L231 Difference]: Finished difference. Result has 477 places, 1043 transitions, 21861 flow [2023-01-28 05:08:20,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=18882, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=941, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=752, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=21861, PETRI_PLACES=477, PETRI_TRANSITIONS=1043} [2023-01-28 05:08:20,256 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 457 predicate places. [2023-01-28 05:08:20,256 INFO L495 AbstractCegarLoop]: Abstraction has has 477 places, 1043 transitions, 21861 flow [2023-01-28 05:08:20,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 56.53125) internal successors, (1809), 32 states have internal predecessors, (1809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:20,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:20,257 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:20,262 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-01-28 05:08:20,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:20,462 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:20,462 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:20,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1301031468, now seen corresponding path program 33 times [2023-01-28 05:08:20,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:20,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111544839] [2023-01-28 05:08:20,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:20,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:20,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:20,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111544839] [2023-01-28 05:08:20,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111544839] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:20,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645524272] [2023-01-28 05:08:20,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-01-28 05:08:20,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:20,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:20,708 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:20,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-01-28 05:08:20,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-01-28 05:08:20,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:20,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 36 conjunts are in the unsatisfiable core [2023-01-28 05:08:20,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:20,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:21,246 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:21,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645524272] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:21,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:21,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 31 [2023-01-28 05:08:21,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004495410] [2023-01-28 05:08:21,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:21,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 05:08:21,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:21,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 05:08:21,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 05:08:21,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:08:21,250 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 477 places, 1043 transitions, 21861 flow. Second operand has 33 states, 33 states have (on average 56.484848484848484) internal successors, (1864), 33 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:21,251 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:21,251 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:08:21,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:25,045 INFO L130 PetriNetUnfolder]: 3094/6954 cut-off events. [2023-01-28 05:08:25,045 INFO L131 PetriNetUnfolder]: For 162610/162610 co-relation queries the response was YES. [2023-01-28 05:08:25,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61972 conditions, 6954 events. 3094/6954 cut-off events. For 162610/162610 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 61590 event pairs, 3 based on Foata normal form. 137/7087 useless extension candidates. Maximal degree in co-relation 61831. Up to 2668 conditions per place. [2023-01-28 05:08:25,120 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 724 selfloop transitions, 492 changer transitions 144/1360 dead transitions. [2023-01-28 05:08:25,120 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 480 places, 1360 transitions, 30216 flow [2023-01-28 05:08:25,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-01-28 05:08:25,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-01-28 05:08:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 2086 transitions. [2023-01-28 05:08:25,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4110344827586207 [2023-01-28 05:08:25,122 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 2086 transitions. [2023-01-28 05:08:25,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 2086 transitions. [2023-01-28 05:08:25,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:25,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 2086 transitions. [2023-01-28 05:08:25,124 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 59.6) internal successors, (2086), 35 states have internal predecessors, (2086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:25,126 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:25,126 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 145.0) internal successors, (5220), 36 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:25,126 INFO L175 Difference]: Start difference. First operand has 477 places, 1043 transitions, 21861 flow. Second operand 35 states and 2086 transitions. [2023-01-28 05:08:25,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 480 places, 1360 transitions, 30216 flow [2023-01-28 05:08:26,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1360 transitions, 26633 flow, removed 1403 selfloop flow, removed 48 redundant places. [2023-01-28 05:08:26,830 INFO L231 Difference]: Finished difference. Result has 445 places, 1163 transitions, 23234 flow [2023-01-28 05:08:26,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=19952, PETRI_DIFFERENCE_MINUEND_PLACES=398, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1043, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=342, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=23234, PETRI_PLACES=445, PETRI_TRANSITIONS=1163} [2023-01-28 05:08:26,831 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 425 predicate places. [2023-01-28 05:08:26,831 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 1163 transitions, 23234 flow [2023-01-28 05:08:26,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.484848484848484) internal successors, (1864), 33 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:26,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:26,832 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:26,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:27,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-01-28 05:08:27,033 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:27,034 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:27,034 INFO L85 PathProgramCache]: Analyzing trace with hash -34981713, now seen corresponding path program 34 times [2023-01-28 05:08:27,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:27,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364894710] [2023-01-28 05:08:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:27,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:27,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:27,331 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:27,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:27,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364894710] [2023-01-28 05:08:27,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364894710] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:27,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786907379] [2023-01-28 05:08:27,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-01-28 05:08:27,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:27,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:27,333 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:27,357 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-01-28 05:08:27,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-01-28 05:08:27,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:27,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 05:08:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:27,629 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:27,629 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:27,969 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:27,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1786907379] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:27,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:27,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 31 [2023-01-28 05:08:27,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605046039] [2023-01-28 05:08:27,969 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:27,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-01-28 05:08:27,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:27,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-01-28 05:08:27,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2023-01-28 05:08:27,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:08:27,972 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 1163 transitions, 23234 flow. Second operand has 33 states, 33 states have (on average 56.57575757575758) internal successors, (1867), 33 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:27,972 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:27,973 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:08:27,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:30,427 INFO L130 PetriNetUnfolder]: 2730/5071 cut-off events. [2023-01-28 05:08:30,427 INFO L131 PetriNetUnfolder]: For 64336/64336 co-relation queries the response was YES. [2023-01-28 05:08:30,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45809 conditions, 5071 events. 2730/5071 cut-off events. For 64336/64336 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34760 event pairs, 3 based on Foata normal form. 12/5079 useless extension candidates. Maximal degree in co-relation 45687. Up to 2030 conditions per place. [2023-01-28 05:08:30,485 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 662 selfloop transitions, 572 changer transitions 83/1317 dead transitions. [2023-01-28 05:08:30,485 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 1317 transitions, 27831 flow [2023-01-28 05:08:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-01-28 05:08:30,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2023-01-28 05:08:30,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 2317 transitions. [2023-01-28 05:08:30,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097259062776304 [2023-01-28 05:08:30,487 INFO L72 ComplementDD]: Start complementDD. Operand 39 states and 2317 transitions. [2023-01-28 05:08:30,487 INFO L73 IsDeterministic]: Start isDeterministic. Operand 39 states and 2317 transitions. [2023-01-28 05:08:30,488 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:30,488 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 39 states and 2317 transitions. [2023-01-28 05:08:30,489 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 40 states, 39 states have (on average 59.41025641025641) internal successors, (2317), 39 states have internal predecessors, (2317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:30,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:30,492 INFO L81 ComplementDD]: Finished complementDD. Result has 40 states, 40 states have (on average 145.0) internal successors, (5800), 40 states have internal predecessors, (5800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:30,492 INFO L175 Difference]: Start difference. First operand has 445 places, 1163 transitions, 23234 flow. Second operand 39 states and 2317 transitions. [2023-01-28 05:08:30,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 1317 transitions, 27831 flow [2023-01-28 05:08:31,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 1317 transitions, 26548 flow, removed 505 selfloop flow, removed 26 redundant places. [2023-01-28 05:08:31,214 INFO L231 Difference]: Finished difference. Result has 451 places, 1176 transitions, 24146 flow [2023-01-28 05:08:31,215 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=22013, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=546, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=613, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=24146, PETRI_PLACES=451, PETRI_TRANSITIONS=1176} [2023-01-28 05:08:31,215 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 431 predicate places. [2023-01-28 05:08:31,215 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 1176 transitions, 24146 flow [2023-01-28 05:08:31,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 56.57575757575758) internal successors, (1867), 33 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:31,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:31,215 INFO L208 CegarLoopForPetriNet]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:31,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-01-28 05:08:31,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-01-28 05:08:31,416 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:31,416 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:31,416 INFO L85 PathProgramCache]: Analyzing trace with hash -801870177, now seen corresponding path program 35 times [2023-01-28 05:08:31,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:31,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791202852] [2023-01-28 05:08:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:31,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:31,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:31,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:31,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791202852] [2023-01-28 05:08:31,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791202852] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:31,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278875102] [2023-01-28 05:08:31,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-01-28 05:08:31,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:31,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:31,643 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:31,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-01-28 05:08:31,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2023-01-28 05:08:31,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:31,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 37 conjunts are in the unsatisfiable core [2023-01-28 05:08:31,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:31,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:32,236 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:32,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278875102] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:32,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:32,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 11] total 32 [2023-01-28 05:08:32,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598378976] [2023-01-28 05:08:32,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:32,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-01-28 05:08:32,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:32,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-01-28 05:08:32,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=940, Unknown=0, NotChecked=0, Total=1122 [2023-01-28 05:08:32,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:08:32,240 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 1176 transitions, 24146 flow. Second operand has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:32,240 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:32,240 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:08:32,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:34,814 INFO L130 PetriNetUnfolder]: 2657/4893 cut-off events. [2023-01-28 05:08:34,815 INFO L131 PetriNetUnfolder]: For 58703/58703 co-relation queries the response was YES. [2023-01-28 05:08:34,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44050 conditions, 4893 events. 2657/4893 cut-off events. For 58703/58703 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 33134 event pairs, 3 based on Foata normal form. 9/4898 useless extension candidates. Maximal degree in co-relation 43931. Up to 2030 conditions per place. [2023-01-28 05:08:34,858 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 523 selfloop transitions, 36 changer transitions 717/1276 dead transitions. [2023-01-28 05:08:34,858 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 1276 transitions, 27396 flow [2023-01-28 05:08:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-01-28 05:08:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-01-28 05:08:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 2423 transitions. [2023-01-28 05:08:34,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.407569386038688 [2023-01-28 05:08:34,860 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 2423 transitions. [2023-01-28 05:08:34,860 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 2423 transitions. [2023-01-28 05:08:34,861 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:34,861 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 2423 transitions. [2023-01-28 05:08:34,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 59.09756097560975) internal successors, (2423), 41 states have internal predecessors, (2423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:34,864 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:34,865 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 145.0) internal successors, (6090), 42 states have internal predecessors, (6090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:34,865 INFO L175 Difference]: Start difference. First operand has 451 places, 1176 transitions, 24146 flow. Second operand 41 states and 2423 transitions. [2023-01-28 05:08:34,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 1276 transitions, 27396 flow [2023-01-28 05:08:35,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 1276 transitions, 26889 flow, removed 177 selfloop flow, removed 29 redundant places. [2023-01-28 05:08:35,458 INFO L231 Difference]: Finished difference. Result has 456 places, 548 transitions, 8216 flow [2023-01-28 05:08:35,458 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=23747, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=8216, PETRI_PLACES=456, PETRI_TRANSITIONS=548} [2023-01-28 05:08:35,459 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 436 predicate places. [2023-01-28 05:08:35,459 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 548 transitions, 8216 flow [2023-01-28 05:08:35,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 56.529411764705884) internal successors, (1922), 34 states have internal predecessors, (1922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:35,459 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-01-28 05:08:35,459 INFO L208 CegarLoopForPetriNet]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-01-28 05:08:35,466 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:35,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-01-28 05:08:35,665 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-01-28 05:08:35,665 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-01-28 05:08:35,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1643464096, now seen corresponding path program 36 times [2023-01-28 05:08:35,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-01-28 05:08:35,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262280319] [2023-01-28 05:08:35,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-01-28 05:08:35,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-01-28 05:08:35,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-01-28 05:08:35,956 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:35,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-01-28 05:08:35,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262280319] [2023-01-28 05:08:35,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262280319] provided 0 perfect and 1 imperfect interpolant sequences [2023-01-28 05:08:35,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617933154] [2023-01-28 05:08:35,957 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-01-28 05:08:35,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:35,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-01-28 05:08:35,958 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-01-28 05:08:35,960 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-01-28 05:08:36,028 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-01-28 05:08:36,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-01-28 05:08:36,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 49 conjunts are in the unsatisfiable core [2023-01-28 05:08:36,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-01-28 05:08:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-01-28 05:08:36,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-01-28 05:08:36,801 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-01-28 05:08:36,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617933154] provided 0 perfect and 2 imperfect interpolant sequences [2023-01-28 05:08:36,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-01-28 05:08:36,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 14] total 40 [2023-01-28 05:08:36,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900796345] [2023-01-28 05:08:36,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-01-28 05:08:36,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-01-28 05:08:36,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-01-28 05:08:36,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-01-28 05:08:36,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=346, Invalid=1376, Unknown=0, NotChecked=0, Total=1722 [2023-01-28 05:08:36,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 145 [2023-01-28 05:08:36,804 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 548 transitions, 8216 flow. Second operand has 42 states, 42 states have (on average 56.42857142857143) internal successors, (2370), 42 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:36,804 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-01-28 05:08:36,805 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 145 [2023-01-28 05:08:36,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-01-28 05:08:38,532 INFO L130 PetriNetUnfolder]: 1693/3215 cut-off events. [2023-01-28 05:08:38,532 INFO L131 PetriNetUnfolder]: For 10432/10432 co-relation queries the response was YES. [2023-01-28 05:08:38,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21453 conditions, 3215 events. 1693/3215 cut-off events. For 10432/10432 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 20402 event pairs, 0 based on Foata normal form. 17/3230 useless extension candidates. Maximal degree in co-relation 21339. Up to 985 conditions per place. [2023-01-28 05:08:38,563 INFO L137 encePairwiseOnDemand]: 137/145 looper letters, 0 selfloop transitions, 0 changer transitions 905/905 dead transitions. [2023-01-28 05:08:38,563 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 905 transitions, 14323 flow [2023-01-28 05:08:38,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-01-28 05:08:38,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2023-01-28 05:08:38,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 2985 transitions. [2023-01-28 05:08:38,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40365111561866124 [2023-01-28 05:08:38,565 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 2985 transitions. [2023-01-28 05:08:38,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 2985 transitions. [2023-01-28 05:08:38,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-01-28 05:08:38,566 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 2985 transitions. [2023-01-28 05:08:38,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 58.529411764705884) internal successors, (2985), 51 states have internal predecessors, (2985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:38,573 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 145.0) internal successors, (7540), 52 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:38,574 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 145.0) internal successors, (7540), 52 states have internal predecessors, (7540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:38,574 INFO L175 Difference]: Start difference. First operand has 456 places, 548 transitions, 8216 flow. Second operand 51 states and 2985 transitions. [2023-01-28 05:08:38,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 905 transitions, 14323 flow [2023-01-28 05:08:38,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 905 transitions, 13429 flow, removed 258 selfloop flow, removed 42 redundant places. [2023-01-28 05:08:38,733 INFO L231 Difference]: Finished difference. Result has 276 places, 0 transitions, 0 flow [2023-01-28 05:08:38,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=145, PETRI_DIFFERENCE_MINUEND_FLOW=7659, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=0, PETRI_PLACES=276, PETRI_TRANSITIONS=0} [2023-01-28 05:08:38,734 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 256 predicate places. [2023-01-28 05:08:38,734 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 0 transitions, 0 flow [2023-01-28 05:08:38,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 56.42857142857143) internal successors, (2370), 42 states have internal predecessors, (2370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-01-28 05:08:38,737 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-01-28 05:08:38,737 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-01-28 05:08:38,737 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-01-28 05:08:38,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-01-28 05:08:38,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-01-28 05:08:38,941 INFO L445 BasicCegarLoop]: Path program histogram: [36, 1, 1] [2023-01-28 05:08:38,943 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-01-28 05:08:38,943 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-01-28 05:08:38,945 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.01 05:08:38 BasicIcfg [2023-01-28 05:08:38,945 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-01-28 05:08:38,945 INFO L158 Benchmark]: Toolchain (without parser) took 110298.14ms. Allocated memory was 329.3MB in the beginning and 5.7GB in the end (delta: 5.4GB). Free memory was 290.0MB in the beginning and 3.6GB in the end (delta: -3.3GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. [2023-01-28 05:08:38,945 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 255.9MB. Free memory is still 213.6MB. There was no memory consumed. Max. memory is 16.0GB. [2023-01-28 05:08:38,946 INFO L158 Benchmark]: CACSL2BoogieTranslator took 197.37ms. Allocated memory is still 329.3MB. Free memory was 290.0MB in the beginning and 279.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. [2023-01-28 05:08:38,946 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.65ms. Allocated memory is still 329.3MB. Free memory was 279.1MB in the beginning and 277.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 05:08:38,946 INFO L158 Benchmark]: Boogie Preprocessor took 23.30ms. Allocated memory is still 329.3MB. Free memory was 277.6MB in the beginning and 276.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-01-28 05:08:38,946 INFO L158 Benchmark]: RCFGBuilder took 354.41ms. Allocated memory is still 329.3MB. Free memory was 276.3MB in the beginning and 261.9MB in the end (delta: 14.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-01-28 05:08:38,946 INFO L158 Benchmark]: TraceAbstraction took 109689.16ms. Allocated memory was 329.3MB in the beginning and 5.7GB in the end (delta: 5.4GB). Free memory was 261.4MB in the beginning and 3.6GB in the end (delta: -3.4GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. [2023-01-28 05:08:38,947 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 255.9MB. Free memory is still 213.6MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 197.37ms. Allocated memory is still 329.3MB. Free memory was 290.0MB in the beginning and 279.1MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 28.65ms. Allocated memory is still 329.3MB. Free memory was 279.1MB in the beginning and 277.6MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 23.30ms. Allocated memory is still 329.3MB. Free memory was 277.6MB in the beginning and 276.3MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 354.41ms. Allocated memory is still 329.3MB. Free memory was 276.3MB in the beginning and 261.9MB in the end (delta: 14.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * TraceAbstraction took 109689.16ms. Allocated memory was 329.3MB in the beginning and 5.7GB in the end (delta: 5.4GB). Free memory was 261.4MB in the beginning and 3.6GB in the end (delta: -3.4GB). Peak memory consumption was 2.1GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 72 PlacesBefore, 20 PlacesAfterwards, 71 TransitionsBefore, 15 TransitionsAfterwards, 404 CoEnabledTransitionPairs, 6 FixpointIterations, 38 TrivialSequentialCompositions, 14 ConcurrentSequentialCompositions, 4 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 64 TotalNumberOfCompositions, 449 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 448, independent: 446, independent conditional: 0, independent unconditional: 446, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 218, independent: 216, independent conditional: 0, independent unconditional: 216, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 448, independent: 230, independent conditional: 0, independent unconditional: 230, dependent: 0, dependent conditional: 0, dependent unconditional: 0, unknown: 218, unknown conditional: 0, unknown unconditional: 218] , Statistics on independence cache: Total cache size (in pairs): 19, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 78]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 93 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 109.6s, OverallIterations: 38, TraceHistogramMax: 8, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 74.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 5306 SdHoareTripleChecker+Valid, 12.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 5306 mSDsluCounter, 579 SdHoareTripleChecker+Invalid, 10.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 408 mSDsCounter, 1423 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 29114 IncrementalHoareTripleChecker+Invalid, 30537 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1423 mSolverCounterUnsat, 171 mSDtfsCounter, 29114 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2465 GetRequests, 623 SyntacticMatches, 50 SemanticMatches, 1792 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31147 ImplicationChecksByTransitivity, 29.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=24146occurred in iteration=36, InterpolantAutomatonStates: 1275, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 21.8s InterpolantComputationTime, 1267 NumberOfCodeBlocks, 1267 NumberOfCodeBlocksAsserted, 130 NumberOfCheckSat, 1777 ConstructedInterpolants, 0 QuantifiedInterpolants, 19557 SizeOfPredicates, 219 NumberOfNonLiveVariables, 4594 ConjunctsInSsa, 931 ConjunctsInUnsatCore, 110 InterpolantComputations, 2 PerfectInterpolantSequences, 47/922 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-01-28 05:08:38,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...