./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:48:56,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:48:56,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:48:56,957 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:48:56,957 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:48:56,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:48:56,961 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:48:56,962 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:48:56,964 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:48:56,967 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:48:56,968 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:48:56,969 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:48:56,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:48:56,971 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:48:56,972 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:48:56,974 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:48:56,975 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:48:56,976 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:48:56,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:48:56,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:48:56,982 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:48:56,983 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:48:56,984 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:48:56,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:48:56,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:48:56,991 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:48:56,992 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:48:56,992 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:48:56,993 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:48:56,993 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:48:56,994 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:48:56,994 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:48:56,996 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:48:56,996 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:48:56,997 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:48:56,998 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:48:56,998 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:48:56,998 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:48:56,999 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:48:56,999 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:48:57,000 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:48:57,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:48:57,002 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:48:57,028 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:48:57,029 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:48:57,029 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:48:57,029 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:48:57,030 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:48:57,030 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:48:57,030 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:48:57,031 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:48:57,031 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:48:57,031 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:48:57,032 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:48:57,032 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:48:57,032 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:48:57,032 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:48:57,032 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:48:57,032 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:48:57,032 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:48:57,033 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:48:57,033 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:48:57,033 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:48:57,034 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:48:57,034 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:48:57,034 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:48:57,034 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:48:57,034 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:48:57,035 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:48:57,035 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:48:57,035 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:48:57,035 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:48:57,035 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:48:57,036 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:48:57,036 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:48:57,036 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:48:57,036 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a95f2ef87fd1cf5c8213f05c50508f1a1765fc5482d62813e9c15181aaf2ab6 [2022-07-22 21:48:57,235 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:48:57,264 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:48:57,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:48:57,267 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:48:57,268 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:48:57,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-07-22 21:48:57,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b7aa7c7/8ab8bb8334424e2a85706e84d96197d7/FLAG0fe2a4a8f [2022-07-22 21:48:57,691 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:48:57,692 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c [2022-07-22 21:48:57,696 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b7aa7c7/8ab8bb8334424e2a85706e84d96197d7/FLAG0fe2a4a8f [2022-07-22 21:48:57,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0b7aa7c7/8ab8bb8334424e2a85706e84d96197d7 [2022-07-22 21:48:57,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:48:57,710 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:48:57,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:48:57,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:48:57,713 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:48:57,713 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:57,714 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30644f47 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57, skipping insertion in model container [2022-07-22 21:48:57,714 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:57,719 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:48:57,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:48:57,917 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-07-22 21:48:57,924 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:48:57,930 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:48:57,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-array-sum-alt.wvr.c[2761,2774] [2022-07-22 21:48:57,953 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:48:57,963 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:48:57,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57 WrapperNode [2022-07-22 21:48:57,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:48:57,965 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:48:57,965 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:48:57,965 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:48:57,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:57,986 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:58,013 INFO L137 Inliner]: procedures = 25, calls = 51, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 200 [2022-07-22 21:48:58,013 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:48:58,014 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:48:58,014 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:48:58,014 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:48:58,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:58,021 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:58,025 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:58,026 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:58,030 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:58,034 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:58,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:58,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:48:58,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:48:58,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:48:58,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:48:58,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57" (1/1) ... [2022-07-22 21:48:58,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:48:58,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:48:58,068 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:48:58,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:48:58,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:48:58,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:48:58,092 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:48:58,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:48:58,092 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:48:58,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:48:58,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:48:58,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:48:58,093 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-07-22 21:48:58,093 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-07-22 21:48:58,093 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:48:58,093 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-07-22 21:48:58,094 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-07-22 21:48:58,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:48:58,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:48:58,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:48:58,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:48:58,095 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:48:58,168 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:48:58,170 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:48:58,444 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:48:58,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:48:58,531 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 21:48:58,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:48:58 BoogieIcfgContainer [2022-07-22 21:48:58,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:48:58,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:48:58,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:48:58,537 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:48:58,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:48:57" (1/3) ... [2022-07-22 21:48:58,538 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d5449b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:48:58, skipping insertion in model container [2022-07-22 21:48:58,538 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:48:57" (2/3) ... [2022-07-22 21:48:58,539 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62d5449b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:48:58, skipping insertion in model container [2022-07-22 21:48:58,539 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:48:58" (3/3) ... [2022-07-22 21:48:58,540 INFO L111 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt.wvr.c [2022-07-22 21:48:58,544 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:48:58,551 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:48:58,552 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:48:58,552 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:48:58,605 INFO L135 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-07-22 21:48:58,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 154 places, 156 transitions, 336 flow [2022-07-22 21:48:58,703 INFO L129 PetriNetUnfolder]: 12/153 cut-off events. [2022-07-22 21:48:58,705 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:48:58,708 INFO L84 FinitePrefix]: Finished finitePrefix Result has 166 conditions, 153 events. 12/153 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 97 event pairs, 0 based on Foata normal form. 0/140 useless extension candidates. Maximal degree in co-relation 114. Up to 2 conditions per place. [2022-07-22 21:48:58,709 INFO L82 GeneralOperation]: Start removeDead. Operand has 154 places, 156 transitions, 336 flow [2022-07-22 21:48:58,716 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 140 places, 142 transitions, 302 flow [2022-07-22 21:48:58,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:48:58,739 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@13713328, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1e9b6af [2022-07-22 21:48:58,739 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-07-22 21:48:58,785 INFO L129 PetriNetUnfolder]: 12/141 cut-off events. [2022-07-22 21:48:58,786 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-07-22 21:48:58,786 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:58,786 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:58,787 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:48:58,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:58,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1676153540, now seen corresponding path program 1 times [2022-07-22 21:48:58,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:58,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045322893] [2022-07-22 21:48:58,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:58,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:58,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:58,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:58,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:58,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045322893] [2022-07-22 21:48:58,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045322893] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:58,982 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:58,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:48:58,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953435771] [2022-07-22 21:48:58,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:58,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:48:58,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:59,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:48:59,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:48:59,020 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 138 out of 156 [2022-07-22 21:48:59,026 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 142 transitions, 302 flow. Second operand has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:59,026 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:59,026 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 138 of 156 [2022-07-22 21:48:59,027 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:59,106 INFO L129 PetriNetUnfolder]: 41/279 cut-off events. [2022-07-22 21:48:59,107 INFO L130 PetriNetUnfolder]: For 50/51 co-relation queries the response was YES. [2022-07-22 21:48:59,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 370 conditions, 279 events. 41/279 cut-off events. For 50/51 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 800 event pairs, 15 based on Foata normal form. 39/288 useless extension candidates. Maximal degree in co-relation 229. Up to 59 conditions per place. [2022-07-22 21:48:59,113 INFO L132 encePairwiseOnDemand]: 148/156 looper letters, 9 selfloop transitions, 0 changer transitions 4/134 dead transitions. [2022-07-22 21:48:59,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 134 transitions, 304 flow [2022-07-22 21:48:59,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:48:59,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:48:59,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 293 transitions. [2022-07-22 21:48:59,122 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9391025641025641 [2022-07-22 21:48:59,123 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 293 transitions. [2022-07-22 21:48:59,123 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 293 transitions. [2022-07-22 21:48:59,124 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:59,126 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 293 transitions. [2022-07-22 21:48:59,131 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 146.5) internal successors, (293), 2 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:59,137 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:59,138 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:59,139 INFO L186 Difference]: Start difference. First operand has 140 places, 142 transitions, 302 flow. Second operand 2 states and 293 transitions. [2022-07-22 21:48:59,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 134 transitions, 304 flow [2022-07-22 21:48:59,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 134 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:48:59,146 INFO L242 Difference]: Finished difference. Result has 135 places, 130 transitions, 266 flow [2022-07-22 21:48:59,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=266, PETRI_PLACES=135, PETRI_TRANSITIONS=130} [2022-07-22 21:48:59,151 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, -5 predicate places. [2022-07-22 21:48:59,151 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 130 transitions, 266 flow [2022-07-22 21:48:59,151 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 143.0) internal successors, (286), 2 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:59,151 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:59,151 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:59,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:48:59,152 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:48:59,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:59,153 INFO L85 PathProgramCache]: Analyzing trace with hash 850791868, now seen corresponding path program 1 times [2022-07-22 21:48:59,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:59,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696923388] [2022-07-22 21:48:59,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:59,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:59,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:59,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:59,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:59,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696923388] [2022-07-22 21:48:59,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696923388] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:59,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:59,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:48:59,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066538627] [2022-07-22 21:48:59,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:59,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:48:59,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:59,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:48:59,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:48:59,446 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 113 out of 156 [2022-07-22 21:48:59,447 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 130 transitions, 266 flow. Second operand has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:59,447 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:59,447 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 113 of 156 [2022-07-22 21:48:59,447 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:48:59,636 INFO L129 PetriNetUnfolder]: 175/636 cut-off events. [2022-07-22 21:48:59,637 INFO L130 PetriNetUnfolder]: For 39/40 co-relation queries the response was YES. [2022-07-22 21:48:59,639 INFO L84 FinitePrefix]: Finished finitePrefix Result has 941 conditions, 636 events. 175/636 cut-off events. For 39/40 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 3280 event pairs, 63 based on Foata normal form. 1/589 useless extension candidates. Maximal degree in co-relation 938. Up to 132 conditions per place. [2022-07-22 21:48:59,642 INFO L132 encePairwiseOnDemand]: 148/156 looper letters, 48 selfloop transitions, 6 changer transitions 4/158 dead transitions. [2022-07-22 21:48:59,642 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 158 transitions, 447 flow [2022-07-22 21:48:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:48:59,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:48:59,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 737 transitions. [2022-07-22 21:48:59,648 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7873931623931624 [2022-07-22 21:48:59,648 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 737 transitions. [2022-07-22 21:48:59,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 737 transitions. [2022-07-22 21:48:59,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:48:59,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 737 transitions. [2022-07-22 21:48:59,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 122.83333333333333) internal successors, (737), 6 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:59,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:59,653 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 156.0) internal successors, (1092), 7 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:59,653 INFO L186 Difference]: Start difference. First operand has 135 places, 130 transitions, 266 flow. Second operand 6 states and 737 transitions. [2022-07-22 21:48:59,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 158 transitions, 447 flow [2022-07-22 21:48:59,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 158 transitions, 447 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:48:59,660 INFO L242 Difference]: Finished difference. Result has 139 places, 134 transitions, 302 flow [2022-07-22 21:48:59,660 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=302, PETRI_PLACES=139, PETRI_TRANSITIONS=134} [2022-07-22 21:48:59,661 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, -1 predicate places. [2022-07-22 21:48:59,661 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 134 transitions, 302 flow [2022-07-22 21:48:59,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 117.0) internal successors, (702), 6 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:59,661 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:48:59,662 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:48:59,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:48:59,662 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:48:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:48:59,662 INFO L85 PathProgramCache]: Analyzing trace with hash -527469494, now seen corresponding path program 1 times [2022-07-22 21:48:59,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:48:59,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141169260] [2022-07-22 21:48:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:48:59,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:48:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:48:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:48:59,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:48:59,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141169260] [2022-07-22 21:48:59,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141169260] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:48:59,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:48:59,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:48:59,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110139524] [2022-07-22 21:48:59,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:48:59,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:48:59,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:48:59,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:48:59,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:48:59,805 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 156 [2022-07-22 21:48:59,806 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 134 transitions, 302 flow. Second operand has 7 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:48:59,806 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:48:59,806 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 156 [2022-07-22 21:48:59,807 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:00,110 INFO L129 PetriNetUnfolder]: 603/1708 cut-off events. [2022-07-22 21:49:00,110 INFO L130 PetriNetUnfolder]: For 77/83 co-relation queries the response was YES. [2022-07-22 21:49:00,116 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2863 conditions, 1708 events. 603/1708 cut-off events. For 77/83 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 11742 event pairs, 312 based on Foata normal form. 0/1472 useless extension candidates. Maximal degree in co-relation 2856. Up to 606 conditions per place. [2022-07-22 21:49:00,124 INFO L132 encePairwiseOnDemand]: 147/156 looper letters, 47 selfloop transitions, 8 changer transitions 0/158 dead transitions. [2022-07-22 21:49:00,124 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 158 transitions, 468 flow [2022-07-22 21:49:00,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:49:00,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:49:00,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 984 transitions. [2022-07-22 21:49:00,126 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7884615384615384 [2022-07-22 21:49:00,127 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 984 transitions. [2022-07-22 21:49:00,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 984 transitions. [2022-07-22 21:49:00,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:00,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 984 transitions. [2022-07-22 21:49:00,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.0) internal successors, (984), 8 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:00,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:00,132 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 156.0) internal successors, (1404), 9 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:00,132 INFO L186 Difference]: Start difference. First operand has 139 places, 134 transitions, 302 flow. Second operand 8 states and 984 transitions. [2022-07-22 21:49:00,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 158 transitions, 468 flow [2022-07-22 21:49:00,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 158 transitions, 464 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-22 21:49:00,138 INFO L242 Difference]: Finished difference. Result has 145 places, 137 transitions, 334 flow [2022-07-22 21:49:00,138 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=334, PETRI_PLACES=145, PETRI_TRANSITIONS=137} [2022-07-22 21:49:00,140 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 5 predicate places. [2022-07-22 21:49:00,140 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 137 transitions, 334 flow [2022-07-22 21:49:00,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.42857142857143) internal successors, (836), 7 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:00,140 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:00,141 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:00,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:49:00,141 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:49:00,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:00,141 INFO L85 PathProgramCache]: Analyzing trace with hash -2055474000, now seen corresponding path program 1 times [2022-07-22 21:49:00,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:00,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692150105] [2022-07-22 21:49:00,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:00,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:00,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:00,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:00,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692150105] [2022-07-22 21:49:00,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692150105] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:49:00,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:49:00,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-07-22 21:49:00,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023650603] [2022-07-22 21:49:00,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:00,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:49:00,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:00,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:49:00,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-07-22 21:49:00,414 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 156 [2022-07-22 21:49:00,415 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 137 transitions, 334 flow. Second operand has 11 states, 11 states have (on average 97.72727272727273) internal successors, (1075), 11 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:00,416 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:00,416 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 156 [2022-07-22 21:49:00,416 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:01,024 INFO L129 PetriNetUnfolder]: 1151/2547 cut-off events. [2022-07-22 21:49:01,025 INFO L130 PetriNetUnfolder]: For 295/322 co-relation queries the response was YES. [2022-07-22 21:49:01,030 INFO L84 FinitePrefix]: Finished finitePrefix Result has 4729 conditions, 2547 events. 1151/2547 cut-off events. For 295/322 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 18569 event pairs, 890 based on Foata normal form. 27/2259 useless extension candidates. Maximal degree in co-relation 4720. Up to 1488 conditions per place. [2022-07-22 21:49:01,039 INFO L132 encePairwiseOnDemand]: 143/156 looper letters, 70 selfloop transitions, 12 changer transitions 0/168 dead transitions. [2022-07-22 21:49:01,039 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 168 transitions, 570 flow [2022-07-22 21:49:01,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:49:01,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:49:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1211 transitions. [2022-07-22 21:49:01,042 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6469017094017094 [2022-07-22 21:49:01,043 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1211 transitions. [2022-07-22 21:49:01,043 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1211 transitions. [2022-07-22 21:49:01,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:01,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1211 transitions. [2022-07-22 21:49:01,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 100.91666666666667) internal successors, (1211), 12 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:01,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:01,051 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:01,052 INFO L186 Difference]: Start difference. First operand has 145 places, 137 transitions, 334 flow. Second operand 12 states and 1211 transitions. [2022-07-22 21:49:01,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 168 transitions, 570 flow [2022-07-22 21:49:01,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 168 transitions, 560 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:49:01,056 INFO L242 Difference]: Finished difference. Result has 157 places, 141 transitions, 375 flow [2022-07-22 21:49:01,061 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=375, PETRI_PLACES=157, PETRI_TRANSITIONS=141} [2022-07-22 21:49:01,062 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 17 predicate places. [2022-07-22 21:49:01,062 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 141 transitions, 375 flow [2022-07-22 21:49:01,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 97.72727272727273) internal successors, (1075), 11 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:01,064 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:01,064 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:01,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:49:01,064 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:49:01,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:01,064 INFO L85 PathProgramCache]: Analyzing trace with hash -198156446, now seen corresponding path program 1 times [2022-07-22 21:49:01,065 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:01,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701091470] [2022-07-22 21:49:01,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:01,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:01,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:01,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:01,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701091470] [2022-07-22 21:49:01,216 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701091470] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:49:01,216 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:49:01,216 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-07-22 21:49:01,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77564497] [2022-07-22 21:49:01,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:01,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-22 21:49:01,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:01,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-22 21:49:01,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-07-22 21:49:01,218 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 156 [2022-07-22 21:49:01,219 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 141 transitions, 375 flow. Second operand has 10 states, 10 states have (on average 99.0) internal successors, (990), 10 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:01,219 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:01,219 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 156 [2022-07-22 21:49:01,220 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:01,646 INFO L129 PetriNetUnfolder]: 957/2002 cut-off events. [2022-07-22 21:49:01,646 INFO L130 PetriNetUnfolder]: For 427/445 co-relation queries the response was YES. [2022-07-22 21:49:01,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3965 conditions, 2002 events. 957/2002 cut-off events. For 427/445 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 13063 event pairs, 551 based on Foata normal form. 18/1826 useless extension candidates. Maximal degree in co-relation 3951. Up to 1109 conditions per place. [2022-07-22 21:49:01,689 INFO L132 encePairwiseOnDemand]: 143/156 looper letters, 53 selfloop transitions, 7 changer transitions 21/167 dead transitions. [2022-07-22 21:49:01,689 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 167 transitions, 599 flow [2022-07-22 21:49:01,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 21:49:01,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2022-07-22 21:49:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1220 transitions. [2022-07-22 21:49:01,693 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6517094017094017 [2022-07-22 21:49:01,693 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1220 transitions. [2022-07-22 21:49:01,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1220 transitions. [2022-07-22 21:49:01,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:01,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1220 transitions. [2022-07-22 21:49:01,697 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 101.66666666666667) internal successors, (1220), 12 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:01,700 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:01,701 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 156.0) internal successors, (2028), 13 states have internal predecessors, (2028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:01,701 INFO L186 Difference]: Start difference. First operand has 157 places, 141 transitions, 375 flow. Second operand 12 states and 1220 transitions. [2022-07-22 21:49:01,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 167 transitions, 599 flow [2022-07-22 21:49:01,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 167 transitions, 584 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-22 21:49:01,707 INFO L242 Difference]: Finished difference. Result has 164 places, 135 transitions, 340 flow [2022-07-22 21:49:01,707 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=340, PETRI_PLACES=164, PETRI_TRANSITIONS=135} [2022-07-22 21:49:01,709 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 24 predicate places. [2022-07-22 21:49:01,709 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 135 transitions, 340 flow [2022-07-22 21:49:01,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 99.0) internal successors, (990), 10 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:01,710 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:01,710 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:01,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:49:01,711 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:49:01,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:01,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1924719290, now seen corresponding path program 1 times [2022-07-22 21:49:01,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:01,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061443866] [2022-07-22 21:49:01,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:01,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:01,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:01,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:01,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061443866] [2022-07-22 21:49:01,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061443866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:01,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586132316] [2022-07-22 21:49:01,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:01,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:01,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:01,842 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:49:01,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:49:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:01,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:49:01,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:02,194 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:02,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:02,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:02,364 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586132316] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:02,364 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:49:02,364 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 18 [2022-07-22 21:49:02,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539688273] [2022-07-22 21:49:02,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:02,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:49:02,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:02,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:49:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:49:02,367 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-07-22 21:49:02,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 135 transitions, 340 flow. Second operand has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:02,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:02,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-07-22 21:49:02,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:02,865 INFO L129 PetriNetUnfolder]: 1785/3653 cut-off events. [2022-07-22 21:49:02,865 INFO L130 PetriNetUnfolder]: For 931/931 co-relation queries the response was YES. [2022-07-22 21:49:02,877 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7651 conditions, 3653 events. 1785/3653 cut-off events. For 931/931 co-relation queries the response was YES. Maximal size of possible extension queue 272. Compared 27789 event pairs, 529 based on Foata normal form. 11/3569 useless extension candidates. Maximal degree in co-relation 7635. Up to 793 conditions per place. [2022-07-22 21:49:02,894 INFO L132 encePairwiseOnDemand]: 145/156 looper letters, 78 selfloop transitions, 17 changer transitions 0/191 dead transitions. [2022-07-22 21:49:02,895 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 191 transitions, 685 flow [2022-07-22 21:49:02,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:49:02,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:49:02,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1294 transitions. [2022-07-22 21:49:02,898 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.754079254079254 [2022-07-22 21:49:02,898 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1294 transitions. [2022-07-22 21:49:02,898 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1294 transitions. [2022-07-22 21:49:02,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:02,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1294 transitions. [2022-07-22 21:49:02,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 117.63636363636364) internal successors, (1294), 11 states have internal predecessors, (1294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:02,904 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:02,905 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:02,905 INFO L186 Difference]: Start difference. First operand has 164 places, 135 transitions, 340 flow. Second operand 11 states and 1294 transitions. [2022-07-22 21:49:02,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 191 transitions, 685 flow [2022-07-22 21:49:02,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 191 transitions, 624 flow, removed 23 selfloop flow, removed 14 redundant places. [2022-07-22 21:49:02,918 INFO L242 Difference]: Finished difference. Result has 153 places, 147 transitions, 403 flow [2022-07-22 21:49:02,918 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=309, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=403, PETRI_PLACES=153, PETRI_TRANSITIONS=147} [2022-07-22 21:49:02,922 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 13 predicate places. [2022-07-22 21:49:02,922 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 147 transitions, 403 flow [2022-07-22 21:49:02,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:02,923 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:02,923 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:02,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:49:03,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 21:49:03,140 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:49:03,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:03,141 INFO L85 PathProgramCache]: Analyzing trace with hash -478381738, now seen corresponding path program 2 times [2022-07-22 21:49:03,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:03,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171800832] [2022-07-22 21:49:03,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:03,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:03,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:03,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:03,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171800832] [2022-07-22 21:49:03,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171800832] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:03,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342734489] [2022-07-22 21:49:03,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 21:49:03,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:03,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:03,238 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:49:03,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:49:03,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:49:03,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:49:03,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:49:03,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:03,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:03,457 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:03,520 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342734489] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:49:03,520 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:49:03,520 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 17 [2022-07-22 21:49:03,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514302529] [2022-07-22 21:49:03,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:49:03,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 21:49:03,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:03,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 21:49:03,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-07-22 21:49:03,522 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 156 [2022-07-22 21:49:03,524 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 147 transitions, 403 flow. Second operand has 17 states, 17 states have (on average 109.6470588235294) internal successors, (1864), 17 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) [2022-07-22 21:49:03,524 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:03,524 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 156 [2022-07-22 21:49:03,524 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:04,825 INFO L129 PetriNetUnfolder]: 3967/7607 cut-off events. [2022-07-22 21:49:04,825 INFO L130 PetriNetUnfolder]: For 2830/2867 co-relation queries the response was YES. [2022-07-22 21:49:04,853 INFO L84 FinitePrefix]: Finished finitePrefix Result has 17618 conditions, 7607 events. 3967/7607 cut-off events. For 2830/2867 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 60936 event pairs, 288 based on Foata normal form. 22/7193 useless extension candidates. Maximal degree in co-relation 17606. Up to 742 conditions per place. [2022-07-22 21:49:04,893 INFO L132 encePairwiseOnDemand]: 140/156 looper letters, 219 selfloop transitions, 88 changer transitions 0/400 dead transitions. [2022-07-22 21:49:04,893 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 400 transitions, 1797 flow [2022-07-22 21:49:04,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 21:49:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-22 21:49:04,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2831 transitions. [2022-07-22 21:49:04,899 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7561431623931624 [2022-07-22 21:49:04,900 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2831 transitions. [2022-07-22 21:49:04,900 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2831 transitions. [2022-07-22 21:49:04,901 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:04,902 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2831 transitions. [2022-07-22 21:49:04,907 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 117.95833333333333) internal successors, (2831), 24 states have internal predecessors, (2831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:04,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:04,915 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:04,915 INFO L186 Difference]: Start difference. First operand has 153 places, 147 transitions, 403 flow. Second operand 24 states and 2831 transitions. [2022-07-22 21:49:04,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 400 transitions, 1797 flow [2022-07-22 21:49:04,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 400 transitions, 1792 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:49:04,948 INFO L242 Difference]: Finished difference. Result has 191 places, 228 transitions, 1139 flow [2022-07-22 21:49:04,949 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1139, PETRI_PLACES=191, PETRI_TRANSITIONS=228} [2022-07-22 21:49:04,950 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 51 predicate places. [2022-07-22 21:49:04,950 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 228 transitions, 1139 flow [2022-07-22 21:49:04,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 109.6470588235294) internal successors, (1864), 17 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) [2022-07-22 21:49:04,951 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:04,951 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:04,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-07-22 21:49:05,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-07-22 21:49:05,173 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:49:05,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:05,173 INFO L85 PathProgramCache]: Analyzing trace with hash 2133670856, now seen corresponding path program 1 times [2022-07-22 21:49:05,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:05,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799309507] [2022-07-22 21:49:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:05,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:05,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:05,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:05,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799309507] [2022-07-22 21:49:05,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799309507] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:05,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245405000] [2022-07-22 21:49:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:05,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:05,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:05,261 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:49:05,262 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:49:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:05,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:49:05,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:05,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:05,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:05,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245405000] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:05,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:49:05,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 7] total 14 [2022-07-22 21:49:05,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793060900] [2022-07-22 21:49:05,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:05,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:49:05,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:05,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:49:05,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2022-07-22 21:49:05,586 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 156 [2022-07-22 21:49:05,588 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 228 transitions, 1139 flow. Second operand has 7 states, 7 states have (on average 119.57142857142857) internal successors, (837), 7 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:05,588 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:05,588 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 156 [2022-07-22 21:49:05,588 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:06,050 INFO L129 PetriNetUnfolder]: 1417/3348 cut-off events. [2022-07-22 21:49:06,050 INFO L130 PetriNetUnfolder]: For 12139/12713 co-relation queries the response was YES. [2022-07-22 21:49:06,073 INFO L84 FinitePrefix]: Finished finitePrefix Result has 9866 conditions, 3348 events. 1417/3348 cut-off events. For 12139/12713 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 26563 event pairs, 351 based on Foata normal form. 173/3320 useless extension candidates. Maximal degree in co-relation 9836. Up to 1052 conditions per place. [2022-07-22 21:49:06,091 INFO L132 encePairwiseOnDemand]: 148/156 looper letters, 67 selfloop transitions, 24 changer transitions 0/247 dead transitions. [2022-07-22 21:49:06,091 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 247 transitions, 1452 flow [2022-07-22 21:49:06,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 21:49:06,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-07-22 21:49:06,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 852 transitions. [2022-07-22 21:49:06,094 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7802197802197802 [2022-07-22 21:49:06,094 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 852 transitions. [2022-07-22 21:49:06,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 852 transitions. [2022-07-22 21:49:06,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:06,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 852 transitions. [2022-07-22 21:49:06,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 121.71428571428571) internal successors, (852), 7 states have internal predecessors, (852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:06,097 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 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) [2022-07-22 21:49:06,098 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 156.0) internal successors, (1248), 8 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) [2022-07-22 21:49:06,098 INFO L186 Difference]: Start difference. First operand has 191 places, 228 transitions, 1139 flow. Second operand 7 states and 852 transitions. [2022-07-22 21:49:06,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 247 transitions, 1452 flow [2022-07-22 21:49:06,129 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 247 transitions, 1406 flow, removed 7 selfloop flow, removed 8 redundant places. [2022-07-22 21:49:06,133 INFO L242 Difference]: Finished difference. Result has 190 places, 228 transitions, 1149 flow [2022-07-22 21:49:06,133 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1076, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1149, PETRI_PLACES=190, PETRI_TRANSITIONS=228} [2022-07-22 21:49:06,134 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 50 predicate places. [2022-07-22 21:49:06,134 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 228 transitions, 1149 flow [2022-07-22 21:49:06,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 119.57142857142857) internal successors, (837), 7 states have internal predecessors, (837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:06,134 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:06,135 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:06,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 21:49:06,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:06,346 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:49:06,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:06,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1272634738, now seen corresponding path program 3 times [2022-07-22 21:49:06,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:06,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68575773] [2022-07-22 21:49:06,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:06,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:06,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:06,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:06,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68575773] [2022-07-22 21:49:06,417 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68575773] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:06,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45630655] [2022-07-22 21:49:06,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:49:06,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:06,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:06,440 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:49:06,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:49:06,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:49:06,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:49:06,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:49:06,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:06,671 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:06,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:06,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45630655] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:49:06,816 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:49:06,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2022-07-22 21:49:06,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621664149] [2022-07-22 21:49:06,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:49:06,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-22 21:49:06,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-22 21:49:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2022-07-22 21:49:06,818 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-07-22 21:49:06,820 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 228 transitions, 1149 flow. Second operand has 18 states, 18 states have (on average 112.0) internal successors, (2016), 18 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:06,820 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:06,820 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-07-22 21:49:06,820 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:07,829 INFO L129 PetriNetUnfolder]: 3696/7312 cut-off events. [2022-07-22 21:49:07,830 INFO L130 PetriNetUnfolder]: For 14125/14444 co-relation queries the response was YES. [2022-07-22 21:49:07,865 INFO L84 FinitePrefix]: Finished finitePrefix Result has 22825 conditions, 7312 events. 3696/7312 cut-off events. For 14125/14444 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 57903 event pairs, 547 based on Foata normal form. 105/7253 useless extension candidates. Maximal degree in co-relation 22797. Up to 1203 conditions per place. [2022-07-22 21:49:07,975 INFO L132 encePairwiseOnDemand]: 143/156 looper letters, 142 selfloop transitions, 124 changer transitions 0/379 dead transitions. [2022-07-22 21:49:07,975 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 379 transitions, 2569 flow [2022-07-22 21:49:07,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 21:49:07,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2022-07-22 21:49:07,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1753 transitions. [2022-07-22 21:49:07,979 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7491452991452991 [2022-07-22 21:49:07,979 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1753 transitions. [2022-07-22 21:49:07,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1753 transitions. [2022-07-22 21:49:07,980 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:07,980 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1753 transitions. [2022-07-22 21:49:07,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 116.86666666666666) internal successors, (1753), 15 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:07,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 156.0) internal successors, (2496), 16 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:07,987 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 156.0) internal successors, (2496), 16 states have internal predecessors, (2496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:07,987 INFO L186 Difference]: Start difference. First operand has 190 places, 228 transitions, 1149 flow. Second operand 15 states and 1753 transitions. [2022-07-22 21:49:07,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 379 transitions, 2569 flow [2022-07-22 21:49:08,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 379 transitions, 2534 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:49:08,051 INFO L242 Difference]: Finished difference. Result has 205 places, 295 transitions, 2092 flow [2022-07-22 21:49:08,052 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=2092, PETRI_PLACES=205, PETRI_TRANSITIONS=295} [2022-07-22 21:49:08,052 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 65 predicate places. [2022-07-22 21:49:08,052 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 295 transitions, 2092 flow [2022-07-22 21:49:08,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 112.0) internal successors, (2016), 18 states have internal predecessors, (2016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:08,053 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:08,053 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:08,077 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:49:08,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:08,268 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:49:08,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:08,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1599724562, now seen corresponding path program 4 times [2022-07-22 21:49:08,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:08,268 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135903455] [2022-07-22 21:49:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:08,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:08,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:08,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:08,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135903455] [2022-07-22 21:49:08,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135903455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:08,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982977555] [2022-07-22 21:49:08,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:49:08,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:08,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:08,352 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:49:08,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:49:08,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:49:08,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:49:08,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:49:08,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:08,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:08,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:08,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982977555] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:08,724 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:49:08,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 19 [2022-07-22 21:49:08,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827377024] [2022-07-22 21:49:08,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:08,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:49:08,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:08,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:49:08,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:49:08,726 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-07-22 21:49:08,727 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 295 transitions, 2092 flow. Second operand has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:08,727 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:08,728 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-07-22 21:49:08,728 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:09,894 INFO L129 PetriNetUnfolder]: 4090/8256 cut-off events. [2022-07-22 21:49:09,894 INFO L130 PetriNetUnfolder]: For 28344/28804 co-relation queries the response was YES. [2022-07-22 21:49:09,948 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29093 conditions, 8256 events. 4090/8256 cut-off events. For 28344/28804 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 68190 event pairs, 645 based on Foata normal form. 236/8329 useless extension candidates. Maximal degree in co-relation 29059. Up to 1978 conditions per place. [2022-07-22 21:49:09,993 INFO L132 encePairwiseOnDemand]: 143/156 looper letters, 135 selfloop transitions, 126 changer transitions 0/374 dead transitions. [2022-07-22 21:49:09,994 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 374 transitions, 3108 flow [2022-07-22 21:49:09,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-22 21:49:09,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-07-22 21:49:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1304 transitions. [2022-07-22 21:49:09,996 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7599067599067599 [2022-07-22 21:49:09,996 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1304 transitions. [2022-07-22 21:49:09,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1304 transitions. [2022-07-22 21:49:09,997 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:09,997 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1304 transitions. [2022-07-22 21:49:09,999 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 118.54545454545455) internal successors, (1304), 11 states have internal predecessors, (1304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:10,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:10,001 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 156.0) internal successors, (1872), 12 states have internal predecessors, (1872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:10,002 INFO L186 Difference]: Start difference. First operand has 205 places, 295 transitions, 2092 flow. Second operand 11 states and 1304 transitions. [2022-07-22 21:49:10,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 374 transitions, 3108 flow [2022-07-22 21:49:10,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 374 transitions, 3069 flow, removed 15 selfloop flow, removed 5 redundant places. [2022-07-22 21:49:10,161 INFO L242 Difference]: Finished difference. Result has 215 places, 317 transitions, 2786 flow [2022-07-22 21:49:10,161 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=2067, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2786, PETRI_PLACES=215, PETRI_TRANSITIONS=317} [2022-07-22 21:49:10,162 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 75 predicate places. [2022-07-22 21:49:10,162 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 317 transitions, 2786 flow [2022-07-22 21:49:10,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:10,163 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:10,163 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:10,180 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-22 21:49:10,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 21:49:10,379 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:49:10,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:10,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1017724018, now seen corresponding path program 5 times [2022-07-22 21:49:10,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:10,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357936838] [2022-07-22 21:49:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:10,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:10,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:10,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357936838] [2022-07-22 21:49:10,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357936838] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:10,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227400138] [2022-07-22 21:49:10,461 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:49:10,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:10,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:10,462 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:49:10,463 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 21:49:10,541 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:49:10,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:49:10,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 21:49:10,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:10,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:10,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:10,729 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227400138] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:49:10,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:49:10,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 16 [2022-07-22 21:49:10,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786098399] [2022-07-22 21:49:10,730 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:49:10,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 21:49:10,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:10,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 21:49:10,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2022-07-22 21:49:10,731 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 156 [2022-07-22 21:49:10,733 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 317 transitions, 2786 flow. Second operand has 16 states, 16 states have (on average 109.8125) internal successors, (1757), 16 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:10,733 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:10,733 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 156 [2022-07-22 21:49:10,733 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:12,691 INFO L129 PetriNetUnfolder]: 5597/10705 cut-off events. [2022-07-22 21:49:12,691 INFO L130 PetriNetUnfolder]: For 60292/60543 co-relation queries the response was YES. [2022-07-22 21:49:12,739 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42805 conditions, 10705 events. 5597/10705 cut-off events. For 60292/60543 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 87513 event pairs, 698 based on Foata normal form. 50/10617 useless extension candidates. Maximal degree in co-relation 42766. Up to 1159 conditions per place. [2022-07-22 21:49:12,786 INFO L132 encePairwiseOnDemand]: 139/156 looper letters, 233 selfloop transitions, 237 changer transitions 0/563 dead transitions. [2022-07-22 21:49:12,786 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 563 transitions, 5305 flow [2022-07-22 21:49:12,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 21:49:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-07-22 21:49:12,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2811 transitions. [2022-07-22 21:49:12,789 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.750801282051282 [2022-07-22 21:49:12,789 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2811 transitions. [2022-07-22 21:49:12,789 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2811 transitions. [2022-07-22 21:49:12,790 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:12,790 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2811 transitions. [2022-07-22 21:49:12,793 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 117.125) internal successors, (2811), 24 states have internal predecessors, (2811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:12,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:12,797 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 156.0) internal successors, (3900), 25 states have internal predecessors, (3900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:12,797 INFO L186 Difference]: Start difference. First operand has 215 places, 317 transitions, 2786 flow. Second operand 24 states and 2811 transitions. [2022-07-22 21:49:12,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 563 transitions, 5305 flow [2022-07-22 21:49:13,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 563 transitions, 5187 flow, removed 12 selfloop flow, removed 6 redundant places. [2022-07-22 21:49:13,048 INFO L242 Difference]: Finished difference. Result has 244 places, 418 transitions, 4336 flow [2022-07-22 21:49:13,048 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=2708, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=4336, PETRI_PLACES=244, PETRI_TRANSITIONS=418} [2022-07-22 21:49:13,049 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 104 predicate places. [2022-07-22 21:49:13,049 INFO L495 AbstractCegarLoop]: Abstraction has has 244 places, 418 transitions, 4336 flow [2022-07-22 21:49:13,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 109.8125) internal successors, (1757), 16 states have internal predecessors, (1757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:13,049 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:13,049 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:13,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-07-22 21:49:13,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:13,250 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:49:13,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:13,250 INFO L85 PathProgramCache]: Analyzing trace with hash 767769428, now seen corresponding path program 6 times [2022-07-22 21:49:13,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:13,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579040097] [2022-07-22 21:49:13,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:13,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:13,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:13,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:13,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:13,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579040097] [2022-07-22 21:49:13,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579040097] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:13,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093005023] [2022-07-22 21:49:13,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 21:49:13,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:13,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:13,331 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:49:13,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 21:49:13,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-22 21:49:13,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:49:13,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-22 21:49:13,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:13,552 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:13,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:13,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1093005023] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:13,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:49:13,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10, 9] total 20 [2022-07-22 21:49:13,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116932830] [2022-07-22 21:49:13,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:49:13,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-22 21:49:13,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-22 21:49:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:49:13,721 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 156 [2022-07-22 21:49:13,722 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 244 places, 418 transitions, 4336 flow. Second operand has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:13,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:13,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 156 [2022-07-22 21:49:13,722 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:15,123 INFO L129 PetriNetUnfolder]: 4091/8267 cut-off events. [2022-07-22 21:49:15,124 INFO L130 PetriNetUnfolder]: For 50188/50432 co-relation queries the response was YES. [2022-07-22 21:49:15,174 INFO L84 FinitePrefix]: Finished finitePrefix Result has 34428 conditions, 8267 events. 4091/8267 cut-off events. For 50188/50432 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 68756 event pairs, 510 based on Foata normal form. 35/8138 useless extension candidates. Maximal degree in co-relation 34377. Up to 2583 conditions per place. [2022-07-22 21:49:15,212 INFO L132 encePairwiseOnDemand]: 144/156 looper letters, 129 selfloop transitions, 163 changer transitions 0/451 dead transitions. [2022-07-22 21:49:15,212 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 451 transitions, 5093 flow [2022-07-22 21:49:15,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:49:15,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:49:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1175 transitions. [2022-07-22 21:49:15,214 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7532051282051282 [2022-07-22 21:49:15,214 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1175 transitions. [2022-07-22 21:49:15,215 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1175 transitions. [2022-07-22 21:49:15,215 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:15,215 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1175 transitions. [2022-07-22 21:49:15,216 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 117.5) internal successors, (1175), 10 states have internal predecessors, (1175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:15,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:15,218 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 156.0) internal successors, (1716), 11 states have internal predecessors, (1716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:15,218 INFO L186 Difference]: Start difference. First operand has 244 places, 418 transitions, 4336 flow. Second operand 10 states and 1175 transitions. [2022-07-22 21:49:15,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 451 transitions, 5093 flow [2022-07-22 21:49:15,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 451 transitions, 4966 flow, removed 38 selfloop flow, removed 6 redundant places. [2022-07-22 21:49:15,505 INFO L242 Difference]: Finished difference. Result has 250 places, 421 transitions, 4826 flow [2022-07-22 21:49:15,506 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=4217, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4826, PETRI_PLACES=250, PETRI_TRANSITIONS=421} [2022-07-22 21:49:15,506 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 110 predicate places. [2022-07-22 21:49:15,506 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 421 transitions, 4826 flow [2022-07-22 21:49:15,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 112.33333333333333) internal successors, (1011), 9 states have internal predecessors, (1011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:15,507 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:49:15,507 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:49:15,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-22 21:49:15,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:15,708 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:49:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:49:15,708 INFO L85 PathProgramCache]: Analyzing trace with hash 91891366, now seen corresponding path program 1 times [2022-07-22 21:49:15,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:49:15,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787970783] [2022-07-22 21:49:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:15,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:49:15,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:16,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:49:16,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:49:16,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787970783] [2022-07-22 21:49:16,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787970783] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:49:16,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964130482] [2022-07-22 21:49:16,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:49:16,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:49:16,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:49:16,148 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) [2022-07-22 21:49:16,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 21:49:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:49:16,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 82 conjunts are in the unsatisfiable core [2022-07-22 21:49:16,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:49:16,337 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:49:16,638 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:49:16,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:49:16,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-22 21:49:17,246 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:49:17,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:49:17,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:49:17,683 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:49:17,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 23 [2022-07-22 21:49:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:17,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:49:18,472 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (< (+ ~M~0 1) c_~N~0) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) c_~A~0.base))) (= (+ (select .cse0 c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* ~M~0 4)))))))) is different from false [2022-07-22 21:49:18,570 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_331 (Array Int Int)) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_331) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) c_~A~0.base))) (= (+ c_~res1~0 (select .cse0 c_~A~0.offset)) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* ~M~0 4)))))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-07-22 21:49:18,669 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_331 (Array Int Int)) (v_ArrVal_330 (Array Int Int)) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_330) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_331) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) c_~A~0.base))) (= (+ c_~res1~0 (select .cse0 c_~A~0.offset)) (+ (select .cse0 (+ c_~A~0.offset (* ~M~0 4))) c_~res2~0))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-07-22 21:49:18,775 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_331 (Array Int Int)) (v_ArrVal_330 (Array Int Int)) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_330) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_331) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) |c_ULTIMATE.start_main_#t~ret12#1.base|))) (= (+ (select .cse0 |c_ULTIMATE.start_main_#t~ret12#1.offset|) c_~res1~0) (+ c_~res2~0 (select .cse0 (+ |c_ULTIMATE.start_main_#t~ret12#1.offset| (* ~M~0 4)))))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-07-22 21:49:18,800 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_331 (Array Int Int)) (v_ArrVal_330 (Array Int Int)) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_330) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_331) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|))) (= (+ (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|) c_~res1~0) (+ (select .cse0 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) c_~res2~0))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-07-22 21:49:18,812 WARN L833 $PredicateComparison]: unable to prove that (forall ((~M~0 Int) (v_ArrVal_331 (Array Int Int)) (v_ArrVal_330 (Array Int Int)) (v_ArrVal_332 (Array Int Int))) (or (not (< ~M~0 c_~N~0)) (let ((.cse0 (select (store (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_330) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_331) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_332) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (= (+ (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res1~0) (+ c_~res2~0 (select .cse0 (+ (* ~M~0 4) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (< (+ ~M~0 1) c_~N~0))) is different from false [2022-07-22 21:49:19,056 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:49:19,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 50 [2022-07-22 21:49:19,067 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:49:19,067 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 806 treesize of output 770 [2022-07-22 21:49:19,083 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:49:19,083 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 379 treesize of output 360 [2022-07-22 21:49:19,097 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:49:19,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 726 treesize of output 610 [2022-07-22 21:49:19,113 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:49:19,113 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 598 treesize of output 546 [2022-07-22 21:49:20,266 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 21:49:20,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:49:20,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964130482] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:49:20,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:49:20,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 33, 31] total 75 [2022-07-22 21:49:20,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561252952] [2022-07-22 21:49:20,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:49:20,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-22 21:49:20,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:49:20,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-22 21:49:20,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=647, Invalid=4060, Unknown=9, NotChecked=834, Total=5550 [2022-07-22 21:49:20,283 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 52 out of 156 [2022-07-22 21:49:20,285 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 421 transitions, 4826 flow. Second operand has 75 states, 75 states have (on average 54.72) internal successors, (4104), 75 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:20,286 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:49:20,286 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 52 of 156 [2022-07-22 21:49:20,286 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:49:55,816 INFO L129 PetriNetUnfolder]: 49411/79193 cut-off events. [2022-07-22 21:49:55,816 INFO L130 PetriNetUnfolder]: For 483460/483460 co-relation queries the response was YES. [2022-07-22 21:49:56,821 INFO L84 FinitePrefix]: Finished finitePrefix Result has 315311 conditions, 79193 events. 49411/79193 cut-off events. For 483460/483460 co-relation queries the response was YES. Maximal size of possible extension queue 3591. Compared 707085 event pairs, 6946 based on Foata normal form. 2/78969 useless extension candidates. Maximal degree in co-relation 315258. Up to 36860 conditions per place. [2022-07-22 21:49:57,305 INFO L132 encePairwiseOnDemand]: 104/156 looper letters, 1818 selfloop transitions, 1297 changer transitions 13/3173 dead transitions. [2022-07-22 21:49:57,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 3173 transitions, 41268 flow [2022-07-22 21:49:57,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-22 21:49:57,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2022-07-22 21:49:57,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 7293 transitions. [2022-07-22 21:49:57,314 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.3995726495726496 [2022-07-22 21:49:57,314 INFO L72 ComplementDD]: Start complementDD. Operand 117 states and 7293 transitions. [2022-07-22 21:49:57,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 117 states and 7293 transitions. [2022-07-22 21:49:57,316 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:49:57,316 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 117 states and 7293 transitions. [2022-07-22 21:49:57,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 118 states, 117 states have (on average 62.333333333333336) internal successors, (7293), 117 states have internal predecessors, (7293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:57,340 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 118 states, 118 states have (on average 156.0) internal successors, (18408), 118 states have internal predecessors, (18408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:57,342 INFO L81 ComplementDD]: Finished complementDD. Result has 118 states, 118 states have (on average 156.0) internal successors, (18408), 118 states have internal predecessors, (18408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:49:57,342 INFO L186 Difference]: Start difference. First operand has 250 places, 421 transitions, 4826 flow. Second operand 117 states and 7293 transitions. [2022-07-22 21:49:57,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 3173 transitions, 41268 flow [2022-07-22 21:50:07,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 3173 transitions, 40521 flow, removed 106 selfloop flow, removed 7 redundant places. [2022-07-22 21:50:07,775 INFO L242 Difference]: Finished difference. Result has 437 places, 1915 transitions, 24773 flow [2022-07-22 21:50:07,776 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=156, PETRI_DIFFERENCE_MINUEND_FLOW=4698, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=117, PETRI_FLOW=24773, PETRI_PLACES=437, PETRI_TRANSITIONS=1915} [2022-07-22 21:50:07,777 INFO L279 CegarLoopForPetriNet]: 140 programPoint places, 297 predicate places. [2022-07-22 21:50:07,777 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 1915 transitions, 24773 flow [2022-07-22 21:50:07,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 54.72) internal successors, (4104), 75 states have internal predecessors, (4104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:07,778 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:50:07,778 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:50:07,803 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 21:50:07,997 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,SelfDestructingSolverStorable12 [2022-07-22 21:50:07,998 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2022-07-22 21:50:07,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:50:07,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1068845516, now seen corresponding path program 1 times [2022-07-22 21:50:07,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:50:07,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091413440] [2022-07-22 21:50:07,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:50:07,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:50:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:50:08,401 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:50:08,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:50:08,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091413440] [2022-07-22 21:50:08,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091413440] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:50:08,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986839492] [2022-07-22 21:50:08,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:50:08,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:50:08,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:50:08,403 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) [2022-07-22 21:50:08,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 21:50:08,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:50:08,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-22 21:50:08,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:50:08,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:50:08,560 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-22 21:50:08,561 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-22 21:50:08,609 INFO L356 Elim1Store]: treesize reduction 28, result has 40.4 percent of original size [2022-07-22 21:50:08,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 17 treesize of output 30 [2022-07-22 21:50:08,965 INFO L356 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2022-07-22 21:50:08,965 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 34 [2022-07-22 21:50:09,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:50:09,351 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:50:09,453 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:50:09,610 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:50:09,610 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2022-07-22 21:50:09,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 11 [2022-07-22 21:50:09,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:50:09,715 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:50:09,791 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_372 (Array Int Int))) (= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset) c_~res2~0))) is different from false [2022-07-22 21:50:09,819 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_372 (Array Int Int))) (= |c_thread1Thread1of1ForFork0_~tmp~0#1| (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset) c_~res2~0))) is different from false [2022-07-22 21:50:09,825 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_372 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4))) c_~res1~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset) c_~res2~0))) is different from false [2022-07-22 21:50:09,837 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ c_~res1~0 (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset (* |c_thread1Thread1of1ForFork0_~i~0#1| 4)))) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset) c_~res2~0)))) is different from false [2022-07-22 21:50:09,842 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ c_~res1~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset) c_~res2~0)))) is different from false [2022-07-22 21:50:09,858 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_370 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_370) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) c_~A~0.base) c_~A~0.offset))))) is different from false [2022-07-22 21:50:09,888 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_370 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_370) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ (select (select .cse0 |c_ULTIMATE.start_main_#t~ret12#1.base|) |c_ULTIMATE.start_main_#t~ret12#1.offset|) c_~res1~0) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) |c_ULTIMATE.start_main_#t~ret12#1.base|) |c_ULTIMATE.start_main_#t~ret12#1.offset|))))) is different from false [2022-07-22 21:50:09,896 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_370 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_370) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|)) (+ c_~res1~0 (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#res#1.base|) |c_ULTIMATE.start_create_fresh_int_array_#res#1.offset|))))) is different from false [2022-07-22 21:50:09,902 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_371 (Array Int Int)) (v_ArrVal_370 (Array Int Int)) (v_ArrVal_372 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_370) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_371))) (= (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res1~0) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_372) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) is different from false [2022-07-22 21:50:09,920 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:50:09,920 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 43 [2022-07-22 21:50:09,924 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2774 treesize of output 2582 [2022-07-22 21:50:09,936 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2582 treesize of output 2454 [2022-07-22 21:50:09,947 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2454 treesize of output 2262 [2022-07-22 21:50:09,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 2262 treesize of output 2166 [2022-07-22 21:50:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2022-07-22 21:50:47,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986839492] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:50:47,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:50:47,197 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 22] total 52 [2022-07-22 21:50:47,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135313472] [2022-07-22 21:50:47,197 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:50:47,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 21:50:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:50:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 21:50:47,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=1615, Unknown=9, NotChecked=810, Total=2652 [2022-07-22 21:50:47,200 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 156 [2022-07-22 21:50:47,202 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 1915 transitions, 24773 flow. Second operand has 52 states, 52 states have (on average 68.15384615384616) internal successors, (3544), 52 states have internal predecessors, (3544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:50:47,202 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:50:47,202 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 156 [2022-07-22 21:50:47,203 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand