./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d 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 ../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.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 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 13:32:02,882 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 13:32:02,884 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 13:32:02,929 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 13:32:02,932 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 13:32:02,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 13:32:02,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 13:32:02,940 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 13:32:02,943 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 13:32:02,947 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 13:32:02,948 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 13:32:02,951 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 13:32:02,951 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 13:32:02,953 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 13:32:02,955 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 13:32:02,962 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 13:32:02,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 13:32:02,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 13:32:02,968 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 13:32:02,972 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 13:32:02,976 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 13:32:02,977 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 13:32:02,978 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 13:32:02,979 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 13:32:02,986 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 13:32:02,988 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 13:32:02,988 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 13:32:02,990 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 13:32:02,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 13:32:02,991 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 13:32:02,991 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 13:32:02,997 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 13:32:02,997 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 13:32:02,998 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 13:32:02,999 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 13:32:02,999 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 13:32:02,999 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 13:32:03,000 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 13:32:03,000 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 13:32:03,001 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 13:32:03,001 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 13:32:03,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 13:32:03,040 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 13:32:03,040 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 13:32:03,041 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 13:32:03,042 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 13:32:03,042 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 13:32:03,043 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 13:32:03,043 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 13:32:03,043 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 13:32:03,044 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 13:32:03,044 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 13:32:03,045 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 13:32:03,045 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 13:32:03,045 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 13:32:03,045 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 13:32:03,045 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 13:32:03,046 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 13:32:03,046 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 13:32:03,046 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 13:32:03,046 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 13:32:03,046 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 13:32:03,047 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 13:32:03,047 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 13:32:03,047 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 13:32:03,047 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 13:32:03,047 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:32:03,048 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 13:32:03,048 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 13:32:03,048 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 13:32:03,048 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 13:32:03,048 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 13:32:03,049 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 13:32:03,049 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 13:32:03,049 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 13:32:03,049 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 13:32:03,050 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 13:32:03,050 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 24c46cfa0dbb54d68ea1c1d9e6e82d14a582b1d00782b6decedd8126f489ee67 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 13:32:03,358 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 13:32:03,373 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 13:32:03,376 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 13:32:03,378 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 13:32:03,378 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 13:32:03,380 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-09-01 13:32:04,471 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 13:32:04,712 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 13:32:04,712 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c [2023-09-01 13:32:04,718 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78e88224/a722b955df5246e1a6262f42ac92df3e/FLAG14001e2b2 [2023-09-01 13:32:04,730 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c78e88224/a722b955df5246e1a6262f42ac92df3e [2023-09-01 13:32:04,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 13:32:04,733 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 13:32:04,734 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 13:32:04,734 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 13:32:04,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 13:32:04,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:04,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43f96c78 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04, skipping insertion in model container [2023-09-01 13:32:04,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:04,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 13:32:04,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 13:32:04,899 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2023-09-01 13:32:04,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:32:04,917 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 13:32:04,937 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-min-max-inc.wvr.c[3018,3031] [2023-09-01 13:32:04,940 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 13:32:04,948 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:32:04,948 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 13:32:04,955 INFO L208 MainTranslator]: Completed translation [2023-09-01 13:32:04,955 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04 WrapperNode [2023-09-01 13:32:04,956 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 13:32:04,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 13:32:04,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 13:32:04,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 13:32:04,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:04,985 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:05,020 INFO L138 Inliner]: procedures = 26, calls = 63, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 139 [2023-09-01 13:32:05,020 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 13:32:05,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 13:32:05,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 13:32:05,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 13:32:05,030 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:05,031 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:05,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:05,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:05,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:05,071 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:05,074 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:05,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:05,088 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 13:32:05,089 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 13:32:05,089 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 13:32:05,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 13:32:05,090 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (1/1) ... [2023-09-01 13:32:05,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 13:32:05,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:32:05,130 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 13:32:05,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 13:32:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 13:32:05,169 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 13:32:05,170 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 13:32:05,170 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 13:32:05,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 13:32:05,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 13:32:05,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 13:32:05,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 13:32:05,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 13:32:05,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 13:32:05,171 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-09-01 13:32:05,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-09-01 13:32:05,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 13:32:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 13:32:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 13:32:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 13:32:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 13:32:05,172 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 13:32:05,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 13:32:05,174 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 13:32:05,284 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 13:32:05,288 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 13:32:05,639 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 13:32:05,752 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 13:32:05,752 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-09-01 13:32:05,754 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:32:05 BoogieIcfgContainer [2023-09-01 13:32:05,754 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 13:32:05,756 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 13:32:05,756 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 13:32:05,771 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 13:32:05,773 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 01:32:04" (1/3) ... [2023-09-01 13:32:05,773 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1becc87a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:32:05, skipping insertion in model container [2023-09-01 13:32:05,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 01:32:04" (2/3) ... [2023-09-01 13:32:05,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1becc87a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 01:32:05, skipping insertion in model container [2023-09-01 13:32:05,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 01:32:05" (3/3) ... [2023-09-01 13:32:05,776 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2023-09-01 13:32:05,783 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 13:32:05,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 13:32:05,793 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 13:32:05,793 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 13:32:05,911 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2023-09-01 13:32:05,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 162 transitions, 356 flow [2023-09-01 13:32:06,071 INFO L130 PetriNetUnfolder]: 12/158 cut-off events. [2023-09-01 13:32:06,078 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 13:32:06,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175 conditions, 158 events. 12/158 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 115 event pairs, 0 based on Foata normal form. 0/145 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2023-09-01 13:32:06,084 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 162 transitions, 356 flow [2023-09-01 13:32:06,092 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 146 transitions, 316 flow [2023-09-01 13:32:06,096 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 13:32:06,113 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 146 transitions, 316 flow [2023-09-01 13:32:06,118 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 146 transitions, 316 flow [2023-09-01 13:32:06,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 146 transitions, 316 flow [2023-09-01 13:32:06,173 INFO L130 PetriNetUnfolder]: 12/146 cut-off events. [2023-09-01 13:32:06,178 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 13:32:06,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 163 conditions, 146 events. 12/146 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 114 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 126. Up to 2 conditions per place. [2023-09-01 13:32:06,184 INFO L119 LiptonReduction]: Number of co-enabled transitions 2280 [2023-09-01 13:32:11,175 INFO L134 LiptonReduction]: Checked pairs total: 3482 [2023-09-01 13:32:11,176 INFO L136 LiptonReduction]: Total number of compositions: 134 [2023-09-01 13:32:11,195 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 13:32:11,204 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@ce6aca0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 13:32:11,204 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-09-01 13:32:11,220 INFO L130 PetriNetUnfolder]: 4/30 cut-off events. [2023-09-01 13:32:11,221 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2023-09-01 13:32:11,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:32:11,222 INFO L208 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] [2023-09-01 13:32:11,223 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 2 more)] === [2023-09-01 13:32:11,227 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:32:11,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1385427649, now seen corresponding path program 1 times [2023-09-01 13:32:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:32:11,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623946042] [2023-09-01 13:32:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:11,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:32:11,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:32:11,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:32:11,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623946042] [2023-09-01 13:32:11,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623946042] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:32:11,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:32:11,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:32:11,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939207671] [2023-09-01 13:32:11,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:32:11,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:32:11,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:32:11,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:32:11,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:32:11,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 296 [2023-09-01 13:32:11,761 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 86 flow. Second operand has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:11,762 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:32:11,762 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 296 [2023-09-01 13:32:11,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:32:12,049 INFO L130 PetriNetUnfolder]: 1420/1898 cut-off events. [2023-09-01 13:32:12,050 INFO L131 PetriNetUnfolder]: For 113/113 co-relation queries the response was YES. [2023-09-01 13:32:12,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3999 conditions, 1898 events. 1420/1898 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 7098 event pairs, 765 based on Foata normal form. 0/1421 useless extension candidates. Maximal degree in co-relation 3498. Up to 1552 conditions per place. [2023-09-01 13:32:12,067 INFO L137 encePairwiseOnDemand]: 292/296 looper letters, 42 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-09-01 13:32:12,067 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 46 transitions, 215 flow [2023-09-01 13:32:12,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:32:12,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:32:12,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 586 transitions. [2023-09-01 13:32:12,089 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49493243243243246 [2023-09-01 13:32:12,090 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 586 transitions. [2023-09-01 13:32:12,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 586 transitions. [2023-09-01 13:32:12,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:32:12,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 586 transitions. [2023-09-01 13:32:12,102 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.5) internal successors, (586), 4 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:12,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:12,111 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:12,113 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 86 flow. Second operand 4 states and 586 transitions. [2023-09-01 13:32:12,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 46 transitions, 215 flow [2023-09-01 13:32:12,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 46 transitions, 193 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-09-01 13:32:12,121 INFO L231 Difference]: Finished difference. Result has 36 places, 32 transitions, 84 flow [2023-09-01 13:32:12,123 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=36, PETRI_TRANSITIONS=32} [2023-09-01 13:32:12,126 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2023-09-01 13:32:12,126 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 32 transitions, 84 flow [2023-09-01 13:32:12,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 141.5) internal successors, (566), 4 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:12,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:32:12,127 INFO L208 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] [2023-09-01 13:32:12,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 13:32:12,128 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 2 more)] === [2023-09-01 13:32:12,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:32:12,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1622835390, now seen corresponding path program 1 times [2023-09-01 13:32:12,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:32:12,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894826043] [2023-09-01 13:32:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:12,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:32:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:12,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:32:12,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:32:12,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894826043] [2023-09-01 13:32:12,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894826043] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:32:12,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:32:12,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:32:12,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735235345] [2023-09-01 13:32:12,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:32:12,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:32:12,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:32:12,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:32:12,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:32:12,285 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 296 [2023-09-01 13:32:12,287 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:12,287 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:32:12,287 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 296 [2023-09-01 13:32:12,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:32:12,524 INFO L130 PetriNetUnfolder]: 1718/2336 cut-off events. [2023-09-01 13:32:12,524 INFO L131 PetriNetUnfolder]: For 549/549 co-relation queries the response was YES. [2023-09-01 13:32:12,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5313 conditions, 2336 events. 1718/2336 cut-off events. For 549/549 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 8125 event pairs, 977 based on Foata normal form. 0/1943 useless extension candidates. Maximal degree in co-relation 2424. Up to 1790 conditions per place. [2023-09-01 13:32:12,536 INFO L137 encePairwiseOnDemand]: 292/296 looper letters, 47 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-09-01 13:32:12,537 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 50 transitions, 233 flow [2023-09-01 13:32:12,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:32:12,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:32:12,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 589 transitions. [2023-09-01 13:32:12,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49746621621621623 [2023-09-01 13:32:12,540 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 589 transitions. [2023-09-01 13:32:12,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 589 transitions. [2023-09-01 13:32:12,540 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:32:12,540 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 589 transitions. [2023-09-01 13:32:12,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.25) internal successors, (589), 4 states have internal predecessors, (589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:12,544 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:12,544 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:12,545 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 84 flow. Second operand 4 states and 589 transitions. [2023-09-01 13:32:12,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 50 transitions, 233 flow [2023-09-01 13:32:12,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 50 transitions, 223 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 13:32:12,548 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 92 flow [2023-09-01 13:32:12,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-09-01 13:32:12,550 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, -2 predicate places. [2023-09-01 13:32:12,550 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 92 flow [2023-09-01 13:32:12,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:12,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:32:12,551 INFO L208 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] [2023-09-01 13:32:12,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 13:32:12,552 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 2 more)] === [2023-09-01 13:32:12,552 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:32:12,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1337805984, now seen corresponding path program 1 times [2023-09-01 13:32:12,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:32:12,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977555944] [2023-09-01 13:32:12,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:12,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:32:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:12,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:32:12,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:32:12,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977555944] [2023-09-01 13:32:12,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977555944] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:32:12,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:32:12,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 13:32:12,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251756694] [2023-09-01 13:32:12,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:32:12,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:32:12,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:32:12,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:32:12,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:32:12,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 296 [2023-09-01 13:32:12,751 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:12,752 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:32:12,752 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 296 [2023-09-01 13:32:12,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:32:12,989 INFO L130 PetriNetUnfolder]: 1632/2232 cut-off events. [2023-09-01 13:32:12,990 INFO L131 PetriNetUnfolder]: For 545/694 co-relation queries the response was YES. [2023-09-01 13:32:12,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5578 conditions, 2232 events. 1632/2232 cut-off events. For 545/694 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8389 event pairs, 977 based on Foata normal form. 149/1982 useless extension candidates. Maximal degree in co-relation 1672. Up to 1790 conditions per place. [2023-09-01 13:32:13,002 INFO L137 encePairwiseOnDemand]: 292/296 looper letters, 46 selfloop transitions, 3 changer transitions 0/50 dead transitions. [2023-09-01 13:32:13,002 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 50 transitions, 240 flow [2023-09-01 13:32:13,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 13:32:13,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 13:32:13,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 586 transitions. [2023-09-01 13:32:13,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49493243243243246 [2023-09-01 13:32:13,005 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 586 transitions. [2023-09-01 13:32:13,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 586 transitions. [2023-09-01 13:32:13,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:32:13,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 586 transitions. [2023-09-01 13:32:13,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 146.5) internal successors, (586), 4 states have internal predecessors, (586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:13,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:13,010 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 296.0) internal successors, (1480), 5 states have internal predecessors, (1480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:13,010 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 92 flow. Second operand 4 states and 586 transitions. [2023-09-01 13:32:13,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 50 transitions, 240 flow [2023-09-01 13:32:13,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 50 transitions, 231 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-09-01 13:32:13,012 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 100 flow [2023-09-01 13:32:13,012 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=100, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2023-09-01 13:32:13,013 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2023-09-01 13:32:13,013 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 100 flow [2023-09-01 13:32:13,013 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 142.0) internal successors, (568), 4 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:13,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:32:13,014 INFO L208 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] [2023-09-01 13:32:13,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 13:32:13,014 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 2 more)] === [2023-09-01 13:32:13,014 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:32:13,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1347991008, now seen corresponding path program 1 times [2023-09-01 13:32:13,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:32:13,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412264853] [2023-09-01 13:32:13,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:13,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:32:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-09-01 13:32:13,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:32:13,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412264853] [2023-09-01 13:32:13,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412264853] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:32:13,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:32:13,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:32:13,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423264263] [2023-09-01 13:32:13,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:32:13,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 13:32:13,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:32:13,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 13:32:13,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 13:32:13,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 134 out of 296 [2023-09-01 13:32:13,163 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 100 flow. Second operand has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:13,163 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:32:13,163 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 134 of 296 [2023-09-01 13:32:13,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:32:13,372 INFO L130 PetriNetUnfolder]: 1632/2233 cut-off events. [2023-09-01 13:32:13,372 INFO L131 PetriNetUnfolder]: For 878/1027 co-relation queries the response was YES. [2023-09-01 13:32:13,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5793 conditions, 2233 events. 1632/2233 cut-off events. For 878/1027 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 8188 event pairs, 1243 based on Foata normal form. 149/1978 useless extension candidates. Maximal degree in co-relation 1883. Up to 2223 conditions per place. [2023-09-01 13:32:13,385 INFO L137 encePairwiseOnDemand]: 293/296 looper letters, 32 selfloop transitions, 2 changer transitions 0/35 dead transitions. [2023-09-01 13:32:13,385 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 170 flow [2023-09-01 13:32:13,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 13:32:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 13:32:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 434 transitions. [2023-09-01 13:32:13,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48873873873873874 [2023-09-01 13:32:13,390 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 434 transitions. [2023-09-01 13:32:13,390 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 434 transitions. [2023-09-01 13:32:13,390 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:32:13,390 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 434 transitions. [2023-09-01 13:32:13,391 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 144.66666666666666) internal successors, (434), 3 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:13,393 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:13,393 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 296.0) internal successors, (1184), 4 states have internal predecessors, (1184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:13,393 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 100 flow. Second operand 3 states and 434 transitions. [2023-09-01 13:32:13,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 170 flow [2023-09-01 13:32:13,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 35 transitions, 164 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-09-01 13:32:13,396 INFO L231 Difference]: Finished difference. Result has 41 places, 35 transitions, 106 flow [2023-09-01 13:32:13,396 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=41, PETRI_TRANSITIONS=35} [2023-09-01 13:32:13,397 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2023-09-01 13:32:13,397 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 35 transitions, 106 flow [2023-09-01 13:32:13,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.66666666666666) internal successors, (431), 3 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:13,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:32:13,398 INFO L208 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] [2023-09-01 13:32:13,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 13:32:13,398 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 2 more)] === [2023-09-01 13:32:13,398 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:32:13,398 INFO L85 PathProgramCache]: Analyzing trace with hash -406219004, now seen corresponding path program 1 times [2023-09-01 13:32:13,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:32:13,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209225607] [2023-09-01 13:32:13,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:13,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:32:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:14,078 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:32:14,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:32:14,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209225607] [2023-09-01 13:32:14,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209225607] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:32:14,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469477066] [2023-09-01 13:32:14,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:14,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:32:14,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:32:14,085 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:32:14,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 13:32:14,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:14,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 49 conjunts are in the unsatisfiable core [2023-09-01 13:32:14,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:32:14,367 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-09-01 13:32:14,440 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 13:32:14,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:32:14,526 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 13:32:14,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:32:14,624 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 13:32:14,760 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 42 treesize of output 22 [2023-09-01 13:32:14,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:32:14,848 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-09-01 13:32:14,911 INFO L350 Elim1Store]: Elim1 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 43 treesize of output 27 [2023-09-01 13:32:14,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 13:32:14,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:32:17,746 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| c_~A~0.base))) (let ((.cse0 (select .cse2 c_~A~0.offset))) (or (<= 2147483647 .cse0) (forall ((v_ArrVal_186 Int) (v_ArrVal_188 (Array Int Int))) (let ((.cse1 (select (select (store (store |c_#memory_int| c_~A~0.base (store .cse2 c_~A~0.offset v_ArrVal_186)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_188) c_~A~0.base) c_~A~0.offset))) (or (< v_ArrVal_186 (+ .cse0 1)) (<= 2147483647 .cse1) (<= c_~min~0 (+ .cse1 1)))))))) is different from false [2023-09-01 13:32:17,770 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_186 Int) (v_ArrVal_185 (Array Int Int)) (v_ArrVal_188 (Array Int Int))) (let ((.cse2 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_185))) (let ((.cse3 (select .cse2 c_~A~0.base))) (let ((.cse0 (select .cse3 c_~A~0.offset)) (.cse1 (select (select (store (store .cse2 c_~A~0.base (store .cse3 c_~A~0.offset v_ArrVal_186)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_188) c_~A~0.base) c_~A~0.offset))) (or (< v_ArrVal_186 (+ .cse0 1)) (<= 2147483647 .cse0) (<= c_~min~0 (+ .cse1 1)) (<= 2147483647 .cse1)))))) is different from false [2023-09-01 13:32:18,261 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_184 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_184))) (or (<= (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~min~0) (forall ((v_ArrVal_186 Int) (v_ArrVal_185 (Array Int Int)) (v_ArrVal_188 (Array Int Int))) (let ((.cse4 (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_185))) (let ((.cse3 (select .cse4 c_~A~0.base))) (let ((.cse2 (select (select (store (store .cse4 c_~A~0.base (store .cse3 c_~A~0.offset v_ArrVal_186)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_188) c_~A~0.base) c_~A~0.offset)) (.cse1 (select .cse3 c_~A~0.offset))) (or (< v_ArrVal_186 (+ .cse1 1)) (<= 2147483647 .cse2) (<= c_~min~0 (+ .cse2 1)) (<= 2147483647 .cse1))))))))) (forall ((v_ArrVal_184 (Array Int Int))) (let ((.cse10 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_184))) (let ((.cse5 (select (select .cse10 c_~A~0.base) c_~A~0.offset))) (or (< c_~min~0 .cse5) (forall ((v_ArrVal_186 Int) (v_ArrVal_185 (Array Int Int)) (v_ArrVal_188 (Array Int Int))) (let ((.cse9 (store .cse10 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_185))) (let ((.cse8 (select .cse9 c_~A~0.base))) (let ((.cse7 (select (select (store (store .cse9 c_~A~0.base (store .cse8 c_~A~0.offset v_ArrVal_186)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_188) c_~A~0.base) c_~A~0.offset)) (.cse6 (select .cse8 c_~A~0.offset))) (or (< v_ArrVal_186 (+ .cse6 1)) (<= 2147483647 .cse7) (<= .cse5 (+ .cse7 1)) (<= 2147483647 .cse6))))))))))) is different from false [2023-09-01 13:32:18,358 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse6 (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset))) (and (forall ((v_ArrVal_184 (Array Int Int))) (let ((.cse5 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_184))) (let ((.cse2 (select (select .cse5 c_~A~0.base) c_~A~0.offset))) (or (forall ((v_ArrVal_186 Int) (v_ArrVal_185 (Array Int Int)) (v_ArrVal_188 (Array Int Int))) (let ((.cse4 (store .cse5 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_185))) (let ((.cse3 (select .cse4 c_~A~0.base))) (let ((.cse1 (select (select (store (store .cse4 c_~A~0.base (store .cse3 c_~A~0.offset v_ArrVal_186)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_188) c_~A~0.base) c_~A~0.offset)) (.cse0 (select .cse3 c_~A~0.offset))) (or (< v_ArrVal_186 (+ .cse0 1)) (<= 2147483647 .cse1) (<= .cse2 (+ .cse1 1)) (<= 2147483647 .cse0)))))) (< .cse6 .cse2))))) (forall ((v_ArrVal_184 (Array Int Int))) (let ((.cse7 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_184))) (or (<= (select (select .cse7 c_~A~0.base) c_~A~0.offset) .cse6) (forall ((v_ArrVal_186 Int) (v_ArrVal_185 (Array Int Int)) (v_ArrVal_188 (Array Int Int))) (let ((.cse11 (store .cse7 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_185))) (let ((.cse10 (select .cse11 c_~A~0.base))) (let ((.cse9 (select (select (store (store .cse11 c_~A~0.base (store .cse10 c_~A~0.offset v_ArrVal_186)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_188) c_~A~0.base) c_~A~0.offset)) (.cse8 (select .cse10 c_~A~0.offset))) (or (< v_ArrVal_186 (+ .cse8 1)) (<= .cse6 (+ .cse9 1)) (<= 2147483647 .cse9) (<= 2147483647 .cse8))))))))))) is different from false [2023-09-01 13:32:18,512 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_184 (Array Int Int)) (v_ArrVal_183 (Array Int Int))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_183))) (let ((.cse1 (select (select .cse6 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse0 (store .cse6 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_184))) (or (<= (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|) .cse1) (forall ((v_ArrVal_186 Int) (v_ArrVal_185 (Array Int Int)) (v_ArrVal_188 (Array Int Int))) (let ((.cse4 (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_185))) (let ((.cse5 (select .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse2 (select .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse3 (select (select (store (store .cse4 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse5 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| v_ArrVal_186)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_188) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< v_ArrVal_186 (+ .cse2 1)) (<= 2147483647 .cse3) (<= 2147483647 .cse2) (<= .cse1 (+ .cse3 1))))))))))) (forall ((v_ArrVal_184 (Array Int Int)) (v_ArrVal_183 (Array Int Int))) (let ((.cse13 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_183))) (let ((.cse12 (store .cse13 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_184))) (let ((.cse9 (select (select .cse12 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (forall ((v_ArrVal_186 Int) (v_ArrVal_185 (Array Int Int)) (v_ArrVal_188 (Array Int Int))) (let ((.cse10 (store .cse12 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_185))) (let ((.cse11 (select .cse10 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|))) (let ((.cse7 (select .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (.cse8 (select (select (store (store .cse10 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store .cse11 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| v_ArrVal_186)) |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_188) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))) (or (< v_ArrVal_186 (+ .cse7 1)) (<= 2147483647 .cse8) (<= 2147483647 .cse7) (<= .cse9 (+ .cse8 1))))))) (< (select (select .cse13 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) .cse9))))))) is different from false [2023-09-01 13:32:18,561 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 13:32:18,561 INFO L350 Elim1Store]: Elim1 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 247 treesize of output 151 [2023-09-01 13:32:18,583 INFO L350 Elim1Store]: Elim1 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 6735 treesize of output 6431 [2023-09-01 13:32:18,693 INFO L350 Elim1Store]: Elim1 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 411 treesize of output 383 [2023-09-01 13:32:18,716 INFO L350 Elim1Store]: Elim1 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 467 treesize of output 435 [2023-09-01 13:32:18,744 INFO L350 Elim1Store]: Elim1 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 356 treesize of output 342 [2023-09-01 13:32:18,766 INFO L350 Elim1Store]: Elim1 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 117 treesize of output 101 [2023-09-01 13:32:19,877 INFO L321 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-09-01 13:32:19,877 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 244 treesize of output 1 [2023-09-01 13:32:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-09-01 13:32:19,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469477066] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:32:19,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:32:19,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 15] total 38 [2023-09-01 13:32:19,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392617124] [2023-09-01 13:32:19,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:32:19,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-09-01 13:32:19,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:32:19,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-09-01 13:32:19,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=1004, Unknown=30, NotChecked=350, Total=1560 [2023-09-01 13:32:19,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 296 [2023-09-01 13:32:19,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 35 transitions, 106 flow. Second operand has 40 states, 40 states have (on average 84.325) internal successors, (3373), 40 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:19,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:32:19,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 296 [2023-09-01 13:32:19,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:32:26,773 INFO L130 PetriNetUnfolder]: 11330/15592 cut-off events. [2023-09-01 13:32:26,773 INFO L131 PetriNetUnfolder]: For 4161/4161 co-relation queries the response was YES. [2023-09-01 13:32:26,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40013 conditions, 15592 events. 11330/15592 cut-off events. For 4161/4161 co-relation queries the response was YES. Maximal size of possible extension queue 570. Compared 80468 event pairs, 163 based on Foata normal form. 7/12538 useless extension candidates. Maximal degree in co-relation 39999. Up to 3235 conditions per place. [2023-09-01 13:32:26,838 INFO L137 encePairwiseOnDemand]: 284/296 looper letters, 250 selfloop transitions, 67 changer transitions 314/631 dead transitions. [2023-09-01 13:32:26,838 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 631 transitions, 3144 flow [2023-09-01 13:32:26,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-09-01 13:32:26,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2023-09-01 13:32:26,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 4272 transitions. [2023-09-01 13:32:26,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3207207207207207 [2023-09-01 13:32:26,853 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 4272 transitions. [2023-09-01 13:32:26,853 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 4272 transitions. [2023-09-01 13:32:26,855 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:32:26,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 4272 transitions. [2023-09-01 13:32:26,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 94.93333333333334) internal successors, (4272), 45 states have internal predecessors, (4272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:26,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 296.0) internal successors, (13616), 46 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:26,887 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 296.0) internal successors, (13616), 46 states have internal predecessors, (13616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:26,887 INFO L175 Difference]: Start difference. First operand has 41 places, 35 transitions, 106 flow. Second operand 45 states and 4272 transitions. [2023-09-01 13:32:26,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 631 transitions, 3144 flow [2023-09-01 13:32:26,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 631 transitions, 3140 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-09-01 13:32:26,975 INFO L231 Difference]: Finished difference. Result has 115 places, 123 transitions, 762 flow [2023-09-01 13:32:26,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=762, PETRI_PLACES=115, PETRI_TRANSITIONS=123} [2023-09-01 13:32:26,978 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 75 predicate places. [2023-09-01 13:32:26,978 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 123 transitions, 762 flow [2023-09-01 13:32:26,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 84.325) internal successors, (3373), 40 states have internal predecessors, (3373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:26,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:32:26,980 INFO L208 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] [2023-09-01 13:32:26,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 13:32:27,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:32:27,189 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 2 more)] === [2023-09-01 13:32:27,190 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:32:27,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1897529506, now seen corresponding path program 2 times [2023-09-01 13:32:27,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:32:27,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158186093] [2023-09-01 13:32:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:27,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:32:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:32:27,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:32:27,585 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158186093] [2023-09-01 13:32:27,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158186093] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:32:27,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:32:27,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:32:27,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101229618] [2023-09-01 13:32:27,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:32:27,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:32:27,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:32:27,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:32:27,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:32:27,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 296 [2023-09-01 13:32:27,600 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 123 transitions, 762 flow. Second operand has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:27,600 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:32:27,600 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 296 [2023-09-01 13:32:27,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:32:28,819 INFO L130 PetriNetUnfolder]: 8032/11272 cut-off events. [2023-09-01 13:32:28,819 INFO L131 PetriNetUnfolder]: For 93814/95153 co-relation queries the response was YES. [2023-09-01 13:32:28,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48287 conditions, 11272 events. 8032/11272 cut-off events. For 93814/95153 co-relation queries the response was YES. Maximal size of possible extension queue 464. Compared 58739 event pairs, 1242 based on Foata normal form. 1109/11520 useless extension candidates. Maximal degree in co-relation 48236. Up to 6597 conditions per place. [2023-09-01 13:32:28,898 INFO L137 encePairwiseOnDemand]: 292/296 looper letters, 95 selfloop transitions, 5 changer transitions 208/309 dead transitions. [2023-09-01 13:32:28,899 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 309 transitions, 2548 flow [2023-09-01 13:32:28,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:32:28,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:32:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 752 transitions. [2023-09-01 13:32:28,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5081081081081081 [2023-09-01 13:32:28,902 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 752 transitions. [2023-09-01 13:32:28,902 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 752 transitions. [2023-09-01 13:32:28,902 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:32:28,903 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 752 transitions. [2023-09-01 13:32:28,904 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 150.4) internal successors, (752), 5 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:28,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:28,907 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:28,907 INFO L175 Difference]: Start difference. First operand has 115 places, 123 transitions, 762 flow. Second operand 5 states and 752 transitions. [2023-09-01 13:32:28,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 309 transitions, 2548 flow [2023-09-01 13:32:29,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 309 transitions, 2475 flow, removed 35 selfloop flow, removed 14 redundant places. [2023-09-01 13:32:29,091 INFO L231 Difference]: Finished difference. Result has 86 places, 77 transitions, 446 flow [2023-09-01 13:32:29,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=446, PETRI_PLACES=86, PETRI_TRANSITIONS=77} [2023-09-01 13:32:29,092 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 46 predicate places. [2023-09-01 13:32:29,092 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 77 transitions, 446 flow [2023-09-01 13:32:29,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:29,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:32:29,093 INFO L208 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] [2023-09-01 13:32:29,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 13:32:29,093 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 2 more)] === [2023-09-01 13:32:29,094 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:32:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash 701964876, now seen corresponding path program 3 times [2023-09-01 13:32:29,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:32:29,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953666906] [2023-09-01 13:32:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:29,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:32:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:32:29,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:32:29,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953666906] [2023-09-01 13:32:29,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953666906] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:32:29,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14792710] [2023-09-01 13:32:29,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:32:29,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:32:29,401 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:32:29,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:32:29,414 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 13:32:29,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-09-01 13:32:29,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:32:29,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 22 conjunts are in the unsatisfiable core [2023-09-01 13:32:29,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:32:29,660 INFO L350 Elim1Store]: Elim1 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 11 treesize of output 7 [2023-09-01 13:32:29,709 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2023-09-01 13:32:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:32:29,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:32:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:32:30,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14792710] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 13:32:30,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 13:32:30,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 7] total 16 [2023-09-01 13:32:30,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944467771] [2023-09-01 13:32:30,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:32:30,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-09-01 13:32:30,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:32:30,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-09-01 13:32:30,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2023-09-01 13:32:30,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 296 [2023-09-01 13:32:30,152 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 77 transitions, 446 flow. Second operand has 7 states, 7 states have (on average 131.28571428571428) internal successors, (919), 7 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:30,152 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:32:30,152 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 296 [2023-09-01 13:32:30,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:32:31,626 INFO L130 PetriNetUnfolder]: 9804/13754 cut-off events. [2023-09-01 13:32:31,626 INFO L131 PetriNetUnfolder]: For 135224/137230 co-relation queries the response was YES. [2023-09-01 13:32:31,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60048 conditions, 13754 events. 9804/13754 cut-off events. For 135224/137230 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 74070 event pairs, 1623 based on Foata normal form. 1582/14080 useless extension candidates. Maximal degree in co-relation 60007. Up to 4717 conditions per place. [2023-09-01 13:32:31,706 INFO L137 encePairwiseOnDemand]: 288/296 looper letters, 124 selfloop transitions, 13 changer transitions 170/308 dead transitions. [2023-09-01 13:32:31,706 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 308 transitions, 2376 flow [2023-09-01 13:32:31,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 13:32:31,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 13:32:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 1006 transitions. [2023-09-01 13:32:31,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4855212355212355 [2023-09-01 13:32:31,710 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 1006 transitions. [2023-09-01 13:32:31,710 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 1006 transitions. [2023-09-01 13:32:31,711 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:32:31,711 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 1006 transitions. [2023-09-01 13:32:31,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 143.71428571428572) internal successors, (1006), 7 states have internal predecessors, (1006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:31,716 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 296.0) internal successors, (2368), 8 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:31,717 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 296.0) internal successors, (2368), 8 states have internal predecessors, (2368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:31,717 INFO L175 Difference]: Start difference. First operand has 86 places, 77 transitions, 446 flow. Second operand 7 states and 1006 transitions. [2023-09-01 13:32:31,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 308 transitions, 2376 flow [2023-09-01 13:32:31,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 308 transitions, 2233 flow, removed 57 selfloop flow, removed 15 redundant places. [2023-09-01 13:32:31,897 INFO L231 Difference]: Finished difference. Result has 70 places, 88 transitions, 595 flow [2023-09-01 13:32:31,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=595, PETRI_PLACES=70, PETRI_TRANSITIONS=88} [2023-09-01 13:32:31,898 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2023-09-01 13:32:31,898 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 88 transitions, 595 flow [2023-09-01 13:32:31,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 131.28571428571428) internal successors, (919), 7 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:31,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:32:31,899 INFO L208 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] [2023-09-01 13:32:31,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 13:32:32,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-09-01 13:32:32,105 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 2 more)] === [2023-09-01 13:32:32,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:32:32,106 INFO L85 PathProgramCache]: Analyzing trace with hash -1896766330, now seen corresponding path program 4 times [2023-09-01 13:32:32,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:32:32,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204744874] [2023-09-01 13:32:32,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:32,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:32:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:32,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 13:32:32,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:32:32,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204744874] [2023-09-01 13:32:32,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204744874] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 13:32:32,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 13:32:32,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 13:32:32,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925897686] [2023-09-01 13:32:32,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 13:32:32,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 13:32:32,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:32:32,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 13:32:32,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 13:32:32,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 136 out of 296 [2023-09-01 13:32:32,332 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 88 transitions, 595 flow. Second operand has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:32,332 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:32:32,332 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 136 of 296 [2023-09-01 13:32:32,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:32:33,402 INFO L130 PetriNetUnfolder]: 6863/9780 cut-off events. [2023-09-01 13:32:33,402 INFO L131 PetriNetUnfolder]: For 31304/32506 co-relation queries the response was YES. [2023-09-01 13:32:33,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38446 conditions, 9780 events. 6863/9780 cut-off events. For 31304/32506 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 50432 event pairs, 996 based on Foata normal form. 1198/10100 useless extension candidates. Maximal degree in co-relation 38412. Up to 6365 conditions per place. [2023-09-01 13:32:33,435 INFO L137 encePairwiseOnDemand]: 292/296 looper letters, 92 selfloop transitions, 4 changer transitions 100/197 dead transitions. [2023-09-01 13:32:33,436 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 197 transitions, 1789 flow [2023-09-01 13:32:33,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 13:32:33,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 13:32:33,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 742 transitions. [2023-09-01 13:32:33,443 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5013513513513513 [2023-09-01 13:32:33,443 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 742 transitions. [2023-09-01 13:32:33,443 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 742 transitions. [2023-09-01 13:32:33,444 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:32:33,444 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 742 transitions. [2023-09-01 13:32:33,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 148.4) internal successors, (742), 5 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:33,447 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:33,448 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 296.0) internal successors, (1776), 6 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:33,448 INFO L175 Difference]: Start difference. First operand has 70 places, 88 transitions, 595 flow. Second operand 5 states and 742 transitions. [2023-09-01 13:32:33,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 197 transitions, 1789 flow [2023-09-01 13:32:33,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 197 transitions, 1684 flow, removed 40 selfloop flow, removed 3 redundant places. [2023-09-01 13:32:33,579 INFO L231 Difference]: Finished difference. Result has 71 places, 80 transitions, 494 flow [2023-09-01 13:32:33,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=494, PETRI_PLACES=71, PETRI_TRANSITIONS=80} [2023-09-01 13:32:33,581 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 31 predicate places. [2023-09-01 13:32:33,581 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 80 transitions, 494 flow [2023-09-01 13:32:33,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 143.5) internal successors, (574), 4 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:33,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:32:33,582 INFO L208 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] [2023-09-01 13:32:33,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-09-01 13:32:33,582 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 2 more)] === [2023-09-01 13:32:33,583 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:32:33,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1508571068, now seen corresponding path program 5 times [2023-09-01 13:32:33,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:32:33,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762798327] [2023-09-01 13:32:33,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:33,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:32:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:34,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:32:34,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:32:34,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762798327] [2023-09-01 13:32:34,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762798327] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:32:34,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028682826] [2023-09-01 13:32:34,235 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-09-01 13:32:34,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:32:34,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:32:34,236 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:32:34,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 13:32:34,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-09-01 13:32:34,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:32:34,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 27 conjunts are in the unsatisfiable core [2023-09-01 13:32:34,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:32:34,432 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 16 [2023-09-01 13:32:34,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:32:34,484 INFO L350 Elim1Store]: Elim1 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 16 treesize of output 18 [2023-09-01 13:32:34,582 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 7 [2023-09-01 13:32:34,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:32:34,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:32:34,961 WARN L839 $PredicateComparison]: unable to prove that (let ((.cse1 (+ c_~A~0.offset (* 4 c_thread2Thread1of1ForFork3_~i~1)))) (and (or (<= 2147483647 c_~max~0) (forall ((v_ArrVal_385 (Array Int Int))) (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_385) c_~A~0.base))) (or (<= (select .cse0 c_~A~0.offset) (+ c_~max~0 1)) (<= c_~max~0 (select .cse0 .cse1)))))) (forall ((v_ArrVal_385 (Array Int Int))) (let ((.cse2 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_385) c_~A~0.base))) (let ((.cse3 (select .cse2 .cse1))) (or (<= (select .cse2 c_~A~0.offset) (+ .cse3 1)) (<= 2147483647 .cse3) (< .cse3 c_~max~0))))))) is different from false [2023-09-01 13:32:34,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:32:34,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028682826] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:32:34,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:32:34,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 8] total 28 [2023-09-01 13:32:34,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810728735] [2023-09-01 13:32:34,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:32:34,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-09-01 13:32:34,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:32:34,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-09-01 13:32:34,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=634, Unknown=1, NotChecked=52, Total=812 [2023-09-01 13:32:35,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 100 out of 296 [2023-09-01 13:32:35,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 80 transitions, 494 flow. Second operand has 29 states, 29 states have (on average 103.20689655172414) internal successors, (2993), 29 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:35,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:32:35,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 100 of 296 [2023-09-01 13:32:35,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:32:42,887 INFO L130 PetriNetUnfolder]: 30257/41817 cut-off events. [2023-09-01 13:32:42,888 INFO L131 PetriNetUnfolder]: For 162503/162503 co-relation queries the response was YES. [2023-09-01 13:32:43,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 169293 conditions, 41817 events. 30257/41817 cut-off events. For 162503/162503 co-relation queries the response was YES. Maximal size of possible extension queue 1405. Compared 246153 event pairs, 2351 based on Foata normal form. 28/38545 useless extension candidates. Maximal degree in co-relation 169258. Up to 10235 conditions per place. [2023-09-01 13:32:43,110 INFO L137 encePairwiseOnDemand]: 276/296 looper letters, 399 selfloop transitions, 197 changer transitions 1048/1644 dead transitions. [2023-09-01 13:32:43,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 1644 transitions, 12718 flow [2023-09-01 13:32:43,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2023-09-01 13:32:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2023-09-01 13:32:43,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 9280 transitions. [2023-09-01 13:32:43,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3823335530652604 [2023-09-01 13:32:43,132 INFO L72 ComplementDD]: Start complementDD. Operand 82 states and 9280 transitions. [2023-09-01 13:32:43,132 INFO L73 IsDeterministic]: Start isDeterministic. Operand 82 states and 9280 transitions. [2023-09-01 13:32:43,138 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:32:43,138 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 82 states and 9280 transitions. [2023-09-01 13:32:43,158 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 83 states, 82 states have (on average 113.17073170731707) internal successors, (9280), 82 states have internal predecessors, (9280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:43,202 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 83 states, 83 states have (on average 296.0) internal successors, (24568), 83 states have internal predecessors, (24568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:43,210 INFO L81 ComplementDD]: Finished complementDD. Result has 83 states, 83 states have (on average 296.0) internal successors, (24568), 83 states have internal predecessors, (24568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:43,210 INFO L175 Difference]: Start difference. First operand has 71 places, 80 transitions, 494 flow. Second operand 82 states and 9280 transitions. [2023-09-01 13:32:43,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 1644 transitions, 12718 flow [2023-09-01 13:32:44,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 1644 transitions, 12256 flow, removed 172 selfloop flow, removed 5 redundant places. [2023-09-01 13:32:44,157 INFO L231 Difference]: Finished difference. Result has 211 places, 278 transitions, 3003 flow [2023-09-01 13:32:44,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=470, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=82, PETRI_FLOW=3003, PETRI_PLACES=211, PETRI_TRANSITIONS=278} [2023-09-01 13:32:44,158 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 171 predicate places. [2023-09-01 13:32:44,159 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 278 transitions, 3003 flow [2023-09-01 13:32:44,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 103.20689655172414) internal successors, (2993), 29 states have internal predecessors, (2993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:44,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:32:44,160 INFO L208 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] [2023-09-01 13:32:44,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 13:32:44,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:32:44,366 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 2 more)] === [2023-09-01 13:32:44,367 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:32:44,367 INFO L85 PathProgramCache]: Analyzing trace with hash 957774916, now seen corresponding path program 6 times [2023-09-01 13:32:44,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:32:44,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337526624] [2023-09-01 13:32:44,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:32:44,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:32:44,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:32:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:32:44,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:32:44,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337526624] [2023-09-01 13:32:44,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337526624] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:32:44,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162935557] [2023-09-01 13:32:44,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-09-01 13:32:44,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:32:44,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:32:44,817 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:32:44,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 13:32:45,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-09-01 13:32:45,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:32:45,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 13:32:45,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:32:45,265 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 16 [2023-09-01 13:32:45,334 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2023-09-01 13:32:45,362 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:32:45,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:32:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:32:45,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1162935557] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:32:45,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:32:45,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 8] total 22 [2023-09-01 13:32:45,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298119363] [2023-09-01 13:32:45,679 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:32:45,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-09-01 13:32:45,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:32:45,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-09-01 13:32:45,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2023-09-01 13:32:46,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 296 [2023-09-01 13:32:46,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 278 transitions, 3003 flow. Second operand has 23 states, 23 states have (on average 124.43478260869566) internal successors, (2862), 23 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:32:46,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:32:46,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 296 [2023-09-01 13:32:46,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:32:59,640 INFO L130 PetriNetUnfolder]: 42315/59435 cut-off events. [2023-09-01 13:32:59,641 INFO L131 PetriNetUnfolder]: For 3868427/3868427 co-relation queries the response was YES. [2023-09-01 13:33:00,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 589763 conditions, 59435 events. 42315/59435 cut-off events. For 3868427/3868427 co-relation queries the response was YES. Maximal size of possible extension queue 2091. Compared 379928 event pairs, 6505 based on Foata normal form. 33/59467 useless extension candidates. Maximal degree in co-relation 589664. Up to 27235 conditions per place. [2023-09-01 13:33:00,783 INFO L137 encePairwiseOnDemand]: 282/296 looper letters, 576 selfloop transitions, 338 changer transitions 726/1640 dead transitions. [2023-09-01 13:33:00,784 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 1640 transitions, 25449 flow [2023-09-01 13:33:00,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-09-01 13:33:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2023-09-01 13:33:00,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 8695 transitions. [2023-09-01 13:33:00,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4519230769230769 [2023-09-01 13:33:00,795 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 8695 transitions. [2023-09-01 13:33:00,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 8695 transitions. [2023-09-01 13:33:00,798 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:33:00,798 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 8695 transitions. [2023-09-01 13:33:00,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 133.76923076923077) internal successors, (8695), 65 states have internal predecessors, (8695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:00,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 296.0) internal successors, (19536), 66 states have internal predecessors, (19536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:00,831 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 296.0) internal successors, (19536), 66 states have internal predecessors, (19536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:00,831 INFO L175 Difference]: Start difference. First operand has 211 places, 278 transitions, 3003 flow. Second operand 65 states and 8695 transitions. [2023-09-01 13:33:00,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 1640 transitions, 25449 flow [2023-09-01 13:33:11,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 1640 transitions, 19519 flow, removed 2963 selfloop flow, removed 44 redundant places. [2023-09-01 13:33:11,521 INFO L231 Difference]: Finished difference. Result has 225 places, 558 transitions, 7232 flow [2023-09-01 13:33:11,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=2636, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=7232, PETRI_PLACES=225, PETRI_TRANSITIONS=558} [2023-09-01 13:33:11,522 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 185 predicate places. [2023-09-01 13:33:11,522 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 558 transitions, 7232 flow [2023-09-01 13:33:11,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 124.43478260869566) internal successors, (2862), 23 states have internal predecessors, (2862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:11,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:33:11,523 INFO L208 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] [2023-09-01 13:33:11,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-09-01 13:33:11,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:33:11,729 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 2 more)] === [2023-09-01 13:33:11,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:33:11,729 INFO L85 PathProgramCache]: Analyzing trace with hash 1014827836, now seen corresponding path program 7 times [2023-09-01 13:33:11,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:33:11,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818970180] [2023-09-01 13:33:11,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:33:11,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:33:11,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:33:12,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:33:12,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:33:12,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818970180] [2023-09-01 13:33:12,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818970180] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:33:12,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921205653] [2023-09-01 13:33:12,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-09-01 13:33:12,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:33:12,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:33:12,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:33:12,178 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-09-01 13:33:12,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:33:12,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 33 conjunts are in the unsatisfiable core [2023-09-01 13:33:12,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:33:12,376 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 35 treesize of output 19 [2023-09-01 13:33:12,453 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2023-09-01 13:33:12,492 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:33:12,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:33:12,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:33:12,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921205653] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:33:12,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:33:12,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10, 9] total 25 [2023-09-01 13:33:12,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682473010] [2023-09-01 13:33:12,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:33:12,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-09-01 13:33:12,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:33:12,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-09-01 13:33:12,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2023-09-01 13:33:13,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 296 [2023-09-01 13:33:13,351 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 558 transitions, 7232 flow. Second operand has 26 states, 26 states have (on average 124.15384615384616) internal successors, (3228), 26 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:13,351 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:33:13,351 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 296 [2023-09-01 13:33:13,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:33:34,122 INFO L130 PetriNetUnfolder]: 64763/91287 cut-off events. [2023-09-01 13:33:34,122 INFO L131 PetriNetUnfolder]: For 3687733/3687733 co-relation queries the response was YES. [2023-09-01 13:33:35,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 750693 conditions, 91287 events. 64763/91287 cut-off events. For 3687733/3687733 co-relation queries the response was YES. Maximal size of possible extension queue 3314. Compared 620871 event pairs, 12176 based on Foata normal form. 100/91386 useless extension candidates. Maximal degree in co-relation 750588. Up to 41253 conditions per place. [2023-09-01 13:33:35,942 INFO L137 encePairwiseOnDemand]: 283/296 looper letters, 560 selfloop transitions, 393 changer transitions 1199/2152 dead transitions. [2023-09-01 13:33:35,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 2152 transitions, 32384 flow [2023-09-01 13:33:35,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-09-01 13:33:35,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2023-09-01 13:33:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 8934 transitions. [2023-09-01 13:33:35,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45048406615570796 [2023-09-01 13:33:35,954 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 8934 transitions. [2023-09-01 13:33:35,954 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 8934 transitions. [2023-09-01 13:33:35,956 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:33:35,956 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 8934 transitions. [2023-09-01 13:33:35,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 133.34328358208955) internal successors, (8934), 67 states have internal predecessors, (8934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:35,980 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 296.0) internal successors, (20128), 68 states have internal predecessors, (20128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:35,982 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 296.0) internal successors, (20128), 68 states have internal predecessors, (20128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:33:35,982 INFO L175 Difference]: Start difference. First operand has 225 places, 558 transitions, 7232 flow. Second operand 67 states and 8934 transitions. [2023-09-01 13:33:35,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 2152 transitions, 32384 flow [2023-09-01 13:34:03,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 2152 transitions, 30599 flow, removed 822 selfloop flow, removed 24 redundant places. [2023-09-01 13:34:03,449 INFO L231 Difference]: Finished difference. Result has 290 places, 730 transitions, 10728 flow [2023-09-01 13:34:03,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=6769, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=250, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=10728, PETRI_PLACES=290, PETRI_TRANSITIONS=730} [2023-09-01 13:34:03,450 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 250 predicate places. [2023-09-01 13:34:03,451 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 730 transitions, 10728 flow [2023-09-01 13:34:03,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 124.15384615384616) internal successors, (3228), 26 states have internal predecessors, (3228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:03,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:34:03,452 INFO L208 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] [2023-09-01 13:34:03,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-09-01 13:34:03,657 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,SelfDestructingSolverStorable10 [2023-09-01 13:34:03,657 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 2 more)] === [2023-09-01 13:34:03,657 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:34:03,658 INFO L85 PathProgramCache]: Analyzing trace with hash -1029139722, now seen corresponding path program 8 times [2023-09-01 13:34:03,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:34:03,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917037508] [2023-09-01 13:34:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:34:03,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:34:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:34:04,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:34:04,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:34:04,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917037508] [2023-09-01 13:34:04,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1917037508] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:34:04,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729210877] [2023-09-01 13:34:04,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 13:34:04,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:34:04,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:34:04,353 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:34:04,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-09-01 13:34:04,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 13:34:04,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:34:04,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 38 conjunts are in the unsatisfiable core [2023-09-01 13:34:04,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:34:04,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:34:04,812 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 13:34:04,871 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 35 treesize of output 19 [2023-09-01 13:34:04,956 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2023-09-01 13:34:05,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:34:05,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:34:05,304 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_582 (Array Int Int))) (let ((.cse0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t4~0#1.base| v_ArrVal_582) c_~A~0.base) c_~A~0.offset))) (or (< .cse0 (+ c_~max~0 1)) (<= 2147483647 .cse0)))) is different from false [2023-09-01 13:34:05,474 INFO L350 Elim1Store]: Elim1 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 41 treesize of output 33 [2023-09-01 13:34:05,478 INFO L350 Elim1Store]: Elim1 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 5 treesize of output 3 [2023-09-01 13:34:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-09-01 13:34:09,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729210877] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:34:09,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:34:09,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 12] total 35 [2023-09-01 13:34:09,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995308277] [2023-09-01 13:34:09,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:34:09,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-09-01 13:34:09,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:34:09,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-09-01 13:34:09,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1049, Unknown=8, NotChecked=68, Total=1332 [2023-09-01 13:34:09,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 296 [2023-09-01 13:34:09,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 730 transitions, 10728 flow. Second operand has 37 states, 37 states have (on average 98.51351351351352) internal successors, (3645), 37 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:09,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:34:09,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 296 [2023-09-01 13:34:09,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 13:34:42,421 INFO L130 PetriNetUnfolder]: 65139/92052 cut-off events. [2023-09-01 13:34:42,422 INFO L131 PetriNetUnfolder]: For 9333437/9333437 co-relation queries the response was YES. [2023-09-01 13:34:44,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 979423 conditions, 92052 events. 65139/92052 cut-off events. For 9333437/9333437 co-relation queries the response was YES. Maximal size of possible extension queue 3151. Compared 627831 event pairs, 9033 based on Foata normal form. 91/92142 useless extension candidates. Maximal degree in co-relation 979285. Up to 41347 conditions per place. [2023-09-01 13:34:44,998 INFO L137 encePairwiseOnDemand]: 283/296 looper letters, 526 selfloop transitions, 553 changer transitions 1413/2492 dead transitions. [2023-09-01 13:34:44,998 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 2492 transitions, 44660 flow [2023-09-01 13:34:44,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-09-01 13:34:44,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2023-09-01 13:34:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 10140 transitions. [2023-09-01 13:34:45,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36059743954480794 [2023-09-01 13:34:45,010 INFO L72 ComplementDD]: Start complementDD. Operand 95 states and 10140 transitions. [2023-09-01 13:34:45,010 INFO L73 IsDeterministic]: Start isDeterministic. Operand 95 states and 10140 transitions. [2023-09-01 13:34:45,012 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 13:34:45,013 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 95 states and 10140 transitions. [2023-09-01 13:34:45,024 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 96 states, 95 states have (on average 106.73684210526316) internal successors, (10140), 95 states have internal predecessors, (10140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:45,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 96 states, 96 states have (on average 296.0) internal successors, (28416), 96 states have internal predecessors, (28416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:45,049 INFO L81 ComplementDD]: Finished complementDD. Result has 96 states, 96 states have (on average 296.0) internal successors, (28416), 96 states have internal predecessors, (28416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:34:45,050 INFO L175 Difference]: Start difference. First operand has 290 places, 730 transitions, 10728 flow. Second operand 95 states and 10140 transitions. [2023-09-01 13:34:45,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 2492 transitions, 44660 flow [2023-09-01 13:35:36,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 2492 transitions, 40181 flow, removed 2219 selfloop flow, removed 31 redundant places. [2023-09-01 13:35:36,120 INFO L231 Difference]: Finished difference. Result has 397 places, 874 transitions, 14933 flow [2023-09-01 13:35:36,121 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=296, PETRI_DIFFERENCE_MINUEND_FLOW=9953, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=425, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=95, PETRI_FLOW=14933, PETRI_PLACES=397, PETRI_TRANSITIONS=874} [2023-09-01 13:35:36,121 INFO L281 CegarLoopForPetriNet]: 40 programPoint places, 357 predicate places. [2023-09-01 13:35:36,121 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 874 transitions, 14933 flow [2023-09-01 13:35:36,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 98.51351351351352) internal successors, (3645), 37 states have internal predecessors, (3645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:36,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 13:35:36,122 INFO L208 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] [2023-09-01 13:35:36,128 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-09-01 13:35:36,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:35:36,325 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 2 more)] === [2023-09-01 13:35:36,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 13:35:36,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1244078106, now seen corresponding path program 9 times [2023-09-01 13:35:36,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 13:35:36,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499867656] [2023-09-01 13:35:36,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 13:35:36,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 13:35:36,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 13:35:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-09-01 13:35:36,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 13:35:36,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499867656] [2023-09-01 13:35:36,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499867656] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 13:35:36,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500202117] [2023-09-01 13:35:36,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-09-01 13:35:36,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 13:35:36,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 13:35:36,750 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 13:35:36,752 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-09-01 13:35:37,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-09-01 13:35:37,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 13:35:37,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 40 conjunts are in the unsatisfiable core [2023-09-01 13:35:37,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 13:35:37,166 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:35:37,167 INFO L350 Elim1Store]: Elim1 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 [2023-09-01 13:35:37,285 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 28 treesize of output 16 [2023-09-01 13:35:37,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 13:35:37,336 INFO L350 Elim1Store]: Elim1 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 23 treesize of output 23 [2023-09-01 13:35:37,395 INFO L350 Elim1Store]: Elim1 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 17 treesize of output 9 [2023-09-01 13:35:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:35:37,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 13:35:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 13:35:37,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500202117] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 13:35:37,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 13:35:37,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 10] total 31 [2023-09-01 13:35:37,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703963943] [2023-09-01 13:35:37,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 13:35:37,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-09-01 13:35:37,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 13:35:37,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-09-01 13:35:37,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=795, Unknown=4, NotChecked=0, Total=992 [2023-09-01 13:35:38,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 296 [2023-09-01 13:35:38,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 874 transitions, 14933 flow. Second operand has 32 states, 32 states have (on average 99.8125) internal successors, (3194), 32 states have internal predecessors, (3194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 13:35:38,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 13:35:38,275 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 296 [2023-09-01 13:35:38,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand