./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --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-more-array-sum-alt2.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 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 20:32:11,856 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 20:32:11,858 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 20:32:11,899 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 20:32:11,901 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 20:32:11,904 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 20:32:11,905 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 20:32:11,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 20:32:11,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 20:32:11,913 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 20:32:11,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 20:32:11,917 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 20:32:11,917 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 20:32:11,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 20:32:11,920 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 20:32:11,925 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 20:32:11,925 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 20:32:11,927 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 20:32:11,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 20:32:11,932 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 20:32:11,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 20:32:11,934 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 20:32:11,935 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 20:32:11,936 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 20:32:11,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 20:32:11,942 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 20:32:11,942 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 20:32:11,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 20:32:11,944 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 20:32:11,945 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 20:32:11,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 20:32:11,951 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 20:32:11,953 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 20:32:11,953 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 20:32:11,954 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 20:32:11,954 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 20:32:11,955 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 20:32:11,955 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 20:32:11,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 20:32:11,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 20:32:11,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 20:32:11,958 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 20:32:11,989 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 20:32:11,990 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 20:32:11,991 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 20:32:11,991 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 20:32:11,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 20:32:11,992 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 20:32:11,992 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 20:32:11,993 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 20:32:11,993 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 20:32:11,993 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 20:32:11,994 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 20:32:11,994 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 20:32:11,994 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 20:32:11,994 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 20:32:11,994 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 20:32:11,995 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 20:32:11,995 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 20:32:11,995 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 20:32:11,995 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 20:32:11,995 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 20:32:11,995 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 20:32:11,996 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 20:32:11,996 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 20:32:11,996 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 20:32:11,996 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:32:11,996 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 20:32:11,996 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 20:32:11,997 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 20:32:11,997 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 20:32:11,997 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 20:32:11,997 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 20:32:11,997 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 20:32:11,998 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 20:32:11,998 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 20:32:11,998 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 20:32:11,998 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4018a1168c08743b2a9b9283b6137e1dcc53bdf8ab8362348f4bbe02762305c3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 20:32:12,295 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 20:32:12,318 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 20:32:12,320 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 20:32:12,321 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 20:32:12,322 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 20:32:12,323 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-30 20:32:13,468 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 20:32:13,657 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 20:32:13,658 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-more-array-sum-alt2.wvr.c [2023-08-30 20:32:13,667 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f76463580/c5f90af70a0c47d9b11c41198623c34b/FLAG2d5e2d124 [2023-08-30 20:32:13,686 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f76463580/c5f90af70a0c47d9b11c41198623c34b [2023-08-30 20:32:13,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 20:32:13,690 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 20:32:13,692 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 20:32:13,692 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 20:32:13,694 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 20:32:13,695 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:13,696 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18f48632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13, skipping insertion in model container [2023-08-30 20:32:13,696 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:13,701 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 20:32:13,719 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 20:32:13,910 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-more-array-sum-alt2.wvr.c[2525,2538] [2023-08-30 20:32:13,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:32:13,933 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 20:32:13,948 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-more-array-sum-alt2.wvr.c[2525,2538] [2023-08-30 20:32:13,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 20:32:13,956 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:32:13,957 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 20:32:13,961 INFO L208 MainTranslator]: Completed translation [2023-08-30 20:32:13,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13 WrapperNode [2023-08-30 20:32:13,961 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 20:32:13,962 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 20:32:13,962 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 20:32:13,962 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 20:32:13,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:13,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:13,997 INFO L138 Inliner]: procedures = 25, calls = 45, calls flagged for inlining = 12, calls inlined = 16, statements flattened = 194 [2023-08-30 20:32:13,998 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 20:32:13,998 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 20:32:13,999 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 20:32:13,999 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 20:32:14,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:14,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:14,008 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:14,011 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:14,018 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:14,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:14,033 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:14,035 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:14,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 20:32:14,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 20:32:14,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 20:32:14,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 20:32:14,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (1/1) ... [2023-08-30 20:32:14,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 20:32:14,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:14,063 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) [2023-08-30 20:32:14,086 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 [2023-08-30 20:32:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 20:32:14,114 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 20:32:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 20:32:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 20:32:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 20:32:14,115 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 20:32:14,115 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 20:32:14,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 20:32:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-30 20:32:14,116 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-30 20:32:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 20:32:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 20:32:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 20:32:14,116 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-30 20:32:14,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 20:32:14,117 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 20:32:14,117 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 20:32:14,118 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 20:32:14,262 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 20:32:14,278 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 20:32:14,632 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 20:32:14,768 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 20:32:14,768 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-30 20:32:14,770 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:32:14 BoogieIcfgContainer [2023-08-30 20:32:14,770 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 20:32:14,773 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 20:32:14,773 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 20:32:14,775 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 20:32:14,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 08:32:13" (1/3) ... [2023-08-30 20:32:14,776 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5147fdfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:32:14, skipping insertion in model container [2023-08-30 20:32:14,776 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 08:32:13" (2/3) ... [2023-08-30 20:32:14,777 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5147fdfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 08:32:14, skipping insertion in model container [2023-08-30 20:32:14,777 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 08:32:14" (3/3) ... [2023-08-30 20:32:14,778 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-array-sum-alt2.wvr.c [2023-08-30 20:32:14,784 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 20:32:14,792 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 20:32:14,793 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 20:32:14,793 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 20:32:14,862 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-08-30 20:32:14,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 142 places, 144 transitions, 312 flow [2023-08-30 20:32:14,982 INFO L130 PetriNetUnfolder]: 12/141 cut-off events. [2023-08-30 20:32:14,982 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:32:14,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 141 events. 12/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 91 event pairs, 0 based on Foata normal form. 0/128 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-30 20:32:14,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 142 places, 144 transitions, 312 flow [2023-08-30 20:32:14,994 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 129 places, 131 transitions, 280 flow [2023-08-30 20:32:14,997 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 20:32:15,011 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 129 places, 131 transitions, 280 flow [2023-08-30 20:32:15,015 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 129 places, 131 transitions, 280 flow [2023-08-30 20:32:15,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 129 places, 131 transitions, 280 flow [2023-08-30 20:32:15,059 INFO L130 PetriNetUnfolder]: 12/131 cut-off events. [2023-08-30 20:32:15,060 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:32:15,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144 conditions, 131 events. 12/131 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 92 event pairs, 0 based on Foata normal form. 0/119 useless extension candidates. Maximal degree in co-relation 105. Up to 2 conditions per place. [2023-08-30 20:32:15,064 INFO L119 LiptonReduction]: Number of co-enabled transitions 1320 [2023-08-30 20:32:19,097 INFO L134 LiptonReduction]: Checked pairs total: 1489 [2023-08-30 20:32:19,097 INFO L136 LiptonReduction]: Total number of compositions: 124 [2023-08-30 20:32:19,108 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 20:32:19,113 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;@4e62c352, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 20:32:19,114 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-30 20:32:19,119 INFO L130 PetriNetUnfolder]: 4/23 cut-off events. [2023-08-30 20:32:19,119 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-08-30 20:32:19,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:19,120 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] [2023-08-30 20:32:19,121 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:19,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:19,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1718329889, now seen corresponding path program 1 times [2023-08-30 20:32:19,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:19,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56227039] [2023-08-30 20:32:19,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:19,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:19,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:19,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56227039] [2023-08-30 20:32:19,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56227039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:32:19,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:32:19,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-30 20:32:19,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252717065] [2023-08-30 20:32:19,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:32:19,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-30 20:32:19,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:19,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-30 20:32:19,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-30 20:32:19,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 268 [2023-08-30 20:32:19,549 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:19,549 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:19,550 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 268 [2023-08-30 20:32:19,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:19,690 INFO L130 PetriNetUnfolder]: 360/508 cut-off events. [2023-08-30 20:32:19,691 INFO L131 PetriNetUnfolder]: For 42/42 co-relation queries the response was YES. [2023-08-30 20:32:19,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1068 conditions, 508 events. 360/508 cut-off events. For 42/42 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1608 event pairs, 39 based on Foata normal form. 1/311 useless extension candidates. Maximal degree in co-relation 803. Up to 421 conditions per place. [2023-08-30 20:32:19,696 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 32 selfloop transitions, 4 changer transitions 1/40 dead transitions. [2023-08-30 20:32:19,696 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 40 transitions, 187 flow [2023-08-30 20:32:19,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-30 20:32:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-30 20:32:19,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 410 transitions. [2023-08-30 20:32:19,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099502487562189 [2023-08-30 20:32:19,716 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 410 transitions. [2023-08-30 20:32:19,717 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 410 transitions. [2023-08-30 20:32:19,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:19,723 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 410 transitions. [2023-08-30 20:32:19,729 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.66666666666666) internal successors, (410), 3 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:19,735 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:19,736 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 268.0) internal successors, (1072), 4 states have internal predecessors, (1072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:19,738 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 66 flow. Second operand 3 states and 410 transitions. [2023-08-30 20:32:19,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 40 transitions, 187 flow [2023-08-30 20:32:19,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 40 transitions, 165 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-30 20:32:19,743 INFO L231 Difference]: Finished difference. Result has 27 places, 27 transitions, 80 flow [2023-08-30 20:32:19,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=80, PETRI_PLACES=27, PETRI_TRANSITIONS=27} [2023-08-30 20:32:19,765 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, -3 predicate places. [2023-08-30 20:32:19,767 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 27 transitions, 80 flow [2023-08-30 20:32:19,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.66666666666666) internal successors, (389), 3 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:19,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:19,770 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] [2023-08-30 20:32:19,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 20:32:19,771 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:19,778 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:19,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1448534594, now seen corresponding path program 1 times [2023-08-30 20:32:19,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:19,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276632727] [2023-08-30 20:32:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:19,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:19,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:20,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:20,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276632727] [2023-08-30 20:32:20,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276632727] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:32:20,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:32:20,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:32:20,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686942733] [2023-08-30 20:32:20,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:32:20,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:32:20,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:20,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:32:20,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:32:20,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 117 out of 268 [2023-08-30 20:32:20,065 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 27 transitions, 80 flow. Second operand has 5 states, 5 states have (on average 120.8) internal successors, (604), 5 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:20,066 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:20,066 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 117 of 268 [2023-08-30 20:32:20,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:20,252 INFO L130 PetriNetUnfolder]: 621/928 cut-off events. [2023-08-30 20:32:20,252 INFO L131 PetriNetUnfolder]: For 261/264 co-relation queries the response was YES. [2023-08-30 20:32:20,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2269 conditions, 928 events. 621/928 cut-off events. For 261/264 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3958 event pairs, 194 based on Foata normal form. 34/957 useless extension candidates. Maximal degree in co-relation 487. Up to 484 conditions per place. [2023-08-30 20:32:20,258 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 54 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2023-08-30 20:32:20,258 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 60 transitions, 292 flow [2023-08-30 20:32:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:32:20,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:32:20,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 637 transitions. [2023-08-30 20:32:20,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4753731343283582 [2023-08-30 20:32:20,261 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 637 transitions. [2023-08-30 20:32:20,261 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 637 transitions. [2023-08-30 20:32:20,261 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:20,261 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 637 transitions. [2023-08-30 20:32:20,263 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 127.4) internal successors, (637), 5 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:20,266 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:20,266 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:20,267 INFO L175 Difference]: Start difference. First operand has 27 places, 27 transitions, 80 flow. Second operand 5 states and 637 transitions. [2023-08-30 20:32:20,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 60 transitions, 292 flow [2023-08-30 20:32:20,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 60 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-30 20:32:20,269 INFO L231 Difference]: Finished difference. Result has 33 places, 30 transitions, 106 flow [2023-08-30 20:32:20,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=106, PETRI_PLACES=33, PETRI_TRANSITIONS=30} [2023-08-30 20:32:20,270 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 3 predicate places. [2023-08-30 20:32:20,270 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 30 transitions, 106 flow [2023-08-30 20:32:20,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 120.8) internal successors, (604), 5 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:20,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:20,271 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] [2023-08-30 20:32:20,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 20:32:20,271 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:20,271 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:20,272 INFO L85 PathProgramCache]: Analyzing trace with hash 810023898, now seen corresponding path program 1 times [2023-08-30 20:32:20,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:20,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487492860] [2023-08-30 20:32:20,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:20,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:20,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:20,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:20,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487492860] [2023-08-30 20:32:20,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487492860] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:32:20,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:32:20,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:32:20,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666739314] [2023-08-30 20:32:20,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:32:20,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:32:20,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:20,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:32:20,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:32:20,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 116 out of 268 [2023-08-30 20:32:20,492 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 30 transitions, 106 flow. Second operand has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:20,492 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:20,492 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 116 of 268 [2023-08-30 20:32:20,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:20,642 INFO L130 PetriNetUnfolder]: 481/749 cut-off events. [2023-08-30 20:32:20,642 INFO L131 PetriNetUnfolder]: For 330/360 co-relation queries the response was YES. [2023-08-30 20:32:20,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1795 conditions, 749 events. 481/749 cut-off events. For 330/360 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 3139 event pairs, 223 based on Foata normal form. 58/803 useless extension candidates. Maximal degree in co-relation 1233. Up to 486 conditions per place. [2023-08-30 20:32:20,646 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 50 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2023-08-30 20:32:20,647 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 57 transitions, 286 flow [2023-08-30 20:32:20,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:32:20,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:32:20,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 630 transitions. [2023-08-30 20:32:20,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4701492537313433 [2023-08-30 20:32:20,649 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 630 transitions. [2023-08-30 20:32:20,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 630 transitions. [2023-08-30 20:32:20,649 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:20,649 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 630 transitions. [2023-08-30 20:32:20,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 126.0) internal successors, (630), 5 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:20,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:20,654 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:20,654 INFO L175 Difference]: Start difference. First operand has 33 places, 30 transitions, 106 flow. Second operand 5 states and 630 transitions. [2023-08-30 20:32:20,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 57 transitions, 286 flow [2023-08-30 20:32:20,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 57 transitions, 282 flow, removed 1 selfloop flow, removed 1 redundant places. [2023-08-30 20:32:20,656 INFO L231 Difference]: Finished difference. Result has 38 places, 31 transitions, 121 flow [2023-08-30 20:32:20,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=121, PETRI_PLACES=38, PETRI_TRANSITIONS=31} [2023-08-30 20:32:20,657 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-08-30 20:32:20,657 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 31 transitions, 121 flow [2023-08-30 20:32:20,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 119.8) internal successors, (599), 5 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:20,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:20,658 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] [2023-08-30 20:32:20,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 20:32:20,659 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:20,659 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:20,659 INFO L85 PathProgramCache]: Analyzing trace with hash -92133956, now seen corresponding path program 1 times [2023-08-30 20:32:20,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:20,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233102679] [2023-08-30 20:32:20,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:20,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:20,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:20,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:20,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233102679] [2023-08-30 20:32:20,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233102679] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 20:32:20,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 20:32:20,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-30 20:32:20,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083316543] [2023-08-30 20:32:20,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:32:20,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:32:20,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:20,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:32:20,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 20:32:20,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 115 out of 268 [2023-08-30 20:32:20,857 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 31 transitions, 121 flow. Second operand has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:20,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:20,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 115 of 268 [2023-08-30 20:32:20,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:20,999 INFO L130 PetriNetUnfolder]: 419/637 cut-off events. [2023-08-30 20:32:20,999 INFO L131 PetriNetUnfolder]: For 434/470 co-relation queries the response was YES. [2023-08-30 20:32:21,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1640 conditions, 637 events. 419/637 cut-off events. For 434/470 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2508 event pairs, 140 based on Foata normal form. 50/675 useless extension candidates. Maximal degree in co-relation 1378. Up to 371 conditions per place. [2023-08-30 20:32:21,003 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 34 selfloop transitions, 3 changer transitions 25/64 dead transitions. [2023-08-30 20:32:21,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 64 transitions, 333 flow [2023-08-30 20:32:21,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 20:32:21,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 20:32:21,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 746 transitions. [2023-08-30 20:32:21,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4639303482587065 [2023-08-30 20:32:21,006 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 746 transitions. [2023-08-30 20:32:21,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 746 transitions. [2023-08-30 20:32:21,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:21,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 746 transitions. [2023-08-30 20:32:21,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.33333333333333) internal successors, (746), 6 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:21,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:21,012 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 268.0) internal successors, (1876), 7 states have internal predecessors, (1876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:21,012 INFO L175 Difference]: Start difference. First operand has 38 places, 31 transitions, 121 flow. Second operand 6 states and 746 transitions. [2023-08-30 20:32:21,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 64 transitions, 333 flow [2023-08-30 20:32:21,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 64 transitions, 320 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-08-30 20:32:21,015 INFO L231 Difference]: Finished difference. Result has 43 places, 28 transitions, 102 flow [2023-08-30 20:32:21,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=28} [2023-08-30 20:32:21,016 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 13 predicate places. [2023-08-30 20:32:21,016 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 28 transitions, 102 flow [2023-08-30 20:32:21,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.8) internal successors, (594), 5 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:21,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:21,016 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] [2023-08-30 20:32:21,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 20:32:21,017 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:21,017 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:21,017 INFO L85 PathProgramCache]: Analyzing trace with hash -862745430, now seen corresponding path program 1 times [2023-08-30 20:32:21,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:21,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349816887] [2023-08-30 20:32:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:21,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:21,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:21,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349816887] [2023-08-30 20:32:21,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349816887] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:21,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029488503] [2023-08-30 20:32:21,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:21,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:21,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:21,133 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) [2023-08-30 20:32:21,163 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 20:32:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:21,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:32:21,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:21,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:21,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:21,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:21,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029488503] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:21,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:21,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2023-08-30 20:32:21,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357561939] [2023-08-30 20:32:21,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:21,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-30 20:32:21,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:21,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-30 20:32:21,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:32:21,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:32:21,640 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 28 transitions, 102 flow. Second operand has 13 states, 13 states have (on average 111.0) internal successors, (1443), 13 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:21,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:21,640 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:32:21,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:21,874 INFO L130 PetriNetUnfolder]: 544/799 cut-off events. [2023-08-30 20:32:21,874 INFO L131 PetriNetUnfolder]: For 469/469 co-relation queries the response was YES. [2023-08-30 20:32:21,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2146 conditions, 799 events. 544/799 cut-off events. For 469/469 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3029 event pairs, 139 based on Foata normal form. 16/812 useless extension candidates. Maximal degree in co-relation 2121. Up to 410 conditions per place. [2023-08-30 20:32:21,880 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 58 selfloop transitions, 9 changer transitions 0/68 dead transitions. [2023-08-30 20:32:21,880 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 68 transitions, 372 flow [2023-08-30 20:32:21,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:32:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:32:21,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 815 transitions. [2023-08-30 20:32:21,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43443496801705755 [2023-08-30 20:32:21,883 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 815 transitions. [2023-08-30 20:32:21,883 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 815 transitions. [2023-08-30 20:32:21,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:21,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 815 transitions. [2023-08-30 20:32:21,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 116.42857142857143) internal successors, (815), 7 states have internal predecessors, (815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:21,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:21,888 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:21,888 INFO L175 Difference]: Start difference. First operand has 43 places, 28 transitions, 102 flow. Second operand 7 states and 815 transitions. [2023-08-30 20:32:21,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 68 transitions, 372 flow [2023-08-30 20:32:21,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 68 transitions, 337 flow, removed 14 selfloop flow, removed 8 redundant places. [2023-08-30 20:32:21,892 INFO L231 Difference]: Finished difference. Result has 38 places, 33 transitions, 142 flow [2023-08-30 20:32:21,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=142, PETRI_PLACES=38, PETRI_TRANSITIONS=33} [2023-08-30 20:32:21,893 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 8 predicate places. [2023-08-30 20:32:21,893 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 33 transitions, 142 flow [2023-08-30 20:32:21,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 111.0) internal successors, (1443), 13 states have internal predecessors, (1443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:21,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:21,894 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] [2023-08-30 20:32:21,908 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:22,101 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 [2023-08-30 20:32:22,102 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:22,102 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:22,102 INFO L85 PathProgramCache]: Analyzing trace with hash -733147742, now seen corresponding path program 2 times [2023-08-30 20:32:22,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:22,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630509996] [2023-08-30 20:32:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:22,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:22,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:22,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:22,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:22,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630509996] [2023-08-30 20:32:22,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630509996] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:22,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004047474] [2023-08-30 20:32:22,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:32:22,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:22,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:22,209 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) [2023-08-30 20:32:22,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 20:32:22,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:32:22,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:22,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:32:22,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:22,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:22,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:22,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:22,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004047474] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:22,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:32:22,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 12 [2023-08-30 20:32:22,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119351970] [2023-08-30 20:32:22,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:32:22,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:32:22,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:22,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:32:22,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-08-30 20:32:22,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:32:22,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 33 transitions, 142 flow. Second operand has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:22,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:22,606 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:32:22,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:22,853 INFO L130 PetriNetUnfolder]: 736/1083 cut-off events. [2023-08-30 20:32:22,853 INFO L131 PetriNetUnfolder]: For 1058/1058 co-relation queries the response was YES. [2023-08-30 20:32:22,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3402 conditions, 1083 events. 736/1083 cut-off events. For 1058/1058 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4396 event pairs, 221 based on Foata normal form. 12/1092 useless extension candidates. Maximal degree in co-relation 3380. Up to 648 conditions per place. [2023-08-30 20:32:22,860 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 60 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2023-08-30 20:32:22,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 73 transitions, 449 flow [2023-08-30 20:32:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:32:22,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:32:22,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 811 transitions. [2023-08-30 20:32:22,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43230277185501065 [2023-08-30 20:32:22,863 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 811 transitions. [2023-08-30 20:32:22,863 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 811 transitions. [2023-08-30 20:32:22,863 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:22,863 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 811 transitions. [2023-08-30 20:32:22,865 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 115.85714285714286) internal successors, (811), 7 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:22,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:22,868 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:22,868 INFO L175 Difference]: Start difference. First operand has 38 places, 33 transitions, 142 flow. Second operand 7 states and 811 transitions. [2023-08-30 20:32:22,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 73 transitions, 449 flow [2023-08-30 20:32:22,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 73 transitions, 414 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-08-30 20:32:22,872 INFO L231 Difference]: Finished difference. Result has 44 places, 38 transitions, 200 flow [2023-08-30 20:32:22,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=200, PETRI_PLACES=44, PETRI_TRANSITIONS=38} [2023-08-30 20:32:22,872 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 14 predicate places. [2023-08-30 20:32:22,873 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 38 transitions, 200 flow [2023-08-30 20:32:22,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:22,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:22,873 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] [2023-08-30 20:32:22,883 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:23,079 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,SelfDestructingSolverStorable5 [2023-08-30 20:32:23,079 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:23,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:23,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1999057912, now seen corresponding path program 3 times [2023-08-30 20:32:23,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:23,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081287585] [2023-08-30 20:32:23,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:23,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:23,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:23,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:23,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081287585] [2023-08-30 20:32:23,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081287585] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:23,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215072534] [2023-08-30 20:32:23,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:32:23,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:23,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:23,229 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) [2023-08-30 20:32:23,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 20:32:23,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:32:23,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:23,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:32:23,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:23,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:23,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215072534] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:23,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:32:23,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-08-30 20:32:23,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457598545] [2023-08-30 20:32:23,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:32:23,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:32:23,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:23,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:32:23,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:32:23,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:32:23,571 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 38 transitions, 200 flow. Second operand has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:23,571 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:23,571 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:32:23,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:23,809 INFO L130 PetriNetUnfolder]: 840/1246 cut-off events. [2023-08-30 20:32:23,810 INFO L131 PetriNetUnfolder]: For 2142/2142 co-relation queries the response was YES. [2023-08-30 20:32:23,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4494 conditions, 1246 events. 840/1246 cut-off events. For 2142/2142 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5337 event pairs, 211 based on Foata normal form. 16/1259 useless extension candidates. Maximal degree in co-relation 4469. Up to 612 conditions per place. [2023-08-30 20:32:23,817 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 62 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2023-08-30 20:32:23,818 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 82 transitions, 561 flow [2023-08-30 20:32:23,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:32:23,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:32:23,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 818 transitions. [2023-08-30 20:32:23,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43603411513859275 [2023-08-30 20:32:23,820 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 818 transitions. [2023-08-30 20:32:23,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 818 transitions. [2023-08-30 20:32:23,821 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:23,821 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 818 transitions. [2023-08-30 20:32:23,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 116.85714285714286) internal successors, (818), 7 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:23,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:23,826 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:23,826 INFO L175 Difference]: Start difference. First operand has 44 places, 38 transitions, 200 flow. Second operand 7 states and 818 transitions. [2023-08-30 20:32:23,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 82 transitions, 561 flow [2023-08-30 20:32:23,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 82 transitions, 520 flow, removed 12 selfloop flow, removed 3 redundant places. [2023-08-30 20:32:23,831 INFO L231 Difference]: Finished difference. Result has 50 places, 46 transitions, 310 flow [2023-08-30 20:32:23,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=310, PETRI_PLACES=50, PETRI_TRANSITIONS=46} [2023-08-30 20:32:23,832 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 20 predicate places. [2023-08-30 20:32:23,832 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 46 transitions, 310 flow [2023-08-30 20:32:23,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:23,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:23,833 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] [2023-08-30 20:32:23,844 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:24,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:24,041 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:24,041 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:24,041 INFO L85 PathProgramCache]: Analyzing trace with hash -141700804, now seen corresponding path program 4 times [2023-08-30 20:32:24,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:24,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809661954] [2023-08-30 20:32:24,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:24,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:24,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:24,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809661954] [2023-08-30 20:32:24,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809661954] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:24,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366949094] [2023-08-30 20:32:24,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:32:24,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:24,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:24,142 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) [2023-08-30 20:32:24,168 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 20:32:24,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:32:24,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:24,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:32:24,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:24,340 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:24,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:24,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366949094] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:24,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:32:24,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 13 [2023-08-30 20:32:24,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511128162] [2023-08-30 20:32:24,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:32:24,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:32:24,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:24,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:32:24,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:32:24,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:32:24,505 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 46 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:24,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:24,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:32:24,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:24,732 INFO L130 PetriNetUnfolder]: 824/1230 cut-off events. [2023-08-30 20:32:24,732 INFO L131 PetriNetUnfolder]: For 3281/3281 co-relation queries the response was YES. [2023-08-30 20:32:24,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4829 conditions, 1230 events. 824/1230 cut-off events. For 3281/3281 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 5239 event pairs, 213 based on Foata normal form. 16/1243 useless extension candidates. Maximal degree in co-relation 4801. Up to 676 conditions per place. [2023-08-30 20:32:24,741 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 58 selfloop transitions, 24 changer transitions 0/83 dead transitions. [2023-08-30 20:32:24,742 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 83 transitions, 647 flow [2023-08-30 20:32:24,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:32:24,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:32:24,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 814 transitions. [2023-08-30 20:32:24,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43390191897654584 [2023-08-30 20:32:24,745 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 814 transitions. [2023-08-30 20:32:24,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 814 transitions. [2023-08-30 20:32:24,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:24,746 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 814 transitions. [2023-08-30 20:32:24,748 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 116.28571428571429) internal successors, (814), 7 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:24,750 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:24,751 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:24,751 INFO L175 Difference]: Start difference. First operand has 50 places, 46 transitions, 310 flow. Second operand 7 states and 814 transitions. [2023-08-30 20:32:24,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 83 transitions, 647 flow [2023-08-30 20:32:24,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 83 transitions, 622 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 20:32:24,760 INFO L231 Difference]: Finished difference. Result has 56 places, 54 transitions, 449 flow [2023-08-30 20:32:24,760 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=449, PETRI_PLACES=56, PETRI_TRANSITIONS=54} [2023-08-30 20:32:24,762 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 26 predicate places. [2023-08-30 20:32:24,762 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 54 transitions, 449 flow [2023-08-30 20:32:24,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:24,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:24,763 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] [2023-08-30 20:32:24,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:24,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:24,969 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:24,970 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:24,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1944857512, now seen corresponding path program 5 times [2023-08-30 20:32:24,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:24,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065211477] [2023-08-30 20:32:24,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:24,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:25,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:25,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:25,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065211477] [2023-08-30 20:32:25,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065211477] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:25,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068000230] [2023-08-30 20:32:25,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:32:25,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:25,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:25,129 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) [2023-08-30 20:32:25,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 20:32:25,226 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:32:25,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:32:25,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:25,294 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:25,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:25,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:25,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068000230] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:25,351 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:25,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 14 [2023-08-30 20:32:25,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240057768] [2023-08-30 20:32:25,352 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:25,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:32:25,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:25,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:32:25,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:32:25,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 106 out of 268 [2023-08-30 20:32:25,564 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 54 transitions, 449 flow. Second operand has 14 states, 14 states have (on average 109.14285714285714) internal successors, (1528), 14 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:25,564 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:25,564 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 106 of 268 [2023-08-30 20:32:25,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:25,958 INFO L130 PetriNetUnfolder]: 850/1272 cut-off events. [2023-08-30 20:32:25,958 INFO L131 PetriNetUnfolder]: For 4742/4742 co-relation queries the response was YES. [2023-08-30 20:32:25,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5548 conditions, 1272 events. 850/1272 cut-off events. For 4742/4742 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 5108 event pairs, 36 based on Foata normal form. 14/1285 useless extension candidates. Maximal degree in co-relation 5517. Up to 522 conditions per place. [2023-08-30 20:32:25,967 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 87 selfloop transitions, 43 changer transitions 0/130 dead transitions. [2023-08-30 20:32:25,967 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 130 transitions, 1191 flow [2023-08-30 20:32:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:32:25,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:32:25,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1255 transitions. [2023-08-30 20:32:25,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4257123473541384 [2023-08-30 20:32:25,971 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1255 transitions. [2023-08-30 20:32:25,971 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1255 transitions. [2023-08-30 20:32:25,972 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:25,972 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1255 transitions. [2023-08-30 20:32:25,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 114.0909090909091) internal successors, (1255), 11 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:25,978 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:25,978 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:25,979 INFO L175 Difference]: Start difference. First operand has 56 places, 54 transitions, 449 flow. Second operand 11 states and 1255 transitions. [2023-08-30 20:32:25,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 130 transitions, 1191 flow [2023-08-30 20:32:25,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 130 transitions, 1122 flow, removed 20 selfloop flow, removed 3 redundant places. [2023-08-30 20:32:25,990 INFO L231 Difference]: Finished difference. Result has 67 places, 75 transitions, 723 flow [2023-08-30 20:32:25,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=723, PETRI_PLACES=67, PETRI_TRANSITIONS=75} [2023-08-30 20:32:25,991 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 37 predicate places. [2023-08-30 20:32:25,991 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 75 transitions, 723 flow [2023-08-30 20:32:25,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 109.14285714285714) internal successors, (1528), 14 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:25,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:25,992 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] [2023-08-30 20:32:25,997 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:26,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:26,197 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:26,198 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:26,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1112015240, now seen corresponding path program 6 times [2023-08-30 20:32:26,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:26,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311031207] [2023-08-30 20:32:26,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:26,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:26,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:26,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:26,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:26,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311031207] [2023-08-30 20:32:26,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311031207] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:26,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616216297] [2023-08-30 20:32:26,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:32:26,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:26,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:26,349 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) [2023-08-30 20:32:26,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 20:32:26,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:32:26,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:32:26,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:26,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:26,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616216297] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:26,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:32:26,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 14 [2023-08-30 20:32:26,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006865595] [2023-08-30 20:32:26,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:32:26,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 20:32:26,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:26,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 20:32:26,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:32:26,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:32:26,708 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 75 transitions, 723 flow. Second operand has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:26,708 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:26,708 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:32:26,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:26,936 INFO L130 PetriNetUnfolder]: 823/1215 cut-off events. [2023-08-30 20:32:26,937 INFO L131 PetriNetUnfolder]: For 5383/5383 co-relation queries the response was YES. [2023-08-30 20:32:26,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5568 conditions, 1215 events. 823/1215 cut-off events. For 5383/5383 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4731 event pairs, 206 based on Foata normal form. 14/1226 useless extension candidates. Maximal degree in co-relation 5533. Up to 682 conditions per place. [2023-08-30 20:32:26,947 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 65 selfloop transitions, 36 changer transitions 0/105 dead transitions. [2023-08-30 20:32:26,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 105 transitions, 1062 flow [2023-08-30 20:32:26,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:32:26,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:32:26,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 812 transitions. [2023-08-30 20:32:26,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43283582089552236 [2023-08-30 20:32:26,950 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 812 transitions. [2023-08-30 20:32:26,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 812 transitions. [2023-08-30 20:32:26,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:26,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 812 transitions. [2023-08-30 20:32:26,953 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 116.0) internal successors, (812), 7 states have internal predecessors, (812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:26,955 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:26,955 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:26,955 INFO L175 Difference]: Start difference. First operand has 67 places, 75 transitions, 723 flow. Second operand 7 states and 812 transitions. [2023-08-30 20:32:26,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 105 transitions, 1062 flow [2023-08-30 20:32:26,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 1019 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 20:32:26,971 INFO L231 Difference]: Finished difference. Result has 72 places, 79 transitions, 836 flow [2023-08-30 20:32:26,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=685, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=836, PETRI_PLACES=72, PETRI_TRANSITIONS=79} [2023-08-30 20:32:26,972 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 42 predicate places. [2023-08-30 20:32:26,972 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 79 transitions, 836 flow [2023-08-30 20:32:26,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 111.0) internal successors, (777), 7 states have internal predecessors, (777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:26,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:26,973 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] [2023-08-30 20:32:26,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-30 20:32:27,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:27,183 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:27,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:27,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1943059232, now seen corresponding path program 1 times [2023-08-30 20:32:27,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:27,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456481866] [2023-08-30 20:32:27,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:27,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:27,261 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:27,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456481866] [2023-08-30 20:32:27,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456481866] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:27,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397209825] [2023-08-30 20:32:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:27,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:27,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:27,264 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) [2023-08-30 20:32:27,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 20:32:27,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:27,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 6 conjunts are in the unsatisfiable core [2023-08-30 20:32:27,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:27,396 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:27,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:27,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397209825] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:27,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 20:32:27,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2023-08-30 20:32:27,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696529417] [2023-08-30 20:32:27,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 20:32:27,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 20:32:27,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:27,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 20:32:27,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-08-30 20:32:27,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 268 [2023-08-30 20:32:27,457 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 79 transitions, 836 flow. Second operand has 5 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:27,457 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:27,457 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 268 [2023-08-30 20:32:27,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:27,601 INFO L130 PetriNetUnfolder]: 699/1023 cut-off events. [2023-08-30 20:32:27,601 INFO L131 PetriNetUnfolder]: For 6336/6552 co-relation queries the response was YES. [2023-08-30 20:32:27,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4939 conditions, 1023 events. 699/1023 cut-off events. For 6336/6552 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4169 event pairs, 218 based on Foata normal form. 186/1150 useless extension candidates. Maximal degree in co-relation 4901. Up to 779 conditions per place. [2023-08-30 20:32:27,612 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 81 selfloop transitions, 8 changer transitions 0/100 dead transitions. [2023-08-30 20:32:27,613 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 100 transitions, 1203 flow [2023-08-30 20:32:27,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 20:32:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 20:32:27,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 604 transitions. [2023-08-30 20:32:27,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4507462686567164 [2023-08-30 20:32:27,615 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 604 transitions. [2023-08-30 20:32:27,615 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 604 transitions. [2023-08-30 20:32:27,616 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:27,616 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 604 transitions. [2023-08-30 20:32:27,617 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.8) internal successors, (604), 5 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:27,619 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:27,619 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 268.0) internal successors, (1608), 6 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:27,619 INFO L175 Difference]: Start difference. First operand has 72 places, 79 transitions, 836 flow. Second operand 5 states and 604 transitions. [2023-08-30 20:32:27,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 100 transitions, 1203 flow [2023-08-30 20:32:27,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 100 transitions, 1106 flow, removed 19 selfloop flow, removed 4 redundant places. [2023-08-30 20:32:27,630 INFO L231 Difference]: Finished difference. Result has 73 places, 80 transitions, 789 flow [2023-08-30 20:32:27,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=789, PETRI_PLACES=73, PETRI_TRANSITIONS=80} [2023-08-30 20:32:27,630 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 43 predicate places. [2023-08-30 20:32:27,631 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 80 transitions, 789 flow [2023-08-30 20:32:27,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 118.0) internal successors, (590), 5 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:27,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:27,631 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] [2023-08-30 20:32:27,645 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:27,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:27,846 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:27,847 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:27,847 INFO L85 PathProgramCache]: Analyzing trace with hash 2072621387, now seen corresponding path program 1 times [2023-08-30 20:32:27,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:27,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108560587] [2023-08-30 20:32:27,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:27,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:28,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:28,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108560587] [2023-08-30 20:32:28,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108560587] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:28,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665089051] [2023-08-30 20:32:28,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:28,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:28,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:28,543 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:32:28,545 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 20:32:28,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:28,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 59 conjunts are in the unsatisfiable core [2023-08-30 20:32:28,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:28,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:32:28,931 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 [2023-08-30 20:32:29,035 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:32:29,037 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:29,037 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-30 20:32:29,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:29,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:29,252 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:29,253 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 38 [2023-08-30 20:32:29,260 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 17 treesize of output 11 [2023-08-30 20:32:29,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:29,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665089051] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:29,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:29,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 23 [2023-08-30 20:32:29,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653368683] [2023-08-30 20:32:29,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:29,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 20:32:29,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:29,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 20:32:29,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=515, Unknown=1, NotChecked=0, Total=600 [2023-08-30 20:32:30,699 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 268 [2023-08-30 20:32:30,701 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 80 transitions, 789 flow. Second operand has 25 states, 25 states have (on average 80.04) internal successors, (2001), 25 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:30,701 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:30,701 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 268 [2023-08-30 20:32:30,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:32,014 INFO L130 PetriNetUnfolder]: 1474/2221 cut-off events. [2023-08-30 20:32:32,014 INFO L131 PetriNetUnfolder]: For 10370/10634 co-relation queries the response was YES. [2023-08-30 20:32:32,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10709 conditions, 2221 events. 1474/2221 cut-off events. For 10370/10634 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 10388 event pairs, 91 based on Foata normal form. 222/2439 useless extension candidates. Maximal degree in co-relation 10009. Up to 1209 conditions per place. [2023-08-30 20:32:32,033 INFO L137 encePairwiseOnDemand]: 257/268 looper letters, 147 selfloop transitions, 126 changer transitions 4/283 dead transitions. [2023-08-30 20:32:32,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 283 transitions, 2995 flow [2023-08-30 20:32:32,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-08-30 20:32:32,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-08-30 20:32:32,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 1401 transitions. [2023-08-30 20:32:32,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3267257462686567 [2023-08-30 20:32:32,038 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 1401 transitions. [2023-08-30 20:32:32,038 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 1401 transitions. [2023-08-30 20:32:32,038 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:32,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 1401 transitions. [2023-08-30 20:32:32,041 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 87.5625) internal successors, (1401), 16 states have internal predecessors, (1401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:32,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 268.0) internal successors, (4556), 17 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:32,047 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 268.0) internal successors, (4556), 17 states have internal predecessors, (4556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:32,047 INFO L175 Difference]: Start difference. First operand has 73 places, 80 transitions, 789 flow. Second operand 16 states and 1401 transitions. [2023-08-30 20:32:32,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 283 transitions, 2995 flow [2023-08-30 20:32:32,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 283 transitions, 2957 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 20:32:32,072 INFO L231 Difference]: Finished difference. Result has 92 places, 181 transitions, 2247 flow [2023-08-30 20:32:32,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=775, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=2247, PETRI_PLACES=92, PETRI_TRANSITIONS=181} [2023-08-30 20:32:32,073 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 62 predicate places. [2023-08-30 20:32:32,073 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 181 transitions, 2247 flow [2023-08-30 20:32:32,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 80.04) internal successors, (2001), 25 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:32,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:32,074 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] [2023-08-30 20:32:32,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:32,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-30 20:32:32,277 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:32,277 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1602150613, now seen corresponding path program 1 times [2023-08-30 20:32:32,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:32,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197240362] [2023-08-30 20:32:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:32,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:32,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:32,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197240362] [2023-08-30 20:32:32,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197240362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:32,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104558600] [2023-08-30 20:32:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:32,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:32,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:32,622 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:32:32,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 20:32:32,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:32,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 20:32:32,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:32,775 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 [2023-08-30 20:32:32,812 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 [2023-08-30 20:32:32,851 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 [2023-08-30 20:32:32,878 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 [2023-08-30 20:32:32,944 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 22 treesize of output 10 [2023-08-30 20:32:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:32,957 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:33,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104558600] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:33,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:33,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 4] total 13 [2023-08-30 20:32:33,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067509250] [2023-08-30 20:32:33,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:33,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-30 20:32:33,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:33,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-30 20:32:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2023-08-30 20:32:33,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 103 out of 268 [2023-08-30 20:32:33,337 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 181 transitions, 2247 flow. Second operand has 15 states, 15 states have (on average 106.0) internal successors, (1590), 15 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:33,337 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:33,338 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 103 of 268 [2023-08-30 20:32:33,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:33,978 INFO L130 PetriNetUnfolder]: 2293/3450 cut-off events. [2023-08-30 20:32:33,978 INFO L131 PetriNetUnfolder]: For 26439/26802 co-relation queries the response was YES. [2023-08-30 20:32:33,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19287 conditions, 3450 events. 2293/3450 cut-off events. For 26439/26802 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 17516 event pairs, 188 based on Foata normal form. 293/3669 useless extension candidates. Maximal degree in co-relation 18044. Up to 2277 conditions per place. [2023-08-30 20:32:34,004 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 165 selfloop transitions, 144 changer transitions 1/318 dead transitions. [2023-08-30 20:32:34,004 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 318 transitions, 4320 flow [2023-08-30 20:32:34,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:32:34,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:32:34,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 914 transitions. [2023-08-30 20:32:34,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42630597014925375 [2023-08-30 20:32:34,007 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 914 transitions. [2023-08-30 20:32:34,007 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 914 transitions. [2023-08-30 20:32:34,008 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:34,008 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 914 transitions. [2023-08-30 20:32:34,010 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 114.25) internal successors, (914), 8 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:34,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:34,013 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:34,013 INFO L175 Difference]: Start difference. First operand has 92 places, 181 transitions, 2247 flow. Second operand 8 states and 914 transitions. [2023-08-30 20:32:34,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 318 transitions, 4320 flow [2023-08-30 20:32:34,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 318 transitions, 4124 flow, removed 97 selfloop flow, removed 1 redundant places. [2023-08-30 20:32:34,066 INFO L231 Difference]: Finished difference. Result has 102 places, 254 transitions, 3488 flow [2023-08-30 20:32:34,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=2129, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3488, PETRI_PLACES=102, PETRI_TRANSITIONS=254} [2023-08-30 20:32:34,066 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 72 predicate places. [2023-08-30 20:32:34,067 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 254 transitions, 3488 flow [2023-08-30 20:32:34,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 106.0) internal successors, (1590), 15 states have internal predecessors, (1590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:34,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:34,067 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] [2023-08-30 20:32:34,076 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:34,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-30 20:32:34,274 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:34,274 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:34,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1383538529, now seen corresponding path program 2 times [2023-08-30 20:32:34,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:34,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511686751] [2023-08-30 20:32:34,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:34,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:34,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:34,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:34,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511686751] [2023-08-30 20:32:34,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511686751] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:34,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832115008] [2023-08-30 20:32:34,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:32:34,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:34,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:34,608 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:32:34,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 20:32:34,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:32:34,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:34,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 20:32:34,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:34,850 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 22 treesize of output 10 [2023-08-30 20:32:34,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:34,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:34,906 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:34,906 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:32:34,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:34,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832115008] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:34,939 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:34,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-30 20:32:34,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997585563] [2023-08-30 20:32:34,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:34,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:32:34,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:34,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:32:34,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:32:35,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 268 [2023-08-30 20:32:35,066 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 254 transitions, 3488 flow. Second operand has 11 states, 11 states have (on average 115.45454545454545) internal successors, (1270), 11 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:35,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:35,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 268 [2023-08-30 20:32:35,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:35,828 INFO L130 PetriNetUnfolder]: 2863/4300 cut-off events. [2023-08-30 20:32:35,829 INFO L131 PetriNetUnfolder]: For 41105/41630 co-relation queries the response was YES. [2023-08-30 20:32:35,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26217 conditions, 4300 events. 2863/4300 cut-off events. For 41105/41630 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 22668 event pairs, 552 based on Foata normal form. 431/4615 useless extension candidates. Maximal degree in co-relation 24563. Up to 3447 conditions per place. [2023-08-30 20:32:35,875 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 237 selfloop transitions, 132 changer transitions 1/378 dead transitions. [2023-08-30 20:32:35,875 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 378 transitions, 5719 flow [2023-08-30 20:32:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:32:35,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:32:35,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 865 transitions. [2023-08-30 20:32:35,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4610874200426439 [2023-08-30 20:32:35,878 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 865 transitions. [2023-08-30 20:32:35,878 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 865 transitions. [2023-08-30 20:32:35,879 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:35,879 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 865 transitions. [2023-08-30 20:32:35,881 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.57142857142857) internal successors, (865), 7 states have internal predecessors, (865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:35,884 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:35,884 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:35,884 INFO L175 Difference]: Start difference. First operand has 102 places, 254 transitions, 3488 flow. Second operand 7 states and 865 transitions. [2023-08-30 20:32:35,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 378 transitions, 5719 flow [2023-08-30 20:32:35,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 378 transitions, 5552 flow, removed 43 selfloop flow, removed 2 redundant places. [2023-08-30 20:32:35,966 INFO L231 Difference]: Finished difference. Result has 109 places, 323 transitions, 4796 flow [2023-08-30 20:32:35,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4796, PETRI_PLACES=109, PETRI_TRANSITIONS=323} [2023-08-30 20:32:35,967 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 79 predicate places. [2023-08-30 20:32:35,967 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 323 transitions, 4796 flow [2023-08-30 20:32:35,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 115.45454545454545) internal successors, (1270), 11 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:35,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:35,967 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] [2023-08-30 20:32:35,977 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:36,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-30 20:32:36,173 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:36,174 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:36,174 INFO L85 PathProgramCache]: Analyzing trace with hash 403272333, now seen corresponding path program 3 times [2023-08-30 20:32:36,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:36,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686972355] [2023-08-30 20:32:36,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:36,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:36,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:36,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:36,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686972355] [2023-08-30 20:32:36,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686972355] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:36,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183533489] [2023-08-30 20:32:36,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:32:36,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:36,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:36,554 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:32:36,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 20:32:36,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:32:36,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:36,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 20:32:36,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:36,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:32:36,820 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 [2023-08-30 20:32:36,848 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 [2023-08-30 20:32:36,857 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:36,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:36,909 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_571 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_571) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-08-30 20:32:36,921 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:36,922 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2023-08-30 20:32:36,925 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 13 treesize of output 11 [2023-08-30 20:32:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-30 20:32:36,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183533489] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:36,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:36,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 20:32:36,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524013377] [2023-08-30 20:32:36,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:36,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:32:36,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:36,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:32:36,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=271, Unknown=2, NotChecked=34, Total=380 [2023-08-30 20:32:37,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-08-30 20:32:37,059 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 323 transitions, 4796 flow. Second operand has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:37,059 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:37,059 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-08-30 20:32:37,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:38,033 INFO L130 PetriNetUnfolder]: 3264/4913 cut-off events. [2023-08-30 20:32:38,034 INFO L131 PetriNetUnfolder]: For 50847/51506 co-relation queries the response was YES. [2023-08-30 20:32:38,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31355 conditions, 4913 events. 3264/4913 cut-off events. For 50847/51506 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26822 event pairs, 295 based on Foata normal form. 545/5323 useless extension candidates. Maximal degree in co-relation 29641. Up to 2800 conditions per place. [2023-08-30 20:32:38,076 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 157 selfloop transitions, 253 changer transitions 1/419 dead transitions. [2023-08-30 20:32:38,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 419 transitions, 6615 flow [2023-08-30 20:32:38,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:32:38,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:32:38,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 754 transitions. [2023-08-30 20:32:38,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40191897654584224 [2023-08-30 20:32:38,079 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 754 transitions. [2023-08-30 20:32:38,079 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 754 transitions. [2023-08-30 20:32:38,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:38,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 754 transitions. [2023-08-30 20:32:38,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 107.71428571428571) internal successors, (754), 7 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:38,083 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:38,084 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:38,084 INFO L175 Difference]: Start difference. First operand has 109 places, 323 transitions, 4796 flow. Second operand 7 states and 754 transitions. [2023-08-30 20:32:38,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 419 transitions, 6615 flow [2023-08-30 20:32:38,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 419 transitions, 6400 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-30 20:32:38,205 INFO L231 Difference]: Finished difference. Result has 115 places, 361 transitions, 5880 flow [2023-08-30 20:32:38,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=4581, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5880, PETRI_PLACES=115, PETRI_TRANSITIONS=361} [2023-08-30 20:32:38,206 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 85 predicate places. [2023-08-30 20:32:38,206 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 361 transitions, 5880 flow [2023-08-30 20:32:38,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:38,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:38,207 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] [2023-08-30 20:32:38,215 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-08-30 20:32:38,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 20:32:38,412 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:38,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:38,414 INFO L85 PathProgramCache]: Analyzing trace with hash -399472957, now seen corresponding path program 4 times [2023-08-30 20:32:38,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:38,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323269190] [2023-08-30 20:32:38,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:38,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:38,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:38,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:38,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:38,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323269190] [2023-08-30 20:32:38,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323269190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:38,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539476222] [2023-08-30 20:32:38,875 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:32:38,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:38,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:38,877 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:32:38,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 20:32:38,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:32:38,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:38,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 20:32:38,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:39,032 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 [2023-08-30 20:32:39,063 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 [2023-08-30 20:32:39,098 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 [2023-08-30 20:32:39,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:32:39,225 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 [2023-08-30 20:32:39,276 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 22 treesize of output 10 [2023-08-30 20:32:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:39,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:39,490 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_618 (Array Int Int)) (v_ArrVal_619 (Array Int Int)) (v_ArrVal_620 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_618) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_619))) (= (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_620) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (+ c_~res1~0 (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|))))) is different from false [2023-08-30 20:32:39,499 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:39,500 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 54 treesize of output 43 [2023-08-30 20:32:39,512 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 634 treesize of output 594 [2023-08-30 20:32:39,525 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 124 treesize of output 116 [2023-08-30 20:32:39,529 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 116 treesize of output 112 [2023-08-30 20:32:39,535 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 56 treesize of output 54 [2023-08-30 20:32:39,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 20:32:39,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539476222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:39,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:39,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2023-08-30 20:32:39,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843377092] [2023-08-30 20:32:39,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:39,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:32:39,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:32:39,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=390, Unknown=16, NotChecked=42, Total=552 [2023-08-30 20:32:39,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-08-30 20:32:39,672 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 361 transitions, 5880 flow. Second operand has 24 states, 24 states have (on average 86.04166666666667) internal successors, (2065), 24 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:39,672 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:39,672 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-08-30 20:32:39,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:40,004 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_620 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_620) c_~A~0.base) c_~A~0.offset) c_~res2~0))) (= c_~res2~0 c_~res1~0) (forall ((v_ArrVal_619 (Array Int Int)) (v_ArrVal_620 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_619))) (= (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_620) c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ c_~res1~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)))))) is different from false [2023-08-30 20:32:40,816 INFO L130 PetriNetUnfolder]: 3623/5447 cut-off events. [2023-08-30 20:32:40,816 INFO L131 PetriNetUnfolder]: For 71674/72496 co-relation queries the response was YES. [2023-08-30 20:32:40,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37467 conditions, 5447 events. 3623/5447 cut-off events. For 71674/72496 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 30216 event pairs, 753 based on Foata normal form. 692/5984 useless extension candidates. Maximal degree in co-relation 35666. Up to 4358 conditions per place. [2023-08-30 20:32:40,860 INFO L137 encePairwiseOnDemand]: 251/268 looper letters, 278 selfloop transitions, 167 changer transitions 1/454 dead transitions. [2023-08-30 20:32:40,861 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 454 transitions, 7723 flow [2023-08-30 20:32:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:32:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:32:40,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 933 transitions. [2023-08-30 20:32:40,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34813432835820896 [2023-08-30 20:32:40,864 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 933 transitions. [2023-08-30 20:32:40,864 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 933 transitions. [2023-08-30 20:32:40,864 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:40,864 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 933 transitions. [2023-08-30 20:32:40,866 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.3) internal successors, (933), 10 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:40,868 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:40,869 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:40,869 INFO L175 Difference]: Start difference. First operand has 115 places, 361 transitions, 5880 flow. Second operand 10 states and 933 transitions. [2023-08-30 20:32:40,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 454 transitions, 7723 flow [2023-08-30 20:32:41,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 454 transitions, 7532 flow, removed 46 selfloop flow, removed 2 redundant places. [2023-08-30 20:32:41,129 INFO L231 Difference]: Finished difference. Result has 125 places, 399 transitions, 6675 flow [2023-08-30 20:32:41,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=5709, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6675, PETRI_PLACES=125, PETRI_TRANSITIONS=399} [2023-08-30 20:32:41,130 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 95 predicate places. [2023-08-30 20:32:41,130 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 399 transitions, 6675 flow [2023-08-30 20:32:41,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.04166666666667) internal successors, (2065), 24 states have internal predecessors, (2065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:41,130 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:41,131 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] [2023-08-30 20:32:41,135 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:41,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-30 20:32:41,331 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:41,331 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:41,331 INFO L85 PathProgramCache]: Analyzing trace with hash 568034103, now seen corresponding path program 2 times [2023-08-30 20:32:41,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:41,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728231750] [2023-08-30 20:32:41,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:41,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:41,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:41,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:41,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728231750] [2023-08-30 20:32:41,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728231750] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:41,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968250155] [2023-08-30 20:32:41,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:32:41,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:41,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:41,797 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:32:41,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-30 20:32:41,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:32:41,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:41,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 20:32:41,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:42,138 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:32:42,140 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:42,140 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-30 20:32:42,149 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:42,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:42,177 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:42,178 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:32:42,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:42,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968250155] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:42,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:42,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 23 [2023-08-30 20:32:42,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381133001] [2023-08-30 20:32:42,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:42,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-08-30 20:32:42,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:42,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-08-30 20:32:42,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=486, Unknown=0, NotChecked=0, Total=600 [2023-08-30 20:32:42,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-08-30 20:32:42,940 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 399 transitions, 6675 flow. Second operand has 25 states, 25 states have (on average 99.2) internal successors, (2480), 25 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:42,940 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:42,940 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-08-30 20:32:42,940 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:44,227 INFO L130 PetriNetUnfolder]: 4231/6382 cut-off events. [2023-08-30 20:32:44,227 INFO L131 PetriNetUnfolder]: For 74159/74159 co-relation queries the response was YES. [2023-08-30 20:32:44,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45726 conditions, 6382 events. 4231/6382 cut-off events. For 74159/74159 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 34994 event pairs, 1102 based on Foata normal form. 4/6366 useless extension candidates. Maximal degree in co-relation 43761. Up to 5758 conditions per place. [2023-08-30 20:32:44,273 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 374 selfloop transitions, 129 changer transitions 2/505 dead transitions. [2023-08-30 20:32:44,273 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 505 transitions, 8727 flow [2023-08-30 20:32:44,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 20:32:44,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 20:32:44,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1578 transitions. [2023-08-30 20:32:44,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925373134328358 [2023-08-30 20:32:44,277 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1578 transitions. [2023-08-30 20:32:44,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1578 transitions. [2023-08-30 20:32:44,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:44,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1578 transitions. [2023-08-30 20:32:44,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 105.2) internal successors, (1578), 15 states have internal predecessors, (1578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:44,285 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:44,285 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:44,285 INFO L175 Difference]: Start difference. First operand has 125 places, 399 transitions, 6675 flow. Second operand 15 states and 1578 transitions. [2023-08-30 20:32:44,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 505 transitions, 8727 flow [2023-08-30 20:32:44,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 505 transitions, 8530 flow, removed 43 selfloop flow, removed 4 redundant places. [2023-08-30 20:32:44,501 INFO L231 Difference]: Finished difference. Result has 141 places, 432 transitions, 7290 flow [2023-08-30 20:32:44,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=6482, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=7290, PETRI_PLACES=141, PETRI_TRANSITIONS=432} [2023-08-30 20:32:44,502 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 111 predicate places. [2023-08-30 20:32:44,502 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 432 transitions, 7290 flow [2023-08-30 20:32:44,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 99.2) internal successors, (2480), 25 states have internal predecessors, (2480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:44,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:44,503 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] [2023-08-30 20:32:44,509 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-30 20:32:44,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-30 20:32:44,709 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:44,709 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:44,710 INFO L85 PathProgramCache]: Analyzing trace with hash -697470791, now seen corresponding path program 3 times [2023-08-30 20:32:44,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:44,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664153114] [2023-08-30 20:32:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:44,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:44,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:45,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:45,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:45,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664153114] [2023-08-30 20:32:45,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664153114] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:45,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163674295] [2023-08-30 20:32:45,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:32:45,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:45,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:45,256 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:32:45,283 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-30 20:32:45,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:32:45,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:45,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 20:32:45,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:45,687 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:32:45,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:45,688 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-30 20:32:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:45,697 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:45,726 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:45,726 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:32:45,986 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:45,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163674295] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:45,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:45,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 21 [2023-08-30 20:32:45,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396373952] [2023-08-30 20:32:45,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:45,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 20:32:45,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:45,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 20:32:45,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2023-08-30 20:32:46,915 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 268 [2023-08-30 20:32:46,916 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 432 transitions, 7290 flow. Second operand has 23 states, 23 states have (on average 101.26086956521739) internal successors, (2329), 23 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:46,916 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:46,916 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 268 [2023-08-30 20:32:46,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:48,420 INFO L130 PetriNetUnfolder]: 4317/6561 cut-off events. [2023-08-30 20:32:48,421 INFO L131 PetriNetUnfolder]: For 77719/78047 co-relation queries the response was YES. [2023-08-30 20:32:48,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48011 conditions, 6561 events. 4317/6561 cut-off events. For 77719/78047 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 37667 event pairs, 785 based on Foata normal form. 222/6698 useless extension candidates. Maximal degree in co-relation 47387. Up to 5043 conditions per place. [2023-08-30 20:32:48,466 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 313 selfloop transitions, 235 changer transitions 4/567 dead transitions. [2023-08-30 20:32:48,466 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 567 transitions, 9938 flow [2023-08-30 20:32:48,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:32:48,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:32:48,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1503 transitions. [2023-08-30 20:32:48,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4005863539445629 [2023-08-30 20:32:48,476 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1503 transitions. [2023-08-30 20:32:48,476 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1503 transitions. [2023-08-30 20:32:48,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:48,476 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1503 transitions. [2023-08-30 20:32:48,478 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 107.35714285714286) internal successors, (1503), 14 states have internal predecessors, (1503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:48,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:48,482 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:48,482 INFO L175 Difference]: Start difference. First operand has 141 places, 432 transitions, 7290 flow. Second operand 14 states and 1503 transitions. [2023-08-30 20:32:48,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 567 transitions, 9938 flow [2023-08-30 20:32:48,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 567 transitions, 9644 flow, removed 77 selfloop flow, removed 5 redundant places. [2023-08-30 20:32:48,742 INFO L231 Difference]: Finished difference. Result has 154 places, 499 transitions, 8717 flow [2023-08-30 20:32:48,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=7049, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=8717, PETRI_PLACES=154, PETRI_TRANSITIONS=499} [2023-08-30 20:32:48,743 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 124 predicate places. [2023-08-30 20:32:48,743 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 499 transitions, 8717 flow [2023-08-30 20:32:48,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 101.26086956521739) internal successors, (2329), 23 states have internal predecessors, (2329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:48,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:48,744 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] [2023-08-30 20:32:48,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:48,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:48,949 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:48,949 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:48,949 INFO L85 PathProgramCache]: Analyzing trace with hash -1676074169, now seen corresponding path program 4 times [2023-08-30 20:32:48,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:48,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805947349] [2023-08-30 20:32:48,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:48,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:48,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:49,381 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:49,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:49,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805947349] [2023-08-30 20:32:49,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805947349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:49,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068233760] [2023-08-30 20:32:49,382 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:32:49,382 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:49,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:49,383 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:32:49,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-30 20:32:49,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:32:49,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:49,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 64 conjunts are in the unsatisfiable core [2023-08-30 20:32:49,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:49,559 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 [2023-08-30 20:32:49,599 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 [2023-08-30 20:32:49,638 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 [2023-08-30 20:32:49,671 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 [2023-08-30 20:32:49,874 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:49,875 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-08-30 20:32:49,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:49,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:50,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:50,418 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 61 treesize of output 50 [2023-08-30 20:32:50,430 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:50,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 398 treesize of output 382 [2023-08-30 20:32:50,448 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:50,452 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 174 [2023-08-30 20:32:50,464 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:50,464 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 166 treesize of output 142 [2023-08-30 20:32:50,476 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:50,477 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 70 treesize of output 71 [2023-08-30 20:32:50,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:50,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068233760] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:50,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:50,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 12] total 29 [2023-08-30 20:32:50,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167869738] [2023-08-30 20:32:50,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:50,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-08-30 20:32:50,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:50,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-08-30 20:32:50,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=768, Unknown=8, NotChecked=0, Total=930 [2023-08-30 20:32:51,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 69 out of 268 [2023-08-30 20:32:51,903 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 499 transitions, 8717 flow. Second operand has 31 states, 31 states have (on average 70.90322580645162) internal successors, (2198), 31 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:51,903 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:51,903 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 69 of 268 [2023-08-30 20:32:51,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:54,618 INFO L130 PetriNetUnfolder]: 5214/7884 cut-off events. [2023-08-30 20:32:54,618 INFO L131 PetriNetUnfolder]: For 101968/101968 co-relation queries the response was YES. [2023-08-30 20:32:54,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60196 conditions, 7884 events. 5214/7884 cut-off events. For 101968/101968 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 45055 event pairs, 1222 based on Foata normal form. 1/7885 useless extension candidates. Maximal degree in co-relation 59537. Up to 6224 conditions per place. [2023-08-30 20:32:54,688 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 420 selfloop transitions, 338 changer transitions 3/761 dead transitions. [2023-08-30 20:32:54,689 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 761 transitions, 13666 flow [2023-08-30 20:32:54,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-08-30 20:32:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-08-30 20:32:54,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2724 transitions. [2023-08-30 20:32:54,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.28233830845771146 [2023-08-30 20:32:54,693 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2724 transitions. [2023-08-30 20:32:54,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2724 transitions. [2023-08-30 20:32:54,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:54,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2724 transitions. [2023-08-30 20:32:54,698 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 75.66666666666667) internal successors, (2724), 36 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:54,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 268.0) internal successors, (9916), 37 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:54,707 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 268.0) internal successors, (9916), 37 states have internal predecessors, (9916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:54,707 INFO L175 Difference]: Start difference. First operand has 154 places, 499 transitions, 8717 flow. Second operand 36 states and 2724 transitions. [2023-08-30 20:32:54,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 761 transitions, 13666 flow [2023-08-30 20:32:55,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 761 transitions, 13543 flow, removed 45 selfloop flow, removed 4 redundant places. [2023-08-30 20:32:55,090 INFO L231 Difference]: Finished difference. Result has 198 places, 647 transitions, 12295 flow [2023-08-30 20:32:55,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=8619, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=202, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=239, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=12295, PETRI_PLACES=198, PETRI_TRANSITIONS=647} [2023-08-30 20:32:55,091 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 168 predicate places. [2023-08-30 20:32:55,091 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 647 transitions, 12295 flow [2023-08-30 20:32:55,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 70.90322580645162) internal successors, (2198), 31 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:55,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:55,092 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] [2023-08-30 20:32:55,101 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:55,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:55,297 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:55,298 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:55,298 INFO L85 PathProgramCache]: Analyzing trace with hash 579004593, now seen corresponding path program 5 times [2023-08-30 20:32:55,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:55,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695403451] [2023-08-30 20:32:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:55,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:55,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:55,694 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:55,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:55,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695403451] [2023-08-30 20:32:55,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695403451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:55,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468981780] [2023-08-30 20:32:55,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:32:55,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:55,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:55,697 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:32:55,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-30 20:32:55,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:32:55,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:55,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 20:32:55,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:55,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:32:55,954 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 [2023-08-30 20:32:55,974 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 [2023-08-30 20:32:55,984 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:55,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:56,034 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:56,034 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 38 [2023-08-30 20:32:56,038 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 17 treesize of output 11 [2023-08-30 20:32:56,128 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:56,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468981780] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:56,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:56,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 20:32:56,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584505435] [2023-08-30 20:32:56,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:56,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:32:56,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:56,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:32:56,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=291, Unknown=4, NotChecked=0, Total=380 [2023-08-30 20:32:56,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-08-30 20:32:56,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 647 transitions, 12295 flow. Second operand has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:56,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:56,406 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-08-30 20:32:56,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:32:57,802 INFO L130 PetriNetUnfolder]: 4945/7487 cut-off events. [2023-08-30 20:32:57,802 INFO L131 PetriNetUnfolder]: For 134537/135335 co-relation queries the response was YES. [2023-08-30 20:32:57,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62376 conditions, 7487 events. 4945/7487 cut-off events. For 134537/135335 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 43923 event pairs, 991 based on Foata normal form. 532/7804 useless extension candidates. Maximal degree in co-relation 62058. Up to 6689 conditions per place. [2023-08-30 20:32:57,864 INFO L137 encePairwiseOnDemand]: 261/268 looper letters, 490 selfloop transitions, 182 changer transitions 1/692 dead transitions. [2023-08-30 20:32:57,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 692 transitions, 14160 flow [2023-08-30 20:32:57,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:32:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:32:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 741 transitions. [2023-08-30 20:32:57,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39498933901918976 [2023-08-30 20:32:57,866 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 741 transitions. [2023-08-30 20:32:57,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 741 transitions. [2023-08-30 20:32:57,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:32:57,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 741 transitions. [2023-08-30 20:32:57,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.85714285714286) internal successors, (741), 7 states have internal predecessors, (741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:57,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:57,870 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:57,870 INFO L175 Difference]: Start difference. First operand has 198 places, 647 transitions, 12295 flow. Second operand 7 states and 741 transitions. [2023-08-30 20:32:57,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 692 transitions, 14160 flow [2023-08-30 20:32:58,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 692 transitions, 13814 flow, removed 155 selfloop flow, removed 5 redundant places. [2023-08-30 20:32:58,301 INFO L231 Difference]: Finished difference. Result has 200 places, 652 transitions, 12453 flow [2023-08-30 20:32:58,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=11953, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=177, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12453, PETRI_PLACES=200, PETRI_TRANSITIONS=652} [2023-08-30 20:32:58,302 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 170 predicate places. [2023-08-30 20:32:58,302 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 652 transitions, 12453 flow [2023-08-30 20:32:58,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.35) internal successors, (1947), 20 states have internal predecessors, (1947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:58,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:32:58,303 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] [2023-08-30 20:32:58,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-30 20:32:58,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:58,508 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:32:58,509 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:32:58,509 INFO L85 PathProgramCache]: Analyzing trace with hash 149621397, now seen corresponding path program 6 times [2023-08-30 20:32:58,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:32:58,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209096330] [2023-08-30 20:32:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:32:58,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:32:58,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:32:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:32:58,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:32:58,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209096330] [2023-08-30 20:32:58,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209096330] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:32:58,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820278405] [2023-08-30 20:32:58,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:32:58,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:32:58,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:32:58,904 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:32:58,905 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-30 20:32:59,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:32:59,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:32:59,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 60 conjunts are in the unsatisfiable core [2023-08-30 20:32:59,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:32:59,047 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 [2023-08-30 20:32:59,093 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 [2023-08-30 20:32:59,127 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 [2023-08-30 20:32:59,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:32:59,234 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 [2023-08-30 20:32:59,283 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 22 treesize of output 10 [2023-08-30 20:32:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:32:59,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:32:59,329 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_851 (Array Int Int))) (= c_~res1~0 (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_851) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))))) is different from false [2023-08-30 20:32:59,337 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_851 (Array Int Int))) (= (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_851) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0))) is different from false [2023-08-30 20:32:59,363 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_851 (Array Int Int))) (= (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_851) c_~A~0.base) c_~A~0.offset)) (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0))) is different from false [2023-08-30 20:32:59,371 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_850 (Array Int Int)) (v_ArrVal_851 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_850))) (= (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_851) c_~A~0.base) c_~A~0.offset)) (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~res1~0)))) is different from false [2023-08-30 20:32:59,380 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_849 (Array Int Int)) (v_ArrVal_850 (Array Int Int)) (v_ArrVal_851 (Array Int Int))) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_849) |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_850))) (= (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res1~0) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_851) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res2~0)))) is different from false [2023-08-30 20:32:59,386 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:32:59,386 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 54 treesize of output 43 [2023-08-30 20:32:59,389 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 1278 treesize of output 1198 [2023-08-30 20:32:59,402 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 62 treesize of output 60 [2023-08-30 20:32:59,405 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 122 treesize of output 114 [2023-08-30 20:32:59,407 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 114 treesize of output 110 [2023-08-30 20:32:59,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2023-08-30 20:32:59,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820278405] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:32:59,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:32:59,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2023-08-30 20:32:59,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424697207] [2023-08-30 20:32:59,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:32:59,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:32:59,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:32:59,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:32:59,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=269, Unknown=7, NotChecked=190, Total=552 [2023-08-30 20:32:59,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-08-30 20:32:59,501 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 652 transitions, 12453 flow. Second operand has 24 states, 24 states have (on average 86.0) internal successors, (2064), 24 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:32:59,501 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:32:59,501 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-08-30 20:32:59,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:33:01,349 INFO L130 PetriNetUnfolder]: 5069/7671 cut-off events. [2023-08-30 20:33:01,350 INFO L131 PetriNetUnfolder]: For 142254/143145 co-relation queries the response was YES. [2023-08-30 20:33:01,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64378 conditions, 7671 events. 5069/7671 cut-off events. For 142254/143145 co-relation queries the response was YES. Maximal size of possible extension queue 517. Compared 45237 event pairs, 974 based on Foata normal form. 544/7997 useless extension candidates. Maximal degree in co-relation 64106. Up to 6166 conditions per place. [2023-08-30 20:33:01,411 INFO L137 encePairwiseOnDemand]: 255/268 looper letters, 438 selfloop transitions, 300 changer transitions 1/758 dead transitions. [2023-08-30 20:33:01,411 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 758 transitions, 15743 flow [2023-08-30 20:33:01,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:33:01,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:33:01,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 933 transitions. [2023-08-30 20:33:01,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34813432835820896 [2023-08-30 20:33:01,413 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 933 transitions. [2023-08-30 20:33:01,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 933 transitions. [2023-08-30 20:33:01,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:33:01,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 933 transitions. [2023-08-30 20:33:01,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.3) internal successors, (933), 10 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:01,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:01,417 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:01,417 INFO L175 Difference]: Start difference. First operand has 200 places, 652 transitions, 12453 flow. Second operand 10 states and 933 transitions. [2023-08-30 20:33:01,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 758 transitions, 15743 flow [2023-08-30 20:33:01,837 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 758 transitions, 15341 flow, removed 27 selfloop flow, removed 5 redundant places. [2023-08-30 20:33:01,849 INFO L231 Difference]: Finished difference. Result has 207 places, 707 transitions, 14065 flow [2023-08-30 20:33:01,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=12117, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=245, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14065, PETRI_PLACES=207, PETRI_TRANSITIONS=707} [2023-08-30 20:33:01,850 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 177 predicate places. [2023-08-30 20:33:01,850 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 707 transitions, 14065 flow [2023-08-30 20:33:01,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 86.0) internal successors, (2064), 24 states have internal predecessors, (2064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:01,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:33:01,850 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] [2023-08-30 20:33:01,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-08-30 20:33:02,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:02,051 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:33:02,051 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:33:02,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1065189005, now seen corresponding path program 7 times [2023-08-30 20:33:02,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:33:02,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564573235] [2023-08-30 20:33:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:33:02,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:33:02,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:33:02,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:02,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:33:02,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564573235] [2023-08-30 20:33:02,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564573235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:33:02,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221744861] [2023-08-30 20:33:02,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:33:02,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:02,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:33:02,293 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:33:02,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-08-30 20:33:02,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:33:02,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 45 conjunts are in the unsatisfiable core [2023-08-30 20:33:02,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:33:02,470 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 [2023-08-30 20:33:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:02,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:33:02,505 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:33:02,505 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:33:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:02,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221744861] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:33:02,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:33:02,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-30 20:33:02,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116634585] [2023-08-30 20:33:02,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:33:02,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:33:02,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:33:02,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:33:02,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:33:02,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 268 [2023-08-30 20:33:02,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 707 transitions, 14065 flow. Second operand has 11 states, 11 states have (on average 115.27272727272727) internal successors, (1268), 11 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:02,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:33:02,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 268 [2023-08-30 20:33:02,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:33:04,179 INFO L130 PetriNetUnfolder]: 5175/7838 cut-off events. [2023-08-30 20:33:04,180 INFO L131 PetriNetUnfolder]: For 155726/156661 co-relation queries the response was YES. [2023-08-30 20:33:04,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67497 conditions, 7838 events. 5175/7838 cut-off events. For 155726/156661 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 46522 event pairs, 1070 based on Foata normal form. 557/8171 useless extension candidates. Maximal degree in co-relation 67221. Up to 6751 conditions per place. [2023-08-30 20:33:04,246 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 509 selfloop transitions, 251 changer transitions 1/780 dead transitions. [2023-08-30 20:33:04,246 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 780 transitions, 16675 flow [2023-08-30 20:33:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:33:04,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:33:04,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 862 transitions. [2023-08-30 20:33:04,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4594882729211087 [2023-08-30 20:33:04,248 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 862 transitions. [2023-08-30 20:33:04,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 862 transitions. [2023-08-30 20:33:04,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:33:04,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 862 transitions. [2023-08-30 20:33:04,249 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.14285714285714) internal successors, (862), 7 states have internal predecessors, (862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:04,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:04,251 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:04,251 INFO L175 Difference]: Start difference. First operand has 207 places, 707 transitions, 14065 flow. Second operand 7 states and 862 transitions. [2023-08-30 20:33:04,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 780 transitions, 16675 flow [2023-08-30 20:33:04,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 780 transitions, 16170 flow, removed 53 selfloop flow, removed 4 redundant places. [2023-08-30 20:33:04,787 INFO L231 Difference]: Finished difference. Result has 212 places, 734 transitions, 14769 flow [2023-08-30 20:33:04,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=13582, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=224, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=14769, PETRI_PLACES=212, PETRI_TRANSITIONS=734} [2023-08-30 20:33:04,787 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 182 predicate places. [2023-08-30 20:33:04,788 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 734 transitions, 14769 flow [2023-08-30 20:33:04,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 115.27272727272727) internal successors, (1268), 11 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:04,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:33:04,788 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] [2023-08-30 20:33:04,793 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-08-30 20:33:04,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:04,994 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:33:04,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:33:04,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1586503365, now seen corresponding path program 5 times [2023-08-30 20:33:04,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:33:04,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356798133] [2023-08-30 20:33:04,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:33:04,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:33:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:33:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:05,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:33:05,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356798133] [2023-08-30 20:33:05,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356798133] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:33:05,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454182349] [2023-08-30 20:33:05,435 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:33:05,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:05,436 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:33:05,436 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:33:05,438 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-08-30 20:33:05,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-08-30 20:33:05,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:33:05,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 51 conjunts are in the unsatisfiable core [2023-08-30 20:33:05,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:33:05,667 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:33:05,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-08-30 20:33:05,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:05,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:33:05,821 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-08-30 20:33:05,821 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 12 [2023-08-30 20:33:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:05,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454182349] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:33:05,849 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:33:05,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 6] total 20 [2023-08-30 20:33:05,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044803432] [2023-08-30 20:33:05,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:33:05,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-08-30 20:33:05,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:33:05,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-08-30 20:33:05,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-08-30 20:33:06,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 268 [2023-08-30 20:33:06,299 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 734 transitions, 14769 flow. Second operand has 22 states, 22 states have (on average 100.54545454545455) internal successors, (2212), 22 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:06,299 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:33:06,299 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 268 [2023-08-30 20:33:06,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:33:09,578 INFO L130 PetriNetUnfolder]: 7554/11811 cut-off events. [2023-08-30 20:33:09,578 INFO L131 PetriNetUnfolder]: For 214242/214242 co-relation queries the response was YES. [2023-08-30 20:33:09,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97072 conditions, 11811 events. 7554/11811 cut-off events. For 214242/214242 co-relation queries the response was YES. Maximal size of possible extension queue 717. Compared 78140 event pairs, 490 based on Foata normal form. 2/11813 useless extension candidates. Maximal degree in co-relation 96739. Up to 7647 conditions per place. [2023-08-30 20:33:09,682 INFO L137 encePairwiseOnDemand]: 252/268 looper letters, 589 selfloop transitions, 606 changer transitions 9/1204 dead transitions. [2023-08-30 20:33:09,682 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 1204 transitions, 25267 flow [2023-08-30 20:33:09,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-08-30 20:33:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-08-30 20:33:09,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3145 transitions. [2023-08-30 20:33:09,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39116915422885573 [2023-08-30 20:33:09,685 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3145 transitions. [2023-08-30 20:33:09,685 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3145 transitions. [2023-08-30 20:33:09,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:33:09,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3145 transitions. [2023-08-30 20:33:09,688 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 104.83333333333333) internal successors, (3145), 30 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:09,693 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 268.0) internal successors, (8308), 31 states have internal predecessors, (8308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:09,694 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 268.0) internal successors, (8308), 31 states have internal predecessors, (8308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:09,694 INFO L175 Difference]: Start difference. First operand has 212 places, 734 transitions, 14769 flow. Second operand 30 states and 3145 transitions. [2023-08-30 20:33:09,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 1204 transitions, 25267 flow [2023-08-30 20:33:10,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 1204 transitions, 24720 flow, removed 162 selfloop flow, removed 1 redundant places. [2023-08-30 20:33:10,700 INFO L231 Difference]: Finished difference. Result has 249 places, 1071 transitions, 23124 flow [2023-08-30 20:33:10,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=14388, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=283, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=23124, PETRI_PLACES=249, PETRI_TRANSITIONS=1071} [2023-08-30 20:33:10,701 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 219 predicate places. [2023-08-30 20:33:10,701 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 1071 transitions, 23124 flow [2023-08-30 20:33:10,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 100.54545454545455) internal successors, (2212), 22 states have internal predecessors, (2212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:10,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:33:10,702 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] [2023-08-30 20:33:10,706 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-08-30 20:33:10,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:10,902 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:33:10,902 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:33:10,903 INFO L85 PathProgramCache]: Analyzing trace with hash -359134195, now seen corresponding path program 8 times [2023-08-30 20:33:10,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:33:10,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300993227] [2023-08-30 20:33:10,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:33:10,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:33:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:33:11,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:11,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:33:11,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300993227] [2023-08-30 20:33:11,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300993227] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:33:11,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198888217] [2023-08-30 20:33:11,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:33:11,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:11,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:33:11,165 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:33:11,196 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-08-30 20:33:11,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:33:11,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:33:11,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 20:33:11,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:33:11,374 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 [2023-08-30 20:33:11,382 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:11,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:33:11,408 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:33:11,409 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:33:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:11,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198888217] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:33:11,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:33:11,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-30 20:33:11,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67430179] [2023-08-30 20:33:11,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:33:11,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:33:11,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:33:11,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:33:11,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:33:11,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 268 [2023-08-30 20:33:11,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 1071 transitions, 23124 flow. Second operand has 11 states, 11 states have (on average 115.27272727272727) internal successors, (1268), 11 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:11,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:33:11,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 268 [2023-08-30 20:33:11,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:33:14,175 INFO L130 PetriNetUnfolder]: 7270/11442 cut-off events. [2023-08-30 20:33:14,175 INFO L131 PetriNetUnfolder]: For 265114/266720 co-relation queries the response was YES. [2023-08-30 20:33:14,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101984 conditions, 11442 events. 7270/11442 cut-off events. For 265114/266720 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 76434 event pairs, 1536 based on Foata normal form. 950/12153 useless extension candidates. Maximal degree in co-relation 101606. Up to 10597 conditions per place. [2023-08-30 20:33:14,288 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 865 selfloop transitions, 231 changer transitions 1/1122 dead transitions. [2023-08-30 20:33:14,289 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 1122 transitions, 26129 flow [2023-08-30 20:33:14,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:33:14,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:33:14,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 857 transitions. [2023-08-30 20:33:14,290 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4568230277185501 [2023-08-30 20:33:14,290 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 857 transitions. [2023-08-30 20:33:14,290 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 857 transitions. [2023-08-30 20:33:14,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:33:14,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 857 transitions. [2023-08-30 20:33:14,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.42857142857143) internal successors, (857), 7 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:14,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:14,293 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:14,293 INFO L175 Difference]: Start difference. First operand has 249 places, 1071 transitions, 23124 flow. Second operand 7 states and 857 transitions. [2023-08-30 20:33:14,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 1122 transitions, 26129 flow [2023-08-30 20:33:15,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 1122 transitions, 25541 flow, removed 276 selfloop flow, removed 3 redundant places. [2023-08-30 20:33:15,647 INFO L231 Difference]: Finished difference. Result has 254 places, 1088 transitions, 23500 flow [2023-08-30 20:33:15,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22546, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1071, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=843, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=23500, PETRI_PLACES=254, PETRI_TRANSITIONS=1088} [2023-08-30 20:33:15,648 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 224 predicate places. [2023-08-30 20:33:15,648 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 1088 transitions, 23500 flow [2023-08-30 20:33:15,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 115.27272727272727) internal successors, (1268), 11 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:15,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:33:15,649 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] [2023-08-30 20:33:15,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-08-30 20:33:15,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 20:33:15,849 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:33:15,850 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:33:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1879528285, now seen corresponding path program 9 times [2023-08-30 20:33:15,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:33:15,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743260013] [2023-08-30 20:33:15,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:33:15,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:33:15,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:33:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:16,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:33:16,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743260013] [2023-08-30 20:33:16,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743260013] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:33:16,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765601845] [2023-08-30 20:33:16,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:33:16,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:16,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:33:16,105 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:33:16,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-08-30 20:33:16,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:33:16,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:33:16,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 43 conjunts are in the unsatisfiable core [2023-08-30 20:33:16,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:33:16,326 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 [2023-08-30 20:33:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:16,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:33:16,369 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:33:16,370 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2023-08-30 20:33:16,390 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:16,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765601845] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:33:16,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:33:16,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 9 [2023-08-30 20:33:16,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765676472] [2023-08-30 20:33:16,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:33:16,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-30 20:33:16,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:33:16,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-30 20:33:16,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2023-08-30 20:33:16,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 268 [2023-08-30 20:33:16,541 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 1088 transitions, 23500 flow. Second operand has 11 states, 11 states have (on average 115.27272727272727) internal successors, (1268), 11 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:16,541 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:33:16,541 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 268 [2023-08-30 20:33:16,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:33:19,966 INFO L130 PetriNetUnfolder]: 7494/11798 cut-off events. [2023-08-30 20:33:19,966 INFO L131 PetriNetUnfolder]: For 270263/271899 co-relation queries the response was YES. [2023-08-30 20:33:20,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103991 conditions, 11798 events. 7494/11798 cut-off events. For 270263/271899 co-relation queries the response was YES. Maximal size of possible extension queue 795. Compared 79210 event pairs, 1442 based on Foata normal form. 980/12537 useless extension candidates. Maximal degree in co-relation 103616. Up to 10733 conditions per place. [2023-08-30 20:33:20,075 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 866 selfloop transitions, 247 changer transitions 1/1139 dead transitions. [2023-08-30 20:33:20,076 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 1139 transitions, 26566 flow [2023-08-30 20:33:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:33:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:33:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 858 transitions. [2023-08-30 20:33:20,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4573560767590618 [2023-08-30 20:33:20,077 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 858 transitions. [2023-08-30 20:33:20,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 858 transitions. [2023-08-30 20:33:20,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:33:20,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 858 transitions. [2023-08-30 20:33:20,078 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 122.57142857142857) internal successors, (858), 7 states have internal predecessors, (858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:20,079 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:20,079 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:20,079 INFO L175 Difference]: Start difference. First operand has 254 places, 1088 transitions, 23500 flow. Second operand 7 states and 858 transitions. [2023-08-30 20:33:20,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 1139 transitions, 26566 flow [2023-08-30 20:33:21,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 1139 transitions, 26101 flow, removed 113 selfloop flow, removed 3 redundant places. [2023-08-30 20:33:21,256 INFO L231 Difference]: Finished difference. Result has 260 places, 1110 transitions, 24245 flow [2023-08-30 20:33:21,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=23035, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1088, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=228, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=848, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=24245, PETRI_PLACES=260, PETRI_TRANSITIONS=1110} [2023-08-30 20:33:21,258 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2023-08-30 20:33:21,258 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 1110 transitions, 24245 flow [2023-08-30 20:33:21,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 115.27272727272727) internal successors, (1268), 11 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:21,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:33:21,259 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] [2023-08-30 20:33:21,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-08-30 20:33:21,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 20:33:21,464 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:33:21,465 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:33:21,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2067072005, now seen corresponding path program 6 times [2023-08-30 20:33:21,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:33:21,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287740204] [2023-08-30 20:33:21,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:33:21,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:33:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:33:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:21,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:33:21,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287740204] [2023-08-30 20:33:21,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287740204] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:33:21,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704218842] [2023-08-30 20:33:21,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:33:21,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:21,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:33:21,957 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:33:21,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-08-30 20:33:22,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:33:22,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:33:22,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 20:33:22,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:33:22,337 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 [2023-08-30 20:33:22,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:22,345 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:33:22,384 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:33:22,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 16 [2023-08-30 20:33:22,595 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:22,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704218842] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:33:22,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:33:22,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 21 [2023-08-30 20:33:22,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727709899] [2023-08-30 20:33:22,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:33:22,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 20:33:22,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:33:22,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 20:33:22,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2023-08-30 20:33:23,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 268 [2023-08-30 20:33:23,368 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 1110 transitions, 24245 flow. Second operand has 23 states, 23 states have (on average 98.34782608695652) internal successors, (2262), 23 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:23,368 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:33:23,368 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 268 [2023-08-30 20:33:23,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:33:29,569 INFO L130 PetriNetUnfolder]: 9250/14404 cut-off events. [2023-08-30 20:33:29,569 INFO L131 PetriNetUnfolder]: For 293354/293354 co-relation queries the response was YES. [2023-08-30 20:33:29,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125651 conditions, 14404 events. 9250/14404 cut-off events. For 293354/293354 co-relation queries the response was YES. Maximal size of possible extension queue 846. Compared 96317 event pairs, 920 based on Foata normal form. 10/14414 useless extension candidates. Maximal degree in co-relation 125272. Up to 10010 conditions per place. [2023-08-30 20:33:29,722 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 793 selfloop transitions, 749 changer transitions 30/1572 dead transitions. [2023-08-30 20:33:29,722 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1572 transitions, 34049 flow [2023-08-30 20:33:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-08-30 20:33:29,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2023-08-30 20:33:29,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 5774 transitions. [2023-08-30 20:33:29,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.384728144989339 [2023-08-30 20:33:29,739 INFO L72 ComplementDD]: Start complementDD. Operand 56 states and 5774 transitions. [2023-08-30 20:33:29,739 INFO L73 IsDeterministic]: Start isDeterministic. Operand 56 states and 5774 transitions. [2023-08-30 20:33:29,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:33:29,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 56 states and 5774 transitions. [2023-08-30 20:33:29,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 57 states, 56 states have (on average 103.10714285714286) internal successors, (5774), 56 states have internal predecessors, (5774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:29,761 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 57 states, 57 states have (on average 268.0) internal successors, (15276), 57 states have internal predecessors, (15276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:29,761 INFO L81 ComplementDD]: Finished complementDD. Result has 57 states, 57 states have (on average 268.0) internal successors, (15276), 57 states have internal predecessors, (15276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:29,762 INFO L175 Difference]: Start difference. First operand has 260 places, 1110 transitions, 24245 flow. Second operand 56 states and 5774 transitions. [2023-08-30 20:33:29,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1572 transitions, 34049 flow [2023-08-30 20:33:31,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 1572 transitions, 33230 flow, removed 295 selfloop flow, removed 2 redundant places. [2023-08-30 20:33:31,688 INFO L231 Difference]: Finished difference. Result has 334 places, 1348 transitions, 30436 flow [2023-08-30 20:33:31,689 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=23718, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=545, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=56, PETRI_FLOW=30436, PETRI_PLACES=334, PETRI_TRANSITIONS=1348} [2023-08-30 20:33:31,690 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 304 predicate places. [2023-08-30 20:33:31,690 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 1348 transitions, 30436 flow [2023-08-30 20:33:31,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 98.34782608695652) internal successors, (2262), 23 states have internal predecessors, (2262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:31,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:33:31,691 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] [2023-08-30 20:33:31,696 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-08-30 20:33:31,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 20:33:31,896 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:33:31,896 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:33:31,897 INFO L85 PathProgramCache]: Analyzing trace with hash -337765073, now seen corresponding path program 7 times [2023-08-30 20:33:31,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:33:31,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552410457] [2023-08-30 20:33:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:33:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:33:31,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:33:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:32,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:33:32,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552410457] [2023-08-30 20:33:32,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552410457] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:33:32,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670663621] [2023-08-30 20:33:32,335 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:33:32,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:32,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:33:32,336 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:33:32,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-08-30 20:33:32,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:33:32,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 52 conjunts are in the unsatisfiable core [2023-08-30 20:33:32,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:33:32,629 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 [2023-08-30 20:33:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:32,636 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:33:32,672 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:33:32,672 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2023-08-30 20:33:32,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:32,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670663621] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:33:32,784 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:33:32,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 22 [2023-08-30 20:33:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943471222] [2023-08-30 20:33:32,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:33:32,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:33:32,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:33:32,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:33:32,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:33:33,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 268 [2023-08-30 20:33:33,401 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 1348 transitions, 30436 flow. Second operand has 24 states, 24 states have (on average 101.25) internal successors, (2430), 24 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:33,401 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:33:33,401 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 268 [2023-08-30 20:33:33,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:33:38,099 INFO L130 PetriNetUnfolder]: 9328/14527 cut-off events. [2023-08-30 20:33:38,099 INFO L131 PetriNetUnfolder]: For 352572/352572 co-relation queries the response was YES. [2023-08-30 20:33:38,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135011 conditions, 14527 events. 9328/14527 cut-off events. For 352572/352572 co-relation queries the response was YES. Maximal size of possible extension queue 853. Compared 96782 event pairs, 1855 based on Foata normal form. 1/14528 useless extension candidates. Maximal degree in co-relation 134610. Up to 13019 conditions per place. [2023-08-30 20:33:38,274 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 1010 selfloop transitions, 411 changer transitions 3/1424 dead transitions. [2023-08-30 20:33:38,274 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 1424 transitions, 34381 flow [2023-08-30 20:33:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 20:33:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 20:33:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1605 transitions. [2023-08-30 20:33:38,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39925373134328357 [2023-08-30 20:33:38,277 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1605 transitions. [2023-08-30 20:33:38,277 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1605 transitions. [2023-08-30 20:33:38,278 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:33:38,278 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1605 transitions. [2023-08-30 20:33:38,280 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 107.0) internal successors, (1605), 15 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:38,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:38,283 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:38,283 INFO L175 Difference]: Start difference. First operand has 334 places, 1348 transitions, 30436 flow. Second operand 15 states and 1605 transitions. [2023-08-30 20:33:38,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 1424 transitions, 34381 flow [2023-08-30 20:33:40,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 1424 transitions, 31914 flow, removed 1028 selfloop flow, removed 12 redundant places. [2023-08-30 20:33:40,828 INFO L231 Difference]: Finished difference. Result has 338 places, 1356 transitions, 29128 flow [2023-08-30 20:33:40,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=28054, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=937, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=29128, PETRI_PLACES=338, PETRI_TRANSITIONS=1356} [2023-08-30 20:33:40,830 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 308 predicate places. [2023-08-30 20:33:40,830 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 1356 transitions, 29128 flow [2023-08-30 20:33:40,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 101.25) internal successors, (2430), 24 states have internal predecessors, (2430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:40,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:33:40,831 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] [2023-08-30 20:33:40,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-08-30 20:33:41,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:41,031 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:33:41,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:33:41,032 INFO L85 PathProgramCache]: Analyzing trace with hash -913711123, now seen corresponding path program 8 times [2023-08-30 20:33:41,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:33:41,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616623108] [2023-08-30 20:33:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:33:41,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:33:41,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:33:41,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:41,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:33:41,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616623108] [2023-08-30 20:33:41,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616623108] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:33:41,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772739456] [2023-08-30 20:33:41,709 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:33:41,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:41,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:33:41,710 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:33:41,711 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-08-30 20:33:41,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:33:41,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:33:41,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 54 conjunts are in the unsatisfiable core [2023-08-30 20:33:41,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:33:42,045 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 [2023-08-30 20:33:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:42,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:33:42,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:33:42,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 16 [2023-08-30 20:33:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:42,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1772739456] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:33:42,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:33:42,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 22 [2023-08-30 20:33:42,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368522714] [2023-08-30 20:33:42,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:33:42,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:33:42,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:33:42,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:33:42,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:33:43,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 268 [2023-08-30 20:33:43,416 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1356 transitions, 29128 flow. Second operand has 24 states, 24 states have (on average 95.125) internal successors, (2283), 24 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:43,416 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:33:43,416 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 268 [2023-08-30 20:33:43,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:33:48,975 INFO L130 PetriNetUnfolder]: 9257/14637 cut-off events. [2023-08-30 20:33:48,975 INFO L131 PetriNetUnfolder]: For 316820/317331 co-relation queries the response was YES. [2023-08-30 20:33:49,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131104 conditions, 14637 events. 9257/14637 cut-off events. For 316820/317331 co-relation queries the response was YES. Maximal size of possible extension queue 911. Compared 101574 event pairs, 1122 based on Foata normal form. 259/14851 useless extension candidates. Maximal degree in co-relation 130739. Up to 10652 conditions per place. [2023-08-30 20:33:49,158 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 839 selfloop transitions, 634 changer transitions 7/1517 dead transitions. [2023-08-30 20:33:49,158 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1517 transitions, 34116 flow [2023-08-30 20:33:49,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:33:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:33:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1932 transitions. [2023-08-30 20:33:49,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37941869599371564 [2023-08-30 20:33:49,160 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1932 transitions. [2023-08-30 20:33:49,160 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1932 transitions. [2023-08-30 20:33:49,161 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:33:49,161 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1932 transitions. [2023-08-30 20:33:49,163 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 101.6842105263158) internal successors, (1932), 19 states have internal predecessors, (1932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:49,166 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:49,166 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:49,166 INFO L175 Difference]: Start difference. First operand has 338 places, 1356 transitions, 29128 flow. Second operand 19 states and 1932 transitions. [2023-08-30 20:33:49,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1517 transitions, 34116 flow [2023-08-30 20:33:51,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 1517 transitions, 33203 flow, removed 62 selfloop flow, removed 12 redundant places. [2023-08-30 20:33:51,168 INFO L231 Difference]: Finished difference. Result has 350 places, 1426 transitions, 30894 flow [2023-08-30 20:33:51,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=28225, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=570, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=766, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=30894, PETRI_PLACES=350, PETRI_TRANSITIONS=1426} [2023-08-30 20:33:51,170 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 320 predicate places. [2023-08-30 20:33:51,170 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 1426 transitions, 30894 flow [2023-08-30 20:33:51,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 95.125) internal successors, (2283), 24 states have internal predecessors, (2283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:51,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:33:51,171 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] [2023-08-30 20:33:51,177 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-08-30 20:33:51,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-08-30 20:33:51,373 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:33:51,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:33:51,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2022424109, now seen corresponding path program 10 times [2023-08-30 20:33:51,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:33:51,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151909128] [2023-08-30 20:33:51,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:33:51,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:33:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:33:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:33:51,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:33:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151909128] [2023-08-30 20:33:51,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151909128] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:33:51,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088934379] [2023-08-30 20:33:51,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:33:51,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:33:51,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:33:51,689 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:33:51,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-08-30 20:33:51,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:33:51,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:33:51,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 20:33:51,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:33:51,865 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 [2023-08-30 20:33:51,898 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 [2023-08-30 20:33:51,932 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 [2023-08-30 20:33:52,023 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:33:52,024 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 [2023-08-30 20:33:52,048 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 [2023-08-30 20:33:52,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:33:52,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:33:52,101 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int))) (= (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1208) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))) (+ (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0))) is different from false [2023-08-30 20:33:52,104 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1208 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1208) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))))) is different from false [2023-08-30 20:33:52,176 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:33:52,176 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 54 treesize of output 43 [2023-08-30 20:33:52,179 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 5142 treesize of output 4822 [2023-08-30 20:33:52,189 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 124 treesize of output 116 [2023-08-30 20:33:52,192 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 57 treesize of output 55 [2023-08-30 20:33:52,195 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 58 treesize of output 54 [2023-08-30 20:33:52,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 20:33:52,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088934379] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:33:52,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:33:52,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2023-08-30 20:33:52,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645501133] [2023-08-30 20:33:52,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:33:52,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:33:52,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:33:52,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:33:52,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=348, Unknown=20, NotChecked=82, Total=552 [2023-08-30 20:33:52,284 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-08-30 20:33:52,285 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1426 transitions, 30894 flow. Second operand has 24 states, 24 states have (on average 85.875) internal successors, (2061), 24 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:52,285 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:33:52,285 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-08-30 20:33:52,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:33:52,606 WARN L839 $PredicateComparison]: unable to prove that (and (= c_~res2~0 c_~res1~0) (forall ((v_ArrVal_1208 (Array Int Int)) (v_ArrVal_1207 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1207))) (= (+ c_~res1~0 (select (select .cse0 c_~A~0.base) c_~A~0.offset)) (+ c_~res2~0 (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1208) c_~A~0.base) c_~A~0.offset))))) (forall ((v_ArrVal_1208 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1208) c_~A~0.base) c_~A~0.offset) c_~res2~0)))) is different from false [2023-08-30 20:33:57,196 INFO L130 PetriNetUnfolder]: 9679/15171 cut-off events. [2023-08-30 20:33:57,196 INFO L131 PetriNetUnfolder]: For 432930/434921 co-relation queries the response was YES. [2023-08-30 20:33:57,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142228 conditions, 15171 events. 9679/15171 cut-off events. For 432930/434921 co-relation queries the response was YES. Maximal size of possible extension queue 976. Compared 104595 event pairs, 1981 based on Foata normal form. 1095/15951 useless extension candidates. Maximal degree in co-relation 141846. Up to 13207 conditions per place. [2023-08-30 20:33:57,370 INFO L137 encePairwiseOnDemand]: 252/268 looper letters, 1108 selfloop transitions, 435 changer transitions 1/1570 dead transitions. [2023-08-30 20:33:57,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 1570 transitions, 37111 flow [2023-08-30 20:33:57,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:33:57,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:33:57,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 938 transitions. [2023-08-30 20:33:57,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2023-08-30 20:33:57,372 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 938 transitions. [2023-08-30 20:33:57,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 938 transitions. [2023-08-30 20:33:57,373 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:33:57,373 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 938 transitions. [2023-08-30 20:33:57,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.8) internal successors, (938), 10 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:57,375 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:57,376 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:57,376 INFO L175 Difference]: Start difference. First operand has 350 places, 1426 transitions, 30894 flow. Second operand 10 states and 938 transitions. [2023-08-30 20:33:57,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 1570 transitions, 37111 flow [2023-08-30 20:33:59,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 353 places, 1570 transitions, 36462 flow, removed 181 selfloop flow, removed 6 redundant places. [2023-08-30 20:33:59,976 INFO L231 Difference]: Finished difference. Result has 357 places, 1521 transitions, 34047 flow [2023-08-30 20:33:59,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=30299, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1426, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=346, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1044, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=34047, PETRI_PLACES=357, PETRI_TRANSITIONS=1521} [2023-08-30 20:33:59,977 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 327 predicate places. [2023-08-30 20:33:59,978 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 1521 transitions, 34047 flow [2023-08-30 20:33:59,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 85.875) internal successors, (2061), 24 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:33:59,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:33:59,978 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] [2023-08-30 20:33:59,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-08-30 20:34:00,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-08-30 20:34:00,184 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:34:00,184 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:34:00,184 INFO L85 PathProgramCache]: Analyzing trace with hash 789791239, now seen corresponding path program 11 times [2023-08-30 20:34:00,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:34:00,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221201514] [2023-08-30 20:34:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:34:00,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:34:00,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:34:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:34:00,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:34:00,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221201514] [2023-08-30 20:34:00,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221201514] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:34:00,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345373491] [2023-08-30 20:34:00,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:34:00,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:00,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:34:00,549 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:34:00,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-08-30 20:34:00,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:34:00,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:34:00,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 46 conjunts are in the unsatisfiable core [2023-08-30 20:34:00,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:34:00,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:34:00,817 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 [2023-08-30 20:34:00,837 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 [2023-08-30 20:34:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:34:00,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:34:00,875 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1253 (Array Int Int))) (= c_~res1~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1253) c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset)) c_~res2~0))) is different from false [2023-08-30 20:34:00,882 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:34:00,882 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 38 [2023-08-30 20:34:00,885 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 17 treesize of output 11 [2023-08-30 20:34:00,955 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:34:00,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345373491] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:34:00,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:34:00,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2023-08-30 20:34:00,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975309001] [2023-08-30 20:34:00,955 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:34:00,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-08-30 20:34:00,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:34:00,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-08-30 20:34:00,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=302, Unknown=1, NotChecked=36, Total=420 [2023-08-30 20:34:00,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-08-30 20:34:00,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 1521 transitions, 34047 flow. Second operand has 21 states, 21 states have (on average 97.0952380952381) internal successors, (2039), 21 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:00,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:34:00,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-08-30 20:34:00,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:34:06,408 INFO L130 PetriNetUnfolder]: 9918/15535 cut-off events. [2023-08-30 20:34:06,408 INFO L131 PetriNetUnfolder]: For 475071/477352 co-relation queries the response was YES. [2023-08-30 20:34:06,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154366 conditions, 15535 events. 9918/15535 cut-off events. For 475071/477352 co-relation queries the response was YES. Maximal size of possible extension queue 999. Compared 107329 event pairs, 2021 based on Foata normal form. 1137/16372 useless extension candidates. Maximal degree in co-relation 153964. Up to 13162 conditions per place. [2023-08-30 20:34:06,618 INFO L137 encePairwiseOnDemand]: 255/268 looper letters, 1125 selfloop transitions, 479 changer transitions 1/1631 dead transitions. [2023-08-30 20:34:06,618 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 1631 transitions, 39569 flow [2023-08-30 20:34:06,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:34:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:34:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 847 transitions. [2023-08-30 20:34:06,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39505597014925375 [2023-08-30 20:34:06,619 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 847 transitions. [2023-08-30 20:34:06,619 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 847 transitions. [2023-08-30 20:34:06,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:34:06,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 847 transitions. [2023-08-30 20:34:06,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 105.875) internal successors, (847), 8 states have internal predecessors, (847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:06,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:06,622 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:06,622 INFO L175 Difference]: Start difference. First operand has 357 places, 1521 transitions, 34047 flow. Second operand 8 states and 847 transitions. [2023-08-30 20:34:06,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 1631 transitions, 39569 flow [2023-08-30 20:34:09,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 1631 transitions, 38828 flow, removed 218 selfloop flow, removed 4 redundant places. [2023-08-30 20:34:09,437 INFO L231 Difference]: Finished difference. Result has 362 places, 1582 transitions, 36122 flow [2023-08-30 20:34:09,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=33306, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=418, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1081, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=36122, PETRI_PLACES=362, PETRI_TRANSITIONS=1582} [2023-08-30 20:34:09,438 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 332 predicate places. [2023-08-30 20:34:09,438 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 1582 transitions, 36122 flow [2023-08-30 20:34:09,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.0952380952381) internal successors, (2039), 21 states have internal predecessors, (2039), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:09,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:34:09,438 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] [2023-08-30 20:34:09,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-08-30 20:34:09,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:09,639 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:34:09,639 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:34:09,639 INFO L85 PathProgramCache]: Analyzing trace with hash 526205281, now seen corresponding path program 12 times [2023-08-30 20:34:09,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:34:09,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857738179] [2023-08-30 20:34:09,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:34:09,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:34:09,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:34:09,951 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:34:09,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:34:09,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857738179] [2023-08-30 20:34:09,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857738179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:34:09,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158578720] [2023-08-30 20:34:09,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:34:09,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:09,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:34:09,953 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:34:09,955 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-08-30 20:34:10,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:34:10,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:34:10,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 48 conjunts are in the unsatisfiable core [2023-08-30 20:34:10,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:34:10,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:34:10,198 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 [2023-08-30 20:34:10,234 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 [2023-08-30 20:34:10,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:34:10,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:34:10,271 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1298 (Array Int Int))) (= c_~res2~0 (+ c_~res1~0 (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1298) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset))))) is different from false [2023-08-30 20:34:10,292 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:34:10,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 34 [2023-08-30 20:34:10,295 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 13 treesize of output 11 [2023-08-30 20:34:10,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 1 not checked. [2023-08-30 20:34:10,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158578720] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:34:10,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:34:10,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 20:34:10,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188695680] [2023-08-30 20:34:10,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:34:10,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:34:10,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:34:10,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:34:10,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=271, Unknown=1, NotChecked=34, Total=380 [2023-08-30 20:34:10,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-08-30 20:34:10,376 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 1582 transitions, 36122 flow. Second operand has 20 states, 20 states have (on average 97.4) internal successors, (1948), 20 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:10,376 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:34:10,377 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-08-30 20:34:10,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:34:15,958 INFO L130 PetriNetUnfolder]: 10122/15850 cut-off events. [2023-08-30 20:34:15,958 INFO L131 PetriNetUnfolder]: For 507863/510185 co-relation queries the response was YES. [2023-08-30 20:34:16,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 161938 conditions, 15850 events. 10122/15850 cut-off events. For 507863/510185 co-relation queries the response was YES. Maximal size of possible extension queue 1019. Compared 109973 event pairs, 1744 based on Foata normal form. 1155/16685 useless extension candidates. Maximal degree in co-relation 161522. Up to 14064 conditions per place. [2023-08-30 20:34:16,146 INFO L137 encePairwiseOnDemand]: 261/268 looper letters, 1199 selfloop transitions, 409 changer transitions 1/1635 dead transitions. [2023-08-30 20:34:16,146 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 1635 transitions, 40329 flow [2023-08-30 20:34:16,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:34:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:34:16,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 739 transitions. [2023-08-30 20:34:16,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39392324093816633 [2023-08-30 20:34:16,147 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 739 transitions. [2023-08-30 20:34:16,148 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 739 transitions. [2023-08-30 20:34:16,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:34:16,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 739 transitions. [2023-08-30 20:34:16,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.57142857142857) internal successors, (739), 7 states have internal predecessors, (739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:16,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:16,149 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:16,149 INFO L175 Difference]: Start difference. First operand has 362 places, 1582 transitions, 36122 flow. Second operand 7 states and 739 transitions. [2023-08-30 20:34:16,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 1635 transitions, 40329 flow [2023-08-30 20:34:18,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 1635 transitions, 39247 flow, removed 128 selfloop flow, removed 5 redundant places. [2023-08-30 20:34:18,696 INFO L231 Difference]: Finished difference. Result has 365 places, 1604 transitions, 36653 flow [2023-08-30 20:34:18,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=35050, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=387, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=36653, PETRI_PLACES=365, PETRI_TRANSITIONS=1604} [2023-08-30 20:34:18,697 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 335 predicate places. [2023-08-30 20:34:18,698 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 1604 transitions, 36653 flow [2023-08-30 20:34:18,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.4) internal successors, (1948), 20 states have internal predecessors, (1948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:18,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:34:18,698 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] [2023-08-30 20:34:18,704 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2023-08-30 20:34:18,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:18,901 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:34:18,901 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:34:18,901 INFO L85 PathProgramCache]: Analyzing trace with hash 534117035, now seen corresponding path program 13 times [2023-08-30 20:34:18,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:34:18,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055019916] [2023-08-30 20:34:18,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:34:18,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:34:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:34:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:34:19,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:34:19,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055019916] [2023-08-30 20:34:19,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055019916] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:34:19,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300410035] [2023-08-30 20:34:19,183 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:34:19,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:19,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:34:19,187 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:34:19,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-08-30 20:34:19,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:34:19,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 20:34:19,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:34:19,332 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 [2023-08-30 20:34:19,360 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 [2023-08-30 20:34:19,386 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 [2023-08-30 20:34:19,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:34:19,478 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 [2023-08-30 20:34:19,483 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 [2023-08-30 20:34:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:34:19,493 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:34:19,516 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1347 (Array Int Int))) (= c_~res2~0 (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1347) c_~A~0.base) (+ (* |c_thread1Thread1of1ForFork1_~i~0#1| 4) c_~A~0.offset)) c_~res1~0))) is different from false [2023-08-30 20:34:19,537 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1347 (Array Int Int))) (= (+ c_~res2~0 (select (select |c_#memory_int| c_~A~0.base) (+ (* |c_thread2Thread1of1ForFork2_~i~1#1| 4) c_~A~0.offset))) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1347) c_~A~0.base) c_~A~0.offset) c_~res1~0))) is different from false [2023-08-30 20:34:19,558 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1347 (Array Int Int)) (v_ArrVal_1346 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1346))) (= (+ (select (select .cse0 c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ (select (select (store .cse0 |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1347) c_~A~0.base) c_~A~0.offset) c_~res1~0)))) is different from false [2023-08-30 20:34:19,591 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:34:19,591 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 54 treesize of output 43 [2023-08-30 20:34:19,595 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 1278 treesize of output 1198 [2023-08-30 20:34:19,602 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 124 treesize of output 116 [2023-08-30 20:34:19,604 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 116 treesize of output 112 [2023-08-30 20:34:19,611 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 56 treesize of output 54 [2023-08-30 20:34:19,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 20:34:19,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300410035] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:34:19,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:34:19,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 22 [2023-08-30 20:34:19,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119986776] [2023-08-30 20:34:19,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:34:19,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:34:19,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:34:19,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:34:19,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=324, Unknown=13, NotChecked=120, Total=552 [2023-08-30 20:34:19,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-08-30 20:34:19,664 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 1604 transitions, 36653 flow. Second operand has 24 states, 24 states have (on average 85.875) internal successors, (2061), 24 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:19,664 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:34:19,664 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-08-30 20:34:19,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:34:20,078 WARN L839 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_1347 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res2~0) (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1347) c_~A~0.base) c_~A~0.offset) c_~res1~0))) (= c_~res2~0 c_~res1~0)) is different from false [2023-08-30 20:34:25,882 INFO L130 PetriNetUnfolder]: 10543/16511 cut-off events. [2023-08-30 20:34:25,882 INFO L131 PetriNetUnfolder]: For 531355/533788 co-relation queries the response was YES. [2023-08-30 20:34:26,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168432 conditions, 16511 events. 10543/16511 cut-off events. For 531355/533788 co-relation queries the response was YES. Maximal size of possible extension queue 1059. Compared 115194 event pairs, 2053 based on Foata normal form. 1203/17364 useless extension candidates. Maximal degree in co-relation 168014. Up to 15043 conditions per place. [2023-08-30 20:34:26,110 INFO L137 encePairwiseOnDemand]: 254/268 looper letters, 1290 selfloop transitions, 405 changer transitions 1/1722 dead transitions. [2023-08-30 20:34:26,111 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 1722 transitions, 42521 flow [2023-08-30 20:34:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-08-30 20:34:26,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-08-30 20:34:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 932 transitions. [2023-08-30 20:34:26,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34776119402985073 [2023-08-30 20:34:26,112 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 932 transitions. [2023-08-30 20:34:26,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 932 transitions. [2023-08-30 20:34:26,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:34:26,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 932 transitions. [2023-08-30 20:34:26,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 93.2) internal successors, (932), 10 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:26,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:26,115 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 268.0) internal successors, (2948), 11 states have internal predecessors, (2948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:26,115 INFO L175 Difference]: Start difference. First operand has 365 places, 1604 transitions, 36653 flow. Second operand 10 states and 932 transitions. [2023-08-30 20:34:26,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 1722 transitions, 42521 flow [2023-08-30 20:34:28,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 1722 transitions, 41688 flow, removed 125 selfloop flow, removed 3 redundant places. [2023-08-30 20:34:28,925 INFO L231 Difference]: Finished difference. Result has 375 places, 1683 transitions, 38861 flow [2023-08-30 20:34:28,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=35843, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=335, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=38861, PETRI_PLACES=375, PETRI_TRANSITIONS=1683} [2023-08-30 20:34:28,926 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 345 predicate places. [2023-08-30 20:34:28,926 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 1683 transitions, 38861 flow [2023-08-30 20:34:28,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 85.875) internal successors, (2061), 24 states have internal predecessors, (2061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:28,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:34:28,927 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] [2023-08-30 20:34:28,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2023-08-30 20:34:29,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:29,127 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:34:29,127 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:34:29,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1502878969, now seen corresponding path program 14 times [2023-08-30 20:34:29,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:34:29,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718875666] [2023-08-30 20:34:29,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:34:29,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:34:29,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:34:29,415 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:34:29,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:34:29,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718875666] [2023-08-30 20:34:29,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718875666] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:34:29,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099742916] [2023-08-30 20:34:29,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:34:29,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:29,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:34:29,417 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:34:29,418 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-08-30 20:34:29,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:34:29,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:34:29,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 50 conjunts are in the unsatisfiable core [2023-08-30 20:34:29,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:34:29,649 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:34:29,650 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 [2023-08-30 20:34:29,657 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 [2023-08-30 20:34:29,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:34:29,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:34:29,708 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:34:29,708 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 38 [2023-08-30 20:34:29,710 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 17 treesize of output 11 [2023-08-30 20:34:29,776 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:34:29,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099742916] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:34:29,777 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:34:29,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 18 [2023-08-30 20:34:29,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037325164] [2023-08-30 20:34:29,777 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:34:29,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:34:29,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:34:29,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:34:29,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=292, Unknown=2, NotChecked=0, Total=380 [2023-08-30 20:34:29,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-08-30 20:34:29,959 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 1683 transitions, 38861 flow. Second operand has 20 states, 20 states have (on average 97.15) internal successors, (1943), 20 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:29,959 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:34:29,959 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-08-30 20:34:29,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:34:36,296 INFO L130 PetriNetUnfolder]: 10595/16614 cut-off events. [2023-08-30 20:34:36,297 INFO L131 PetriNetUnfolder]: For 566522/569244 co-relation queries the response was YES. [2023-08-30 20:34:36,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175635 conditions, 16614 events. 10595/16614 cut-off events. For 566522/569244 co-relation queries the response was YES. Maximal size of possible extension queue 1066. Compared 116340 event pairs, 2063 based on Foata normal form. 1223/17489 useless extension candidates. Maximal degree in co-relation 175200. Up to 14892 conditions per place. [2023-08-30 20:34:36,542 INFO L137 encePairwiseOnDemand]: 261/268 looper letters, 1316 selfloop transitions, 384 changer transitions 1/1727 dead transitions. [2023-08-30 20:34:36,542 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 1727 transitions, 43133 flow [2023-08-30 20:34:36,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:34:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:34:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 738 transitions. [2023-08-30 20:34:36,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39339019189765456 [2023-08-30 20:34:36,544 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 738 transitions. [2023-08-30 20:34:36,544 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 738 transitions. [2023-08-30 20:34:36,544 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:34:36,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 738 transitions. [2023-08-30 20:34:36,545 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 105.42857142857143) internal successors, (738), 7 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:36,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:36,547 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:36,547 INFO L175 Difference]: Start difference. First operand has 375 places, 1683 transitions, 38861 flow. Second operand 7 states and 738 transitions. [2023-08-30 20:34:36,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 1727 transitions, 43133 flow [2023-08-30 20:34:39,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 1727 transitions, 42310 flow, removed 245 selfloop flow, removed 4 redundant places. [2023-08-30 20:34:39,630 INFO L231 Difference]: Finished difference. Result has 378 places, 1687 transitions, 39073 flow [2023-08-30 20:34:39,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=38038, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=380, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=39073, PETRI_PLACES=378, PETRI_TRANSITIONS=1687} [2023-08-30 20:34:39,631 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 348 predicate places. [2023-08-30 20:34:39,631 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 1687 transitions, 39073 flow [2023-08-30 20:34:39,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 97.15) internal successors, (1943), 20 states have internal predecessors, (1943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:39,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:34:39,631 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] [2023-08-30 20:34:39,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-08-30 20:34:39,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:39,832 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:34:39,832 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:34:39,832 INFO L85 PathProgramCache]: Analyzing trace with hash -905212395, now seen corresponding path program 15 times [2023-08-30 20:34:39,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:34:39,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1355450449] [2023-08-30 20:34:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:34:39,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:34:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:34:40,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:34:40,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:34:40,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1355450449] [2023-08-30 20:34:40,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1355450449] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:34:40,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578552992] [2023-08-30 20:34:40,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:34:40,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:40,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:34:40,209 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:34:40,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-08-30 20:34:40,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:34:40,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:34:40,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 20:34:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:34:40,398 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 [2023-08-30 20:34:40,431 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 [2023-08-30 20:34:40,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:34:40,523 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 [2023-08-30 20:34:40,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:34:40,553 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 [2023-08-30 20:34:40,570 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 [2023-08-30 20:34:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:34:40,580 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:34:40,612 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1441 (Array Int Int))) (= (+ (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1441) c_~A~0.base) c_~A~0.offset) c_~res2~0) c_~res1~0)) is different from false [2023-08-30 20:34:44,670 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1441 (Array Int Int)) (v_ArrVal_1440 (Array Int Int))) (= (+ (select (select |c_#memory_int| c_~A~0.base) c_~A~0.offset) c_~res1~0) (+ c_~res2~0 (select (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1440) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1441) c_~A~0.base) c_~A~0.offset)))) is different from false [2023-08-30 20:34:44,681 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1439 (Array Int Int)) (v_ArrVal_1441 (Array Int Int)) (v_ArrVal_1440 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_1439))) (= (+ (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res1~0) (+ (select (select (store (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_1440) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_1441) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) c_~res2~0)))) is different from false [2023-08-30 20:34:44,688 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:34:44,688 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 51 treesize of output 40 [2023-08-30 20:34:44,691 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 326 treesize of output 294 [2023-08-30 20:34:44,699 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 70 treesize of output 64 [2023-08-30 20:34:44,702 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 130 treesize of output 126 [2023-08-30 20:34:44,704 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 126 treesize of output 118 [2023-08-30 20:34:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2023-08-30 20:34:44,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578552992] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:34:44,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:34:44,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 21 [2023-08-30 20:34:44,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545440165] [2023-08-30 20:34:44,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:34:44,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-08-30 20:34:44,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:34:44,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-08-30 20:34:44,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=307, Unknown=7, NotChecked=114, Total=506 [2023-08-30 20:34:44,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 268 [2023-08-30 20:34:44,750 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 1687 transitions, 39073 flow. Second operand has 23 states, 23 states have (on average 85.8695652173913) internal successors, (1975), 23 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:44,751 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:34:44,751 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 268 [2023-08-30 20:34:44,751 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:34:51,269 INFO L130 PetriNetUnfolder]: 11062/17360 cut-off events. [2023-08-30 20:34:51,269 INFO L131 PetriNetUnfolder]: For 596692/599524 co-relation queries the response was YES. [2023-08-30 20:34:51,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 184391 conditions, 17360 events. 11062/17360 cut-off events. For 596692/599524 co-relation queries the response was YES. Maximal size of possible extension queue 1109. Compared 122546 event pairs, 1684 based on Foata normal form. 1215/18238 useless extension candidates. Maximal degree in co-relation 183947. Up to 12772 conditions per place. [2023-08-30 20:34:51,601 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 989 selfloop transitions, 773 changer transitions 1/1789 dead transitions. [2023-08-30 20:34:51,601 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 1789 transitions, 44800 flow [2023-08-30 20:34:51,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:34:51,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:34:51,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 762 transitions. [2023-08-30 20:34:51,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.355410447761194 [2023-08-30 20:34:51,603 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 762 transitions. [2023-08-30 20:34:51,603 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 762 transitions. [2023-08-30 20:34:51,603 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:34:51,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 762 transitions. [2023-08-30 20:34:51,604 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 95.25) internal successors, (762), 8 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:51,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:51,606 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:51,606 INFO L175 Difference]: Start difference. First operand has 378 places, 1687 transitions, 39073 flow. Second operand 8 states and 762 transitions. [2023-08-30 20:34:51,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 1789 transitions, 44800 flow [2023-08-30 20:34:54,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 1789 transitions, 43993 flow, removed 55 selfloop flow, removed 5 redundant places. [2023-08-30 20:34:54,765 INFO L231 Difference]: Finished difference. Result has 383 places, 1726 transitions, 41766 flow [2023-08-30 20:34:54,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=38266, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1687, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=738, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=920, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=41766, PETRI_PLACES=383, PETRI_TRANSITIONS=1726} [2023-08-30 20:34:54,767 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 353 predicate places. [2023-08-30 20:34:54,767 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 1726 transitions, 41766 flow [2023-08-30 20:34:54,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 85.8695652173913) internal successors, (1975), 23 states have internal predecessors, (1975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:34:54,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:34:54,767 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] [2023-08-30 20:34:54,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-08-30 20:34:54,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2023-08-30 20:34:54,968 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:34:54,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:34:54,968 INFO L85 PathProgramCache]: Analyzing trace with hash -416833519, now seen corresponding path program 9 times [2023-08-30 20:34:54,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:34:54,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621197894] [2023-08-30 20:34:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:34:54,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:34:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:34:55,396 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:34:55,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:34:55,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621197894] [2023-08-30 20:34:55,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621197894] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:34:55,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605395317] [2023-08-30 20:34:55,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:34:55,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:34:55,397 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:34:55,397 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:34:55,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-08-30 20:34:55,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:34:55,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:34:55,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 58 conjunts are in the unsatisfiable core [2023-08-30 20:34:55,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:34:55,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:34:55,673 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 [2023-08-30 20:34:55,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:34:55,707 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 [2023-08-30 20:34:55,818 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:34:55,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 15 [2023-08-30 20:34:55,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:34:55,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:34:56,114 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:34:56,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 242 treesize of output 170 [2023-08-30 20:34:56,120 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 35 treesize of output 29 [2023-08-30 20:34:56,124 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 40 treesize of output 28 [2023-08-30 20:34:56,354 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:34:56,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605395317] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:34:56,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:34:56,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 30 [2023-08-30 20:34:56,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565686692] [2023-08-30 20:34:56,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:34:56,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:34:56,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:34:56,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:34:56,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=861, Unknown=3, NotChecked=0, Total=992 [2023-08-30 20:34:58,458 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:35:00,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:35:03,256 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:35:05,365 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:35:05,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 268 [2023-08-30 20:35:05,450 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1726 transitions, 41766 flow. Second operand has 32 states, 32 states have (on average 73.78125) internal successors, (2361), 32 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:05,450 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:35:05,450 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 268 [2023-08-30 20:35:05,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:35:13,470 INFO L130 PetriNetUnfolder]: 11844/18508 cut-off events. [2023-08-30 20:35:13,470 INFO L131 PetriNetUnfolder]: For 586407/586407 co-relation queries the response was YES. [2023-08-30 20:35:13,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 198571 conditions, 18508 events. 11844/18508 cut-off events. For 586407/586407 co-relation queries the response was YES. Maximal size of possible extension queue 1067. Compared 128769 event pairs, 2064 based on Foata normal form. 2/18510 useless extension candidates. Maximal degree in co-relation 198117. Up to 13483 conditions per place. [2023-08-30 20:35:13,724 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 1045 selfloop transitions, 807 changer transitions 7/1859 dead transitions. [2023-08-30 20:35:13,724 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 1859 transitions, 47627 flow [2023-08-30 20:35:13,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:35:13,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:35:13,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1066 transitions. [2023-08-30 20:35:13,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30597014925373134 [2023-08-30 20:35:13,725 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1066 transitions. [2023-08-30 20:35:13,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1066 transitions. [2023-08-30 20:35:13,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:35:13,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1066 transitions. [2023-08-30 20:35:13,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 82.0) internal successors, (1066), 13 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:13,728 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:13,728 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:13,728 INFO L175 Difference]: Start difference. First operand has 383 places, 1726 transitions, 41766 flow. Second operand 13 states and 1066 transitions. [2023-08-30 20:35:13,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 1859 transitions, 47627 flow [2023-08-30 20:35:17,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 1859 transitions, 46822 flow, removed 246 selfloop flow, removed 3 redundant places. [2023-08-30 20:35:17,677 INFO L231 Difference]: Finished difference. Result has 396 places, 1757 transitions, 43500 flow [2023-08-30 20:35:17,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=41021, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=776, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=931, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=43500, PETRI_PLACES=396, PETRI_TRANSITIONS=1757} [2023-08-30 20:35:17,678 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2023-08-30 20:35:17,679 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 1757 transitions, 43500 flow [2023-08-30 20:35:17,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 73.78125) internal successors, (2361), 32 states have internal predecessors, (2361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:17,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:35:17,679 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] [2023-08-30 20:35:17,683 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-08-30 20:35:17,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:35:17,880 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:35:17,880 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:35:17,880 INFO L85 PathProgramCache]: Analyzing trace with hash 1223842433, now seen corresponding path program 10 times [2023-08-30 20:35:17,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:35:17,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530904443] [2023-08-30 20:35:17,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:35:17,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:35:17,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:35:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:35:18,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:35:18,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530904443] [2023-08-30 20:35:18,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530904443] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:35:18,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883422022] [2023-08-30 20:35:18,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:35:18,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:35:18,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:35:18,320 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:35:18,321 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-08-30 20:35:18,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:35:18,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:35:18,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 67 conjunts are in the unsatisfiable core [2023-08-30 20:35:18,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:35:18,490 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 [2023-08-30 20:35:18,554 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 [2023-08-30 20:35:18,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:35:18,696 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 [2023-08-30 20:35:18,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:35:18,742 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 [2023-08-30 20:35:18,860 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:35:18,862 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:35:18,862 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 10 [2023-08-30 20:35:18,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:35:18,870 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:35:19,278 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:35:19,278 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 55 treesize of output 44 [2023-08-30 20:35:19,291 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:35:19,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 3350 treesize of output 2974 [2023-08-30 20:35:19,317 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 85 treesize of output 73 [2023-08-30 20:35:19,329 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:35:19,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 158 [2023-08-30 20:35:19,338 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 86 treesize of output 62 [2023-08-30 20:35:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:35:19,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883422022] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:35:19,508 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:35:19,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2023-08-30 20:35:19,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894420835] [2023-08-30 20:35:19,508 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:35:19,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-08-30 20:35:19,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:35:19,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-08-30 20:35:19,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=598, Unknown=9, NotChecked=0, Total=702 [2023-08-30 20:35:22,233 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:35:24,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:35:24,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 268 [2023-08-30 20:35:24,423 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 1757 transitions, 43500 flow. Second operand has 27 states, 27 states have (on average 74.07407407407408) internal successors, (2000), 27 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:24,423 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:35:24,423 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 268 [2023-08-30 20:35:24,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:35:27,907 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2023-08-30 20:35:34,907 INFO L130 PetriNetUnfolder]: 11891/18819 cut-off events. [2023-08-30 20:35:34,907 INFO L131 PetriNetUnfolder]: For 605201/606018 co-relation queries the response was YES. [2023-08-30 20:35:35,084 INFO L83 FinitePrefix]: Finished finitePrefix Result has 205044 conditions, 18819 events. 11891/18819 cut-off events. For 605201/606018 co-relation queries the response was YES. Maximal size of possible extension queue 1146. Compared 135565 event pairs, 1237 based on Foata normal form. 418/19192 useless extension candidates. Maximal degree in co-relation 204579. Up to 12116 conditions per place. [2023-08-30 20:35:35,174 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 952 selfloop transitions, 955 changer transitions 4/1951 dead transitions. [2023-08-30 20:35:35,174 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1951 transitions, 50721 flow [2023-08-30 20:35:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-30 20:35:35,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-30 20:35:35,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1227 transitions. [2023-08-30 20:35:35,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30522388059701494 [2023-08-30 20:35:35,176 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1227 transitions. [2023-08-30 20:35:35,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1227 transitions. [2023-08-30 20:35:35,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:35:35,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1227 transitions. [2023-08-30 20:35:35,178 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 81.8) internal successors, (1227), 15 states have internal predecessors, (1227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:35,179 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:35,180 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 268.0) internal successors, (4288), 16 states have internal predecessors, (4288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:35,180 INFO L175 Difference]: Start difference. First operand has 396 places, 1757 transitions, 43500 flow. Second operand 15 states and 1227 transitions. [2023-08-30 20:35:35,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1951 transitions, 50721 flow [2023-08-30 20:35:39,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 1951 transitions, 48759 flow, removed 163 selfloop flow, removed 8 redundant places. [2023-08-30 20:35:39,355 INFO L231 Difference]: Finished difference. Result has 407 places, 1825 transitions, 46691 flow [2023-08-30 20:35:39,356 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=41755, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1757, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=896, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=829, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=46691, PETRI_PLACES=407, PETRI_TRANSITIONS=1825} [2023-08-30 20:35:39,356 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2023-08-30 20:35:39,357 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1825 transitions, 46691 flow [2023-08-30 20:35:39,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 74.07407407407408) internal successors, (2000), 27 states have internal predecessors, (2000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:39,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:35:39,357 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:35:39,366 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-08-30 20:35:39,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:35:39,564 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:35:39,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:35:39,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1169932795, now seen corresponding path program 11 times [2023-08-30 20:35:39,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:35:39,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002511963] [2023-08-30 20:35:39,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:35:39,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:35:39,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:35:39,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:35:39,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:35:39,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002511963] [2023-08-30 20:35:39,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002511963] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:35:39,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253977169] [2023-08-30 20:35:39,652 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:35:39,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:35:39,653 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:35:39,657 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:35:39,661 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-08-30 20:35:39,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:35:39,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:35:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:35:39,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:35:39,888 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:35:39,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:35:39,957 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:35:39,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253977169] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:35:39,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:35:39,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 20:35:39,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217449800] [2023-08-30 20:35:39,957 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:35:39,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:35:39,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:35:39,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:35:39,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:35:40,135 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 268 [2023-08-30 20:35:40,136 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1825 transitions, 46691 flow. Second operand has 14 states, 14 states have (on average 117.14285714285714) internal successors, (1640), 14 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:40,136 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:35:40,136 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 268 [2023-08-30 20:35:40,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:35:47,818 INFO L130 PetriNetUnfolder]: 11590/18203 cut-off events. [2023-08-30 20:35:47,818 INFO L131 PetriNetUnfolder]: For 774233/778216 co-relation queries the response was YES. [2023-08-30 20:35:47,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 207080 conditions, 18203 events. 11590/18203 cut-off events. For 774233/778216 co-relation queries the response was YES. Maximal size of possible extension queue 1261. Compared 131085 event pairs, 3193 based on Foata normal form. 2006/19608 useless extension candidates. Maximal degree in co-relation 206408. Up to 13044 conditions per place. [2023-08-30 20:35:48,079 INFO L137 encePairwiseOnDemand]: 263/268 looper letters, 1695 selfloop transitions, 222 changer transitions 0/1992 dead transitions. [2023-08-30 20:35:48,079 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1992 transitions, 52896 flow [2023-08-30 20:35:48,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 20:35:48,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 20:35:48,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 863 transitions. [2023-08-30 20:35:48,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4600213219616205 [2023-08-30 20:35:48,080 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 863 transitions. [2023-08-30 20:35:48,080 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 863 transitions. [2023-08-30 20:35:48,080 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:35:48,080 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 863 transitions. [2023-08-30 20:35:48,081 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:48,082 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:48,082 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 268.0) internal successors, (2144), 8 states have internal predecessors, (2144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:48,082 INFO L175 Difference]: Start difference. First operand has 407 places, 1825 transitions, 46691 flow. Second operand 7 states and 863 transitions. [2023-08-30 20:35:48,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1992 transitions, 52896 flow [2023-08-30 20:35:52,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 1992 transitions, 52344 flow, removed 116 selfloop flow, removed 11 redundant places. [2023-08-30 20:35:52,687 INFO L231 Difference]: Finished difference. Result has 402 places, 1772 transitions, 45091 flow [2023-08-30 20:35:52,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=42839, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1712, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=45091, PETRI_PLACES=402, PETRI_TRANSITIONS=1772} [2023-08-30 20:35:52,689 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 372 predicate places. [2023-08-30 20:35:52,689 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 1772 transitions, 45091 flow [2023-08-30 20:35:52,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 117.14285714285714) internal successors, (1640), 14 states have internal predecessors, (1640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:52,690 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:35:52,690 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:35:52,695 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-08-30 20:35:52,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-08-30 20:35:52,895 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:35:52,895 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:35:52,896 INFO L85 PathProgramCache]: Analyzing trace with hash -88994826, now seen corresponding path program 16 times [2023-08-30 20:35:52,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:35:52,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661102688] [2023-08-30 20:35:52,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:35:52,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:35:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:35:53,044 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:35:53,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:35:53,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661102688] [2023-08-30 20:35:53,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661102688] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:35:53,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137942222] [2023-08-30 20:35:53,045 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:35:53,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:35:53,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:35:53,047 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:35:53,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-08-30 20:35:53,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:35:53,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:35:53,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:35:53,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:35:53,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:35:53,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:35:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:35:53,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137942222] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:35:53,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:35:53,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 20:35:53,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544347303] [2023-08-30 20:35:53,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:35:53,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:35:53,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:35:53,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:35:53,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:35:53,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 114 out of 268 [2023-08-30 20:35:53,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 1772 transitions, 45091 flow. Second operand has 14 states, 14 states have (on average 116.5) internal successors, (1631), 14 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:35:53,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:35:53,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 114 of 268 [2023-08-30 20:35:53,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:36:00,891 INFO L130 PetriNetUnfolder]: 10361/16780 cut-off events. [2023-08-30 20:36:00,891 INFO L131 PetriNetUnfolder]: For 745386/749280 co-relation queries the response was YES. [2023-08-30 20:36:01,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 191774 conditions, 16780 events. 10361/16780 cut-off events. For 745386/749280 co-relation queries the response was YES. Maximal size of possible extension queue 1215. Compared 125947 event pairs, 2248 based on Foata normal form. 2117/18317 useless extension candidates. Maximal degree in co-relation 191331. Up to 10202 conditions per place. [2023-08-30 20:36:01,127 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 1578 selfloop transitions, 149 changer transitions 15/1817 dead transitions. [2023-08-30 20:36:01,127 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 1817 transitions, 49390 flow [2023-08-30 20:36:01,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:36:01,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:36:01,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 984 transitions. [2023-08-30 20:36:01,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.458955223880597 [2023-08-30 20:36:01,128 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 984 transitions. [2023-08-30 20:36:01,128 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 984 transitions. [2023-08-30 20:36:01,128 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:36:01,128 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 984 transitions. [2023-08-30 20:36:01,129 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 123.0) internal successors, (984), 8 states have internal predecessors, (984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:01,131 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:01,131 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:01,131 INFO L175 Difference]: Start difference. First operand has 402 places, 1772 transitions, 45091 flow. Second operand 8 states and 984 transitions. [2023-08-30 20:36:01,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 1817 transitions, 49390 flow [2023-08-30 20:36:05,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1817 transitions, 48828 flow, removed 219 selfloop flow, removed 6 redundant places. [2023-08-30 20:36:05,169 INFO L231 Difference]: Finished difference. Result has 405 places, 1599 transitions, 41390 flow [2023-08-30 20:36:05,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=41229, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1464, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=41390, PETRI_PLACES=405, PETRI_TRANSITIONS=1599} [2023-08-30 20:36:05,170 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 375 predicate places. [2023-08-30 20:36:05,170 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 1599 transitions, 41390 flow [2023-08-30 20:36:05,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 116.5) internal successors, (1631), 14 states have internal predecessors, (1631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:05,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:36:05,171 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:36:05,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-08-30 20:36:05,376 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-08-30 20:36:05,376 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:36:05,377 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:36:05,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1859893926, now seen corresponding path program 17 times [2023-08-30 20:36:05,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:36:05,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430551004] [2023-08-30 20:36:05,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:36:05,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:36:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:36:05,526 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:05,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:36:05,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430551004] [2023-08-30 20:36:05,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430551004] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:36:05,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695228015] [2023-08-30 20:36:05,527 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:36:05,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:36:05,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:36:05,529 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:36:05,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-08-30 20:36:05,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:36:05,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:36:05,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 20:36:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:36:05,793 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:05,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:36:05,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:05,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695228015] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:36:05,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:36:05,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2023-08-30 20:36:05,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183477678] [2023-08-30 20:36:05,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:36:05,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:36:05,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:36:05,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:36:05,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:36:06,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 268 [2023-08-30 20:36:06,190 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 1599 transitions, 41390 flow. Second operand has 17 states, 17 states have (on average 114.94117647058823) internal successors, (1954), 17 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:06,190 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:36:06,191 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 268 [2023-08-30 20:36:06,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:36:12,878 INFO L130 PetriNetUnfolder]: 9424/15690 cut-off events. [2023-08-30 20:36:12,878 INFO L131 PetriNetUnfolder]: For 696147/698937 co-relation queries the response was YES. [2023-08-30 20:36:13,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 179282 conditions, 15690 events. 9424/15690 cut-off events. For 696147/698937 co-relation queries the response was YES. Maximal size of possible extension queue 1153. Compared 121221 event pairs, 1549 based on Foata normal form. 1872/17193 useless extension candidates. Maximal degree in co-relation 178841. Up to 6245 conditions per place. [2023-08-30 20:36:13,086 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 1424 selfloop transitions, 262 changer transitions 194/1976 dead transitions. [2023-08-30 20:36:13,086 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1976 transitions, 51526 flow [2023-08-30 20:36:13,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:36:13,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:36:13,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1094 transitions. [2023-08-30 20:36:13,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45356550580431176 [2023-08-30 20:36:13,088 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1094 transitions. [2023-08-30 20:36:13,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1094 transitions. [2023-08-30 20:36:13,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:36:13,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1094 transitions. [2023-08-30 20:36:13,089 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 121.55555555555556) internal successors, (1094), 9 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:13,090 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:13,090 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:13,090 INFO L175 Difference]: Start difference. First operand has 405 places, 1599 transitions, 41390 flow. Second operand 9 states and 1094 transitions. [2023-08-30 20:36:13,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1976 transitions, 51526 flow [2023-08-30 20:36:16,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 1976 transitions, 50768 flow, removed 46 selfloop flow, removed 7 redundant places. [2023-08-30 20:36:16,951 INFO L231 Difference]: Finished difference. Result has 407 places, 1382 transitions, 35272 flow [2023-08-30 20:36:16,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=38840, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=232, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=35272, PETRI_PLACES=407, PETRI_TRANSITIONS=1382} [2023-08-30 20:36:16,952 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 377 predicate places. [2023-08-30 20:36:16,952 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 1382 transitions, 35272 flow [2023-08-30 20:36:16,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 114.94117647058823) internal successors, (1954), 17 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:16,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:36:16,953 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] [2023-08-30 20:36:16,961 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-08-30 20:36:17,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-08-30 20:36:17,159 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:36:17,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:36:17,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1493996666, now seen corresponding path program 1 times [2023-08-30 20:36:17,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:36:17,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66473531] [2023-08-30 20:36:17,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:36:17,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:36:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:36:17,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:17,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:36:17,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66473531] [2023-08-30 20:36:17,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66473531] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:36:17,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611723411] [2023-08-30 20:36:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:36:17,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:36:17,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:36:17,253 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:36:17,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-08-30 20:36:17,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:36:17,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 20:36:17,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:36:17,467 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:17,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:36:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:17,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611723411] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:36:17,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:36:17,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:36:17,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685421315] [2023-08-30 20:36:17,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:36:17,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:36:17,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:36:17,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:36:17,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:36:17,748 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:36:17,749 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 1382 transitions, 35272 flow. Second operand has 16 states, 16 states have (on average 110.1875) internal successors, (1763), 16 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:17,749 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:36:17,749 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:36:17,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:36:24,005 INFO L130 PetriNetUnfolder]: 9504/15750 cut-off events. [2023-08-30 20:36:24,005 INFO L131 PetriNetUnfolder]: For 630853/630988 co-relation queries the response was YES. [2023-08-30 20:36:24,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180226 conditions, 15750 events. 9504/15750 cut-off events. For 630853/630988 co-relation queries the response was YES. Maximal size of possible extension queue 1037. Compared 118505 event pairs, 1177 based on Foata normal form. 551/16242 useless extension candidates. Maximal degree in co-relation 179785. Up to 6567 conditions per place. [2023-08-30 20:36:24,365 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 1290 selfloop transitions, 269 changer transitions 84/1700 dead transitions. [2023-08-30 20:36:24,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 1700 transitions, 43457 flow [2023-08-30 20:36:24,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:36:24,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:36:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1411 transitions. [2023-08-30 20:36:24,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387437810945274 [2023-08-30 20:36:24,367 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1411 transitions. [2023-08-30 20:36:24,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1411 transitions. [2023-08-30 20:36:24,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:36:24,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1411 transitions. [2023-08-30 20:36:24,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 117.58333333333333) internal successors, (1411), 12 states have internal predecessors, (1411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:24,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:24,369 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:24,369 INFO L175 Difference]: Start difference. First operand has 407 places, 1382 transitions, 35272 flow. Second operand 12 states and 1411 transitions. [2023-08-30 20:36:24,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 1700 transitions, 43457 flow [2023-08-30 20:36:28,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 1700 transitions, 42563 flow, removed 79 selfloop flow, removed 6 redundant places. [2023-08-30 20:36:28,659 INFO L231 Difference]: Finished difference. Result has 406 places, 1363 transitions, 34645 flow [2023-08-30 20:36:28,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=34219, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=34645, PETRI_PLACES=406, PETRI_TRANSITIONS=1363} [2023-08-30 20:36:28,660 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 376 predicate places. [2023-08-30 20:36:28,660 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 1363 transitions, 34645 flow [2023-08-30 20:36:28,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 110.1875) internal successors, (1763), 16 states have internal predecessors, (1763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:28,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:36:28,661 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] [2023-08-30 20:36:28,668 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-08-30 20:36:28,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-08-30 20:36:28,861 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:36:28,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:36:28,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1316749400, now seen corresponding path program 2 times [2023-08-30 20:36:28,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:36:28,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688674776] [2023-08-30 20:36:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:36:28,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:36:28,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:36:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:28,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:36:28,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688674776] [2023-08-30 20:36:28,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688674776] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:36:28,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490930745] [2023-08-30 20:36:28,969 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:36:28,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:36:28,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:36:28,973 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:36:28,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-08-30 20:36:29,135 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:36:29,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:36:29,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 20:36:29,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:36:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:29,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:36:29,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:29,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490930745] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:36:29,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:36:29,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 20:36:29,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755655218] [2023-08-30 20:36:29,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:36:29,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:36:29,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:36:29,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:36:29,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:36:29,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:36:29,611 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 1363 transitions, 34645 flow. Second operand has 17 states, 17 states have (on average 110.17647058823529) internal successors, (1873), 17 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:29,611 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:36:29,611 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:36:29,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:36:35,946 INFO L130 PetriNetUnfolder]: 9271/15354 cut-off events. [2023-08-30 20:36:35,946 INFO L131 PetriNetUnfolder]: For 614376/614565 co-relation queries the response was YES. [2023-08-30 20:36:36,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177549 conditions, 15354 events. 9271/15354 cut-off events. For 614376/614565 co-relation queries the response was YES. Maximal size of possible extension queue 1033. Compared 114759 event pairs, 554 based on Foata normal form. 475/15795 useless extension candidates. Maximal degree in co-relation 177106. Up to 5073 conditions per place. [2023-08-30 20:36:36,202 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 1533 selfloop transitions, 472 changer transitions 82/2144 dead transitions. [2023-08-30 20:36:36,202 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 2144 transitions, 52391 flow [2023-08-30 20:36:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:36:36,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:36:36,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2119 transitions. [2023-08-30 20:36:36,204 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4392620232172471 [2023-08-30 20:36:36,205 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2119 transitions. [2023-08-30 20:36:36,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2119 transitions. [2023-08-30 20:36:36,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:36:36,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2119 transitions. [2023-08-30 20:36:36,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 117.72222222222223) internal successors, (2119), 18 states have internal predecessors, (2119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:36,209 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:36,209 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:36,209 INFO L175 Difference]: Start difference. First operand has 406 places, 1363 transitions, 34645 flow. Second operand 18 states and 2119 transitions. [2023-08-30 20:36:36,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 2144 transitions, 52391 flow [2023-08-30 20:36:40,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 2144 transitions, 51636 flow, removed 296 selfloop flow, removed 6 redundant places. [2023-08-30 20:36:40,567 INFO L231 Difference]: Finished difference. Result has 421 places, 1493 transitions, 38586 flow [2023-08-30 20:36:40,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=34172, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=307, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1028, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=38586, PETRI_PLACES=421, PETRI_TRANSITIONS=1493} [2023-08-30 20:36:40,568 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 391 predicate places. [2023-08-30 20:36:40,568 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 1493 transitions, 38586 flow [2023-08-30 20:36:40,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 110.17647058823529) internal successors, (1873), 17 states have internal predecessors, (1873), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:40,568 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:36:40,568 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] [2023-08-30 20:36:40,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-08-30 20:36:40,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:36:40,769 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:36:40,769 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:36:40,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1348915972, now seen corresponding path program 3 times [2023-08-30 20:36:40,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:36:40,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572932855] [2023-08-30 20:36:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:36:40,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:36:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:36:40,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:40,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:36:40,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572932855] [2023-08-30 20:36:40,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572932855] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:36:40,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138702605] [2023-08-30 20:36:40,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:36:40,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:36:40,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:36:40,852 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:36:40,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-08-30 20:36:40,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 20:36:40,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:36:40,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 20:36:40,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:36:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:41,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:36:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:36:41,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138702605] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:36:41,143 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:36:41,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 20:36:41,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057150690] [2023-08-30 20:36:41,143 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:36:41,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:36:41,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:36:41,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:36:41,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:36:41,427 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:36:41,428 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 1493 transitions, 38586 flow. Second operand has 18 states, 18 states have (on average 110.05555555555556) internal successors, (1981), 18 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:41,428 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:36:41,428 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:36:41,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:36:47,871 INFO L130 PetriNetUnfolder]: 9136/14843 cut-off events. [2023-08-30 20:36:47,871 INFO L131 PetriNetUnfolder]: For 627467/627664 co-relation queries the response was YES. [2023-08-30 20:36:48,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180707 conditions, 14843 events. 9136/14843 cut-off events. For 627467/627664 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 107169 event pairs, 632 based on Foata normal form. 438/15247 useless extension candidates. Maximal degree in co-relation 180260. Up to 4854 conditions per place. [2023-08-30 20:36:48,092 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 1526 selfloop transitions, 447 changer transitions 45/2075 dead transitions. [2023-08-30 20:36:48,092 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 2075 transitions, 52085 flow [2023-08-30 20:36:48,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:36:48,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:36:48,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1987 transitions. [2023-08-30 20:36:48,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43612818261633013 [2023-08-30 20:36:48,094 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1987 transitions. [2023-08-30 20:36:48,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1987 transitions. [2023-08-30 20:36:48,095 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:36:48,095 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1987 transitions. [2023-08-30 20:36:48,096 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 116.88235294117646) internal successors, (1987), 17 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:48,098 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:48,098 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:48,098 INFO L175 Difference]: Start difference. First operand has 421 places, 1493 transitions, 38586 flow. Second operand 17 states and 1987 transitions. [2023-08-30 20:36:48,098 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 2075 transitions, 52085 flow [2023-08-30 20:36:52,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 2075 transitions, 50929 flow, removed 266 selfloop flow, removed 12 redundant places. [2023-08-30 20:36:52,999 INFO L231 Difference]: Finished difference. Result has 426 places, 1445 transitions, 37403 flow [2023-08-30 20:36:52,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=34921, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=373, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1015, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=37403, PETRI_PLACES=426, PETRI_TRANSITIONS=1445} [2023-08-30 20:36:53,000 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 396 predicate places. [2023-08-30 20:36:53,000 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 1445 transitions, 37403 flow [2023-08-30 20:36:53,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 110.05555555555556) internal successors, (1981), 18 states have internal predecessors, (1981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:53,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:36:53,000 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] [2023-08-30 20:36:53,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-08-30 20:36:53,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-08-30 20:36:53,205 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:36:53,205 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:36:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash 661914682, now seen corresponding path program 4 times [2023-08-30 20:36:53,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:36:53,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094138052] [2023-08-30 20:36:53,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:36:53,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:36:53,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:36:53,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:36:53,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:36:53,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094138052] [2023-08-30 20:36:53,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094138052] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:36:53,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524691871] [2023-08-30 20:36:53,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:36:53,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:36:53,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:36:53,289 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:36:53,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-08-30 20:36:53,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:36:53,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:36:53,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 20:36:53,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:36:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:36:53,513 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:36:53,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:36:53,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524691871] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:36:53,606 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:36:53,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 20:36:53,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838545660] [2023-08-30 20:36:53,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:36:53,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:36:53,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:36:53,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:36:53,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:36:53,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:36:53,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 1445 transitions, 37403 flow. Second operand has 18 states, 18 states have (on average 110.38888888888889) internal successors, (1987), 18 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:36:53,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:36:53,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:36:53,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:37:00,322 INFO L130 PetriNetUnfolder]: 9306/14956 cut-off events. [2023-08-30 20:37:00,322 INFO L131 PetriNetUnfolder]: For 582334/582517 co-relation queries the response was YES. [2023-08-30 20:37:00,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180778 conditions, 14956 events. 9306/14956 cut-off events. For 582334/582517 co-relation queries the response was YES. Maximal size of possible extension queue 1018. Compared 106497 event pairs, 596 based on Foata normal form. 422/15341 useless extension candidates. Maximal degree in co-relation 180356. Up to 4896 conditions per place. [2023-08-30 20:37:00,548 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 1461 selfloop transitions, 502 changer transitions 35/2055 dead transitions. [2023-08-30 20:37:00,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 2055 transitions, 51125 flow [2023-08-30 20:37:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:37:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:37:00,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1990 transitions. [2023-08-30 20:37:00,550 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367866549604917 [2023-08-30 20:37:00,550 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1990 transitions. [2023-08-30 20:37:00,551 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1990 transitions. [2023-08-30 20:37:00,551 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:37:00,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1990 transitions. [2023-08-30 20:37:00,553 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 117.05882352941177) internal successors, (1990), 17 states have internal predecessors, (1990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:00,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:00,556 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:00,556 INFO L175 Difference]: Start difference. First operand has 426 places, 1445 transitions, 37403 flow. Second operand 17 states and 1990 transitions. [2023-08-30 20:37:00,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 2055 transitions, 51125 flow [2023-08-30 20:37:04,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 2055 transitions, 50833 flow, removed 59 selfloop flow, removed 6 redundant places. [2023-08-30 20:37:04,945 INFO L231 Difference]: Finished difference. Result has 440 places, 1514 transitions, 39787 flow [2023-08-30 20:37:04,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=36796, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=963, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=39787, PETRI_PLACES=440, PETRI_TRANSITIONS=1514} [2023-08-30 20:37:04,946 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 410 predicate places. [2023-08-30 20:37:04,946 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 1514 transitions, 39787 flow [2023-08-30 20:37:04,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 110.38888888888889) internal successors, (1987), 18 states have internal predecessors, (1987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:04,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:37:04,947 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] [2023-08-30 20:37:04,952 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-08-30 20:37:05,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-08-30 20:37:05,147 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:37:05,148 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:37:05,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1012475994, now seen corresponding path program 5 times [2023-08-30 20:37:05,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:37:05,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386473414] [2023-08-30 20:37:05,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:37:05,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:37:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:37:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:05,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:37:05,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386473414] [2023-08-30 20:37:05,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386473414] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:37:05,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343477345] [2023-08-30 20:37:05,230 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:37:05,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:37:05,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:37:05,231 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:37:05,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-08-30 20:37:05,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:37:05,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:37:05,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 20:37:05,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:37:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:05,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:37:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:05,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343477345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:37:05,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:37:05,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 20:37:05,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709547454] [2023-08-30 20:37:05,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:37:05,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-30 20:37:05,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:37:05,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-30 20:37:05,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-08-30 20:37:05,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:37:05,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1514 transitions, 39787 flow. Second operand has 17 states, 17 states have (on average 110.29411764705883) internal successors, (1875), 17 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:05,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:37:05,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:37:05,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:37:12,283 INFO L130 PetriNetUnfolder]: 9082/14752 cut-off events. [2023-08-30 20:37:12,283 INFO L131 PetriNetUnfolder]: For 591445/591645 co-relation queries the response was YES. [2023-08-30 20:37:12,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 183036 conditions, 14752 events. 9082/14752 cut-off events. For 591445/591645 co-relation queries the response was YES. Maximal size of possible extension queue 1025. Compared 106935 event pairs, 594 based on Foata normal form. 367/15082 useless extension candidates. Maximal degree in co-relation 182610. Up to 4870 conditions per place. [2023-08-30 20:37:12,510 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 1406 selfloop transitions, 373 changer transitions 41/1876 dead transitions. [2023-08-30 20:37:12,510 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 1876 transitions, 48541 flow [2023-08-30 20:37:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:37:12,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:37:12,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1650 transitions. [2023-08-30 20:37:12,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43976545842217485 [2023-08-30 20:37:12,512 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1650 transitions. [2023-08-30 20:37:12,512 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1650 transitions. [2023-08-30 20:37:12,512 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:37:12,512 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1650 transitions. [2023-08-30 20:37:12,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 117.85714285714286) internal successors, (1650), 14 states have internal predecessors, (1650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:12,515 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:12,515 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:12,515 INFO L175 Difference]: Start difference. First operand has 440 places, 1514 transitions, 39787 flow. Second operand 14 states and 1650 transitions. [2023-08-30 20:37:12,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 1876 transitions, 48541 flow [2023-08-30 20:37:17,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 1876 transitions, 47749 flow, removed 49 selfloop flow, removed 8 redundant places. [2023-08-30 20:37:17,349 INFO L231 Difference]: Finished difference. Result has 444 places, 1416 transitions, 37217 flow [2023-08-30 20:37:17,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=37660, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=371, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1079, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=37217, PETRI_PLACES=444, PETRI_TRANSITIONS=1416} [2023-08-30 20:37:17,350 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 414 predicate places. [2023-08-30 20:37:17,350 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 1416 transitions, 37217 flow [2023-08-30 20:37:17,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 110.29411764705883) internal successors, (1875), 17 states have internal predecessors, (1875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:17,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:37:17,351 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] [2023-08-30 20:37:17,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2023-08-30 20:37:17,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-08-30 20:37:17,551 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:37:17,551 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:37:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1682550406, now seen corresponding path program 6 times [2023-08-30 20:37:17,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:37:17,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998640302] [2023-08-30 20:37:17,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:37:17,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:37:17,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:37:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:17,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:37:17,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998640302] [2023-08-30 20:37:17,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998640302] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:37:17,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169606853] [2023-08-30 20:37:17,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:37:17,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:37:17,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:37:17,635 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:37:17,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-08-30 20:37:17,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 20:37:17,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:37:17,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 9 conjunts are in the unsatisfiable core [2023-08-30 20:37:17,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:37:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:17,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:37:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:17,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169606853] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:37:17,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:37:17,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-08-30 20:37:17,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276365301] [2023-08-30 20:37:17,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:37:17,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:37:17,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:37:17,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:37:17,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:37:18,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:37:18,124 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 1416 transitions, 37217 flow. Second operand has 16 states, 16 states have (on average 110.3125) internal successors, (1765), 16 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:18,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:37:18,125 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:37:18,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:37:24,523 INFO L130 PetriNetUnfolder]: 8828/14803 cut-off events. [2023-08-30 20:37:24,523 INFO L131 PetriNetUnfolder]: For 588114/588326 co-relation queries the response was YES. [2023-08-30 20:37:24,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 171813 conditions, 14803 events. 8828/14803 cut-off events. For 588114/588326 co-relation queries the response was YES. Maximal size of possible extension queue 1062. Compared 112454 event pairs, 641 based on Foata normal form. 639/15405 useless extension candidates. Maximal degree in co-relation 171656. Up to 4931 conditions per place. [2023-08-30 20:37:24,735 INFO L137 encePairwiseOnDemand]: 259/268 looper letters, 1277 selfloop transitions, 289 changer transitions 104/1722 dead transitions. [2023-08-30 20:37:24,735 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 1722 transitions, 43067 flow [2023-08-30 20:37:24,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:37:24,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:37:24,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1635 transitions. [2023-08-30 20:37:24,736 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43576759061833686 [2023-08-30 20:37:24,736 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1635 transitions. [2023-08-30 20:37:24,736 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1635 transitions. [2023-08-30 20:37:24,737 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:37:24,737 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1635 transitions. [2023-08-30 20:37:24,738 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 116.78571428571429) internal successors, (1635), 14 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:24,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:24,740 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:24,740 INFO L175 Difference]: Start difference. First operand has 444 places, 1416 transitions, 37217 flow. Second operand 14 states and 1635 transitions. [2023-08-30 20:37:24,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 1722 transitions, 43067 flow [2023-08-30 20:37:28,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 1722 transitions, 41957 flow, removed 262 selfloop flow, removed 12 redundant places. [2023-08-30 20:37:28,667 INFO L231 Difference]: Finished difference. Result has 433 places, 1188 transitions, 30426 flow [2023-08-30 20:37:28,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=31191, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=964, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=30426, PETRI_PLACES=433, PETRI_TRANSITIONS=1188} [2023-08-30 20:37:28,668 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 403 predicate places. [2023-08-30 20:37:28,668 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 1188 transitions, 30426 flow [2023-08-30 20:37:28,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 110.3125) internal successors, (1765), 16 states have internal predecessors, (1765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:28,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:37:28,669 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:37:28,676 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2023-08-30 20:37:28,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:37:28,869 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:37:28,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:37:28,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1987736602, now seen corresponding path program 12 times [2023-08-30 20:37:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:37:28,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179193931] [2023-08-30 20:37:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:37:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:37:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:37:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:28,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:37:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179193931] [2023-08-30 20:37:28,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179193931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:37:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791181552] [2023-08-30 20:37:28,959 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:37:28,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:37:28,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:37:28,960 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:37:28,961 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-08-30 20:37:29,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:37:29,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:37:29,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-30 20:37:29,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:37:29,252 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:29,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:37:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:29,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791181552] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:37:29,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:37:29,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-08-30 20:37:29,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627503054] [2023-08-30 20:37:29,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:37:29,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-08-30 20:37:29,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:37:29,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-08-30 20:37:29,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2023-08-30 20:37:29,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 268 [2023-08-30 20:37:29,538 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 1188 transitions, 30426 flow. Second operand has 14 states, 14 states have (on average 115.14285714285714) internal successors, (1612), 14 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:29,538 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:37:29,538 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 268 [2023-08-30 20:37:29,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:37:32,823 INFO L130 PetriNetUnfolder]: 5387/8859 cut-off events. [2023-08-30 20:37:32,823 INFO L131 PetriNetUnfolder]: For 415576/416155 co-relation queries the response was YES. [2023-08-30 20:37:32,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116595 conditions, 8859 events. 5387/8859 cut-off events. For 415576/416155 co-relation queries the response was YES. Maximal size of possible extension queue 692. Compared 61084 event pairs, 702 based on Foata normal form. 813/9589 useless extension candidates. Maximal degree in co-relation 116441. Up to 3427 conditions per place. [2023-08-30 20:37:32,942 INFO L137 encePairwiseOnDemand]: 262/268 looper letters, 757 selfloop transitions, 39 changer transitions 333/1188 dead transitions. [2023-08-30 20:37:32,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 1188 transitions, 32386 flow [2023-08-30 20:37:32,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 20:37:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 20:37:32,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 962 transitions. [2023-08-30 20:37:32,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44869402985074625 [2023-08-30 20:37:32,944 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 962 transitions. [2023-08-30 20:37:32,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 962 transitions. [2023-08-30 20:37:32,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:37:32,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 962 transitions. [2023-08-30 20:37:32,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 120.25) internal successors, (962), 8 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:32,946 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:32,946 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 268.0) internal successors, (2412), 9 states have internal predecessors, (2412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:32,946 INFO L175 Difference]: Start difference. First operand has 433 places, 1188 transitions, 30426 flow. Second operand 8 states and 962 transitions. [2023-08-30 20:37:32,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 1188 transitions, 32386 flow [2023-08-30 20:37:34,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 1188 transitions, 31490 flow, removed 81 selfloop flow, removed 25 redundant places. [2023-08-30 20:37:34,925 INFO L231 Difference]: Finished difference. Result has 378 places, 772 transitions, 18984 flow [2023-08-30 20:37:34,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=27602, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1059, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1020, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=18984, PETRI_PLACES=378, PETRI_TRANSITIONS=772} [2023-08-30 20:37:34,926 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 348 predicate places. [2023-08-30 20:37:34,926 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 772 transitions, 18984 flow [2023-08-30 20:37:34,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 115.14285714285714) internal successors, (1612), 14 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:34,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:37:34,927 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:37:34,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-08-30 20:37:35,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:37:35,127 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:37:35,128 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:37:35,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1307493512, now seen corresponding path program 18 times [2023-08-30 20:37:35,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:37:35,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304678412] [2023-08-30 20:37:35,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:37:35,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:37:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:37:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:35,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:37:35,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304678412] [2023-08-30 20:37:35,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304678412] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:37:35,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557177098] [2023-08-30 20:37:35,212 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:37:35,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:37:35,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:37:35,213 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:37:35,215 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-08-30 20:37:35,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:37:35,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:37:35,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:37:35,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:37:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:35,469 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:37:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:35,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557177098] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:37:35,560 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:37:35,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-30 20:37:35,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676691947] [2023-08-30 20:37:35,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:37:35,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:37:35,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:37:35,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:37:35,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:37:35,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:37:35,915 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 772 transitions, 18984 flow. Second operand has 19 states, 19 states have (on average 110.42105263157895) internal successors, (2098), 19 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:35,915 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:37:35,915 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:37:35,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:37:38,582 INFO L130 PetriNetUnfolder]: 5315/8213 cut-off events. [2023-08-30 20:37:38,582 INFO L131 PetriNetUnfolder]: For 368665/368856 co-relation queries the response was YES. [2023-08-30 20:37:38,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105999 conditions, 8213 events. 5315/8213 cut-off events. For 368665/368856 co-relation queries the response was YES. Maximal size of possible extension queue 575. Compared 49370 event pairs, 433 based on Foata normal form. 192/8381 useless extension candidates. Maximal degree in co-relation 105859. Up to 2968 conditions per place. [2023-08-30 20:37:38,702 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 722 selfloop transitions, 494 changer transitions 0/1247 dead transitions. [2023-08-30 20:37:38,702 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1247 transitions, 30676 flow [2023-08-30 20:37:38,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:37:38,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:37:38,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1528 transitions. [2023-08-30 20:37:38,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43857634902411025 [2023-08-30 20:37:38,705 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1528 transitions. [2023-08-30 20:37:38,705 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1528 transitions. [2023-08-30 20:37:38,705 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:37:38,705 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1528 transitions. [2023-08-30 20:37:38,707 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 117.53846153846153) internal successors, (1528), 13 states have internal predecessors, (1528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:38,709 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:38,709 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:38,709 INFO L175 Difference]: Start difference. First operand has 378 places, 772 transitions, 18984 flow. Second operand 13 states and 1528 transitions. [2023-08-30 20:37:38,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1247 transitions, 30676 flow [2023-08-30 20:37:40,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 1247 transitions, 28370 flow, removed 360 selfloop flow, removed 24 redundant places. [2023-08-30 20:37:40,133 INFO L231 Difference]: Finished difference. Result has 305 places, 926 transitions, 22041 flow [2023-08-30 20:37:40,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=17499, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=772, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=360, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=22041, PETRI_PLACES=305, PETRI_TRANSITIONS=926} [2023-08-30 20:37:40,134 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 275 predicate places. [2023-08-30 20:37:40,134 INFO L495 AbstractCegarLoop]: Abstraction has has 305 places, 926 transitions, 22041 flow [2023-08-30 20:37:40,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 110.42105263157895) internal successors, (2098), 19 states have internal predecessors, (2098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:40,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:37:40,134 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:37:40,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-08-30 20:37:40,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-08-30 20:37:40,337 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:37:40,337 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:37:40,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1291776532, now seen corresponding path program 19 times [2023-08-30 20:37:40,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:37:40,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993997992] [2023-08-30 20:37:40,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:37:40,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:37:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:37:40,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:37:40,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:37:40,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993997992] [2023-08-30 20:37:40,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993997992] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:37:40,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614121791] [2023-08-30 20:37:40,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:37:40,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:37:40,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:37:40,439 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:37:40,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-08-30 20:37:40,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:37:40,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:37:40,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:37:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:37:40,678 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:37:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:37:40,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614121791] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:37:40,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:37:40,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-30 20:37:40,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246100714] [2023-08-30 20:37:40,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:37:40,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:37:40,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:37:40,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:37:40,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:37:41,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:37:41,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 305 places, 926 transitions, 22041 flow. Second operand has 18 states, 18 states have (on average 110.11111111111111) internal successors, (1982), 18 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:41,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:37:41,032 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:37:41,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:37:43,508 INFO L130 PetriNetUnfolder]: 5217/8019 cut-off events. [2023-08-30 20:37:43,509 INFO L131 PetriNetUnfolder]: For 323128/323351 co-relation queries the response was YES. [2023-08-30 20:37:43,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100806 conditions, 8019 events. 5217/8019 cut-off events. For 323128/323351 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 47505 event pairs, 408 based on Foata normal form. 199/8207 useless extension candidates. Maximal degree in co-relation 100679. Up to 2858 conditions per place. [2023-08-30 20:37:43,791 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 761 selfloop transitions, 427 changer transitions 0/1219 dead transitions. [2023-08-30 20:37:43,791 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 1219 transitions, 29839 flow [2023-08-30 20:37:43,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:37:43,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:37:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1282 transitions. [2023-08-30 20:37:43,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43487109905020355 [2023-08-30 20:37:43,793 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1282 transitions. [2023-08-30 20:37:43,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1282 transitions. [2023-08-30 20:37:43,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:37:43,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1282 transitions. [2023-08-30 20:37:43,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 116.54545454545455) internal successors, (1282), 11 states have internal predecessors, (1282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:43,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:43,796 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:43,796 INFO L175 Difference]: Start difference. First operand has 305 places, 926 transitions, 22041 flow. Second operand 11 states and 1282 transitions. [2023-08-30 20:37:43,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 1219 transitions, 29839 flow [2023-08-30 20:37:44,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 1219 transitions, 29338 flow, removed 180 selfloop flow, removed 5 redundant places. [2023-08-30 20:37:44,957 INFO L231 Difference]: Finished difference. Result has 313 places, 955 transitions, 23519 flow [2023-08-30 20:37:44,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=21509, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=924, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=23519, PETRI_PLACES=313, PETRI_TRANSITIONS=955} [2023-08-30 20:37:44,958 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2023-08-30 20:37:44,959 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 955 transitions, 23519 flow [2023-08-30 20:37:44,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 110.11111111111111) internal successors, (1982), 18 states have internal predecessors, (1982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:44,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:37:44,959 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:37:44,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-08-30 20:37:45,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-08-30 20:37:45,165 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:37:45,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:37:45,165 INFO L85 PathProgramCache]: Analyzing trace with hash 775292912, now seen corresponding path program 20 times [2023-08-30 20:37:45,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:37:45,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893941679] [2023-08-30 20:37:45,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:37:45,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:37:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:37:45,278 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:45,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:37:45,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893941679] [2023-08-30 20:37:45,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893941679] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:37:45,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460912069] [2023-08-30 20:37:45,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:37:45,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:37:45,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:37:45,280 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:37:45,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-08-30 20:37:45,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:37:45,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:37:45,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:37:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:37:45,533 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:45,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:37:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:45,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460912069] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:37:45,635 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:37:45,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-30 20:37:45,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173508160] [2023-08-30 20:37:45,635 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:37:45,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:37:45,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:37:45,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:37:45,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:37:45,976 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:37:45,977 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 955 transitions, 23519 flow. Second operand has 20 states, 20 states have (on average 110.2) internal successors, (2204), 20 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:45,977 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:37:45,977 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:37:45,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:37:48,907 INFO L130 PetriNetUnfolder]: 5452/8443 cut-off events. [2023-08-30 20:37:48,907 INFO L131 PetriNetUnfolder]: For 347248/347435 co-relation queries the response was YES. [2023-08-30 20:37:48,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107450 conditions, 8443 events. 5452/8443 cut-off events. For 347248/347435 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 51116 event pairs, 761 based on Foata normal form. 170/8581 useless extension candidates. Maximal degree in co-relation 107320. Up to 4310 conditions per place. [2023-08-30 20:37:49,021 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 814 selfloop transitions, 432 changer transitions 0/1277 dead transitions. [2023-08-30 20:37:49,021 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 1277 transitions, 31839 flow [2023-08-30 20:37:49,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-08-30 20:37:49,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2023-08-30 20:37:49,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 1396 transitions. [2023-08-30 20:37:49,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43407960199004975 [2023-08-30 20:37:49,023 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 1396 transitions. [2023-08-30 20:37:49,023 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 1396 transitions. [2023-08-30 20:37:49,024 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:37:49,024 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 1396 transitions. [2023-08-30 20:37:49,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 116.33333333333333) internal successors, (1396), 12 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:49,027 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:49,028 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 268.0) internal successors, (3484), 13 states have internal predecessors, (3484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:49,028 INFO L175 Difference]: Start difference. First operand has 313 places, 955 transitions, 23519 flow. Second operand 12 states and 1396 transitions. [2023-08-30 20:37:49,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 1277 transitions, 31839 flow [2023-08-30 20:37:50,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 1277 transitions, 30903 flow, removed 250 selfloop flow, removed 6 redundant places. [2023-08-30 20:37:50,421 INFO L231 Difference]: Finished difference. Result has 322 places, 1024 transitions, 25337 flow [2023-08-30 20:37:50,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=22646, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=954, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=25337, PETRI_PLACES=322, PETRI_TRANSITIONS=1024} [2023-08-30 20:37:50,422 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2023-08-30 20:37:50,422 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 1024 transitions, 25337 flow [2023-08-30 20:37:50,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.2) internal successors, (2204), 20 states have internal predecessors, (2204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:50,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:37:50,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:37:50,432 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-08-30 20:37:50,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-08-30 20:37:50,632 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:37:50,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:37:50,633 INFO L85 PathProgramCache]: Analyzing trace with hash -2089231034, now seen corresponding path program 13 times [2023-08-30 20:37:50,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:37:50,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745528349] [2023-08-30 20:37:50,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:37:50,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:37:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:37:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:50,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:37:50,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745528349] [2023-08-30 20:37:50,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745528349] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:37:50,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707742683] [2023-08-30 20:37:50,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:37:50,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:37:50,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:37:50,723 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:37:50,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-08-30 20:37:50,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:37:50,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:37:50,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:37:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:51,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:37:51,170 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:37:51,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707742683] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:37:51,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:37:51,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-30 20:37:51,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383472569] [2023-08-30 20:37:51,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:37:51,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:37:51,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:37:51,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:37:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:37:51,470 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:37:51,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 1024 transitions, 25337 flow. Second operand has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:51,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:37:51,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:37:51,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:37:55,481 INFO L130 PetriNetUnfolder]: 6765/10483 cut-off events. [2023-08-30 20:37:55,481 INFO L131 PetriNetUnfolder]: For 440513/440713 co-relation queries the response was YES. [2023-08-30 20:37:55,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135787 conditions, 10483 events. 6765/10483 cut-off events. For 440513/440713 co-relation queries the response was YES. Maximal size of possible extension queue 637. Compared 64846 event pairs, 584 based on Foata normal form. 141/10604 useless extension candidates. Maximal degree in co-relation 135653. Up to 3825 conditions per place. [2023-08-30 20:37:55,652 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 875 selfloop transitions, 530 changer transitions 0/1436 dead transitions. [2023-08-30 20:37:55,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 1436 transitions, 35762 flow [2023-08-30 20:37:55,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-08-30 20:37:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-08-30 20:37:55,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2107 transitions. [2023-08-30 20:37:55,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4367744610281924 [2023-08-30 20:37:55,654 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2107 transitions. [2023-08-30 20:37:55,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2107 transitions. [2023-08-30 20:37:55,655 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:37:55,655 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2107 transitions. [2023-08-30 20:37:55,657 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 117.05555555555556) internal successors, (2107), 18 states have internal predecessors, (2107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:55,660 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:55,660 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 268.0) internal successors, (5092), 19 states have internal predecessors, (5092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:55,660 INFO L175 Difference]: Start difference. First operand has 322 places, 1024 transitions, 25337 flow. Second operand 18 states and 2107 transitions. [2023-08-30 20:37:55,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 1436 transitions, 35762 flow [2023-08-30 20:37:57,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 1436 transitions, 35076 flow, removed 151 selfloop flow, removed 6 redundant places. [2023-08-30 20:37:57,576 INFO L231 Difference]: Finished difference. Result has 336 places, 1070 transitions, 27298 flow [2023-08-30 20:37:57,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=24629, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1022, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=490, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=27298, PETRI_PLACES=336, PETRI_TRANSITIONS=1070} [2023-08-30 20:37:57,577 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2023-08-30 20:37:57,577 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 1070 transitions, 27298 flow [2023-08-30 20:37:57,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 110.0) internal successors, (2200), 20 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:57,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:37:57,577 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:37:57,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-08-30 20:37:57,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:37:57,781 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:37:57,781 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:37:57,781 INFO L85 PathProgramCache]: Analyzing trace with hash -934351344, now seen corresponding path program 14 times [2023-08-30 20:37:57,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:37:57,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794317812] [2023-08-30 20:37:57,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:37:57,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:37:57,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:37:57,873 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:37:57,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:37:57,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794317812] [2023-08-30 20:37:57,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794317812] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:37:57,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108619842] [2023-08-30 20:37:57,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:37:57,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:37:57,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:37:57,874 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:37:57,877 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-08-30 20:37:58,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:37:58,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:37:58,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:37:58,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:37:58,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:37:58,124 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:37:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:37:58,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108619842] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:37:58,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:37:58,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-08-30 20:37:58,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376789753] [2023-08-30 20:37:58,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:37:58,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 20:37:58,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:37:58,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 20:37:58,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2023-08-30 20:37:58,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:37:58,474 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1070 transitions, 27298 flow. Second operand has 18 states, 18 states have (on average 110.22222222222223) internal successors, (1984), 18 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:37:58,474 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:37:58,474 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:37:58,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:38:02,169 INFO L130 PetriNetUnfolder]: 6718/10409 cut-off events. [2023-08-30 20:38:02,169 INFO L131 PetriNetUnfolder]: For 466496/466715 co-relation queries the response was YES. [2023-08-30 20:38:02,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 137484 conditions, 10409 events. 6718/10409 cut-off events. For 466496/466715 co-relation queries the response was YES. Maximal size of possible extension queue 629. Compared 64191 event pairs, 1319 based on Foata normal form. 165/10548 useless extension candidates. Maximal degree in co-relation 137347. Up to 7047 conditions per place. [2023-08-30 20:38:02,313 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 847 selfloop transitions, 301 changer transitions 0/1178 dead transitions. [2023-08-30 20:38:02,313 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 1178 transitions, 31598 flow [2023-08-30 20:38:02,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:38:02,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:38:02,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1040 transitions. [2023-08-30 20:38:02,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4311774461028192 [2023-08-30 20:38:02,314 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1040 transitions. [2023-08-30 20:38:02,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1040 transitions. [2023-08-30 20:38:02,315 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:38:02,315 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1040 transitions. [2023-08-30 20:38:02,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.55555555555556) internal successors, (1040), 9 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:02,316 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:02,317 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:02,317 INFO L175 Difference]: Start difference. First operand has 336 places, 1070 transitions, 27298 flow. Second operand 9 states and 1040 transitions. [2023-08-30 20:38:02,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 1178 transitions, 31598 flow [2023-08-30 20:38:04,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 1178 transitions, 30561 flow, removed 306 selfloop flow, removed 11 redundant places. [2023-08-30 20:38:04,313 INFO L231 Difference]: Finished difference. Result has 330 places, 1060 transitions, 26868 flow [2023-08-30 20:38:04,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26168, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1057, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=298, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=756, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=26868, PETRI_PLACES=330, PETRI_TRANSITIONS=1060} [2023-08-30 20:38:04,315 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 300 predicate places. [2023-08-30 20:38:04,315 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 1060 transitions, 26868 flow [2023-08-30 20:38:04,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 110.22222222222223) internal successors, (1984), 18 states have internal predecessors, (1984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:04,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:38:04,316 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:38:04,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-08-30 20:38:04,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:04,521 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:38:04,521 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:38:04,521 INFO L85 PathProgramCache]: Analyzing trace with hash 904941842, now seen corresponding path program 21 times [2023-08-30 20:38:04,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:38:04,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462707737] [2023-08-30 20:38:04,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:38:04,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:38:04,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:38:04,633 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:04,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:38:04,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462707737] [2023-08-30 20:38:04,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462707737] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:38:04,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334332122] [2023-08-30 20:38:04,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:38:04,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:04,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:38:04,637 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:38:04,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-08-30 20:38:04,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:38:04,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:38:04,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:38:04,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:38:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:04,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:38:05,013 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:05,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334332122] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:38:05,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:38:05,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-30 20:38:05,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267080359] [2023-08-30 20:38:05,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:38:05,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:38:05,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:38:05,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:38:05,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:38:05,326 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:38:05,327 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 1060 transitions, 26868 flow. Second operand has 19 states, 19 states have (on average 110.10526315789474) internal successors, (2092), 19 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:05,327 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:38:05,327 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:38:05,327 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:38:08,885 INFO L130 PetriNetUnfolder]: 6511/10025 cut-off events. [2023-08-30 20:38:08,886 INFO L131 PetriNetUnfolder]: For 430484/430645 co-relation queries the response was YES. [2023-08-30 20:38:08,974 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130029 conditions, 10025 events. 6511/10025 cut-off events. For 430484/430645 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 60564 event pairs, 730 based on Foata normal form. 236/10243 useless extension candidates. Maximal degree in co-relation 129895. Up to 3621 conditions per place. [2023-08-30 20:38:09,029 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 709 selfloop transitions, 600 changer transitions 0/1339 dead transitions. [2023-08-30 20:38:09,029 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 1339 transitions, 34387 flow [2023-08-30 20:38:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-30 20:38:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-30 20:38:09,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1518 transitions. [2023-08-30 20:38:09,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357060849598163 [2023-08-30 20:38:09,031 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1518 transitions. [2023-08-30 20:38:09,031 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1518 transitions. [2023-08-30 20:38:09,031 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:38:09,031 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1518 transitions. [2023-08-30 20:38:09,032 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 116.76923076923077) internal successors, (1518), 13 states have internal predecessors, (1518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:09,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:09,034 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 268.0) internal successors, (3752), 14 states have internal predecessors, (3752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:09,034 INFO L175 Difference]: Start difference. First operand has 330 places, 1060 transitions, 26868 flow. Second operand 13 states and 1518 transitions. [2023-08-30 20:38:09,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 1339 transitions, 34387 flow [2023-08-30 20:38:11,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 334 places, 1339 transitions, 33772 flow, removed 12 selfloop flow, removed 8 redundant places. [2023-08-30 20:38:11,119 INFO L231 Difference]: Finished difference. Result has 336 places, 1091 transitions, 28379 flow [2023-08-30 20:38:11,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=26163, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1055, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=564, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=28379, PETRI_PLACES=336, PETRI_TRANSITIONS=1091} [2023-08-30 20:38:11,121 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2023-08-30 20:38:11,121 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 1091 transitions, 28379 flow [2023-08-30 20:38:11,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 110.10526315789474) internal successors, (2092), 19 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:11,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:38:11,121 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:38:11,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-08-30 20:38:11,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:11,328 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:38:11,328 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:38:11,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1559549994, now seen corresponding path program 15 times [2023-08-30 20:38:11,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:38:11,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954995426] [2023-08-30 20:38:11,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:38:11,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:38:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:38:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:38:11,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:38:11,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954995426] [2023-08-30 20:38:11,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954995426] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:38:11,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820783231] [2023-08-30 20:38:11,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:38:11,416 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:11,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:38:11,417 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:38:11,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-08-30 20:38:11,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:38:11,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:38:11,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:38:11,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:38:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:38:11,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:38:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:38:11,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820783231] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:38:11,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:38:11,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-30 20:38:11,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794471719] [2023-08-30 20:38:11,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:38:11,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:38:11,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:38:11,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:38:11,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:38:12,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:38:12,133 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 1091 transitions, 28379 flow. Second operand has 19 states, 19 states have (on average 110.05263157894737) internal successors, (2091), 19 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:12,133 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:38:12,133 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:38:12,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:38:15,735 INFO L130 PetriNetUnfolder]: 6464/9925 cut-off events. [2023-08-30 20:38:15,735 INFO L131 PetriNetUnfolder]: For 441978/442153 co-relation queries the response was YES. [2023-08-30 20:38:15,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130499 conditions, 9925 events. 6464/9925 cut-off events. For 441978/442153 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 59619 event pairs, 1268 based on Foata normal form. 117/10018 useless extension candidates. Maximal degree in co-relation 130364. Up to 6748 conditions per place. [2023-08-30 20:38:15,872 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 859 selfloop transitions, 312 changer transitions 0/1201 dead transitions. [2023-08-30 20:38:15,873 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 1201 transitions, 32671 flow [2023-08-30 20:38:15,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:38:15,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:38:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1041 transitions. [2023-08-30 20:38:15,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43159203980099503 [2023-08-30 20:38:15,874 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1041 transitions. [2023-08-30 20:38:15,874 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1041 transitions. [2023-08-30 20:38:15,874 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:38:15,874 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1041 transitions. [2023-08-30 20:38:15,875 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.66666666666667) internal successors, (1041), 9 states have internal predecessors, (1041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:15,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:15,876 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:15,876 INFO L175 Difference]: Start difference. First operand has 336 places, 1091 transitions, 28379 flow. Second operand 9 states and 1041 transitions. [2023-08-30 20:38:15,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 1201 transitions, 32671 flow [2023-08-30 20:38:17,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 1201 transitions, 32221 flow, removed 58 selfloop flow, removed 6 redundant places. [2023-08-30 20:38:17,719 INFO L231 Difference]: Finished difference. Result has 339 places, 1096 transitions, 28667 flow [2023-08-30 20:38:17,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=27864, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1089, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=305, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=777, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=28667, PETRI_PLACES=339, PETRI_TRANSITIONS=1096} [2023-08-30 20:38:17,720 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 309 predicate places. [2023-08-30 20:38:17,720 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 1096 transitions, 28667 flow [2023-08-30 20:38:17,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 110.05263157894737) internal successors, (2091), 19 states have internal predecessors, (2091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:17,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:38:17,721 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:38:17,726 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-08-30 20:38:17,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-08-30 20:38:17,921 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:38:17,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:38:17,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1382664562, now seen corresponding path program 16 times [2023-08-30 20:38:17,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:38:17,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865032328] [2023-08-30 20:38:17,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:38:17,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:38:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:38:18,038 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:18,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:38:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865032328] [2023-08-30 20:38:18,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865032328] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:38:18,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107533865] [2023-08-30 20:38:18,038 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:38:18,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:18,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:38:18,041 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:38:18,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-08-30 20:38:18,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:38:18,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:38:18,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:38:18,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:38:18,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:18,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:38:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:18,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107533865] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:38:18,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:38:18,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-30 20:38:18,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550311261] [2023-08-30 20:38:18,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:38:18,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:38:18,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:38:18,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:38:18,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:38:18,657 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:38:18,658 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 1096 transitions, 28667 flow. Second operand has 19 states, 19 states have (on average 110.15789473684211) internal successors, (2093), 19 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:18,658 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:38:18,658 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:38:18,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:38:22,354 INFO L130 PetriNetUnfolder]: 6431/9893 cut-off events. [2023-08-30 20:38:22,354 INFO L131 PetriNetUnfolder]: For 435743/435903 co-relation queries the response was YES. [2023-08-30 20:38:22,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130085 conditions, 9893 events. 6431/9893 cut-off events. For 435743/435903 co-relation queries the response was YES. Maximal size of possible extension queue 598. Compared 59627 event pairs, 715 based on Foata normal form. 125/10002 useless extension candidates. Maximal degree in co-relation 129949. Up to 3662 conditions per place. [2023-08-30 20:38:22,493 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 877 selfloop transitions, 423 changer transitions 0/1330 dead transitions. [2023-08-30 20:38:22,493 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 1330 transitions, 35640 flow [2023-08-30 20:38:22,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 20:38:22,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 20:38:22,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 1274 transitions. [2023-08-30 20:38:22,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432157394843962 [2023-08-30 20:38:22,494 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 1274 transitions. [2023-08-30 20:38:22,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 1274 transitions. [2023-08-30 20:38:22,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:38:22,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 1274 transitions. [2023-08-30 20:38:22,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 115.81818181818181) internal successors, (1274), 11 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:22,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:22,497 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 268.0) internal successors, (3216), 12 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:22,497 INFO L175 Difference]: Start difference. First operand has 339 places, 1096 transitions, 28667 flow. Second operand 11 states and 1274 transitions. [2023-08-30 20:38:22,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 1330 transitions, 35640 flow [2023-08-30 20:38:24,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 1330 transitions, 35262 flow, removed 3 selfloop flow, removed 6 redundant places. [2023-08-30 20:38:24,411 INFO L231 Difference]: Finished difference. Result has 344 places, 1107 transitions, 29542 flow [2023-08-30 20:38:24,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=28265, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1094, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=671, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=29542, PETRI_PLACES=344, PETRI_TRANSITIONS=1107} [2023-08-30 20:38:24,413 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 314 predicate places. [2023-08-30 20:38:24,413 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 1107 transitions, 29542 flow [2023-08-30 20:38:24,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 110.15789473684211) internal successors, (2093), 19 states have internal predecessors, (2093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:24,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:38:24,414 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:38:24,419 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-08-30 20:38:24,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-08-30 20:38:24,619 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:38:24,620 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:38:24,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1836836600, now seen corresponding path program 22 times [2023-08-30 20:38:24,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:38:24,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148625991] [2023-08-30 20:38:24,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:38:24,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:38:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:38:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:38:24,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:38:24,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148625991] [2023-08-30 20:38:24,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148625991] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:38:24,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98046159] [2023-08-30 20:38:24,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:38:24,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:24,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:38:24,817 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:38:24,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-08-30 20:38:25,016 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:38:25,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:38:25,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:38:25,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:38:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:38:25,194 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:38:25,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:38:25,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98046159] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:38:25,336 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:38:25,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2023-08-30 20:38:25,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615500165] [2023-08-30 20:38:25,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:38:25,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 20:38:25,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:38:25,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 20:38:25,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2023-08-30 20:38:25,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:38:25,690 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 1107 transitions, 29542 flow. Second operand has 20 states, 20 states have (on average 109.9) internal successors, (2198), 20 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:25,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:38:25,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:38:25,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:38:29,240 INFO L130 PetriNetUnfolder]: 6301/9670 cut-off events. [2023-08-30 20:38:29,240 INFO L131 PetriNetUnfolder]: For 447332/447478 co-relation queries the response was YES. [2023-08-30 20:38:29,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129054 conditions, 9670 events. 6301/9670 cut-off events. For 447332/447478 co-relation queries the response was YES. Maximal size of possible extension queue 589. Compared 57829 event pairs, 1144 based on Foata normal form. 180/9824 useless extension candidates. Maximal degree in co-relation 128917. Up to 6033 conditions per place. [2023-08-30 20:38:29,392 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 899 selfloop transitions, 452 changer transitions 0/1381 dead transitions. [2023-08-30 20:38:29,393 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1381 transitions, 36853 flow [2023-08-30 20:38:29,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-08-30 20:38:29,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-08-30 20:38:29,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1624 transitions. [2023-08-30 20:38:29,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43283582089552236 [2023-08-30 20:38:29,394 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1624 transitions. [2023-08-30 20:38:29,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1624 transitions. [2023-08-30 20:38:29,394 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:38:29,394 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1624 transitions. [2023-08-30 20:38:29,395 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 116.0) internal successors, (1624), 14 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:29,397 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:29,397 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 268.0) internal successors, (4020), 15 states have internal predecessors, (4020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:29,397 INFO L175 Difference]: Start difference. First operand has 344 places, 1107 transitions, 29542 flow. Second operand 14 states and 1624 transitions. [2023-08-30 20:38:29,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1381 transitions, 36853 flow [2023-08-30 20:38:31,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 1381 transitions, 36633 flow, removed 14 selfloop flow, removed 6 redundant places. [2023-08-30 20:38:31,452 INFO L231 Difference]: Finished difference. Result has 353 places, 1122 transitions, 30770 flow [2023-08-30 20:38:31,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=29213, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=432, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=667, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=30770, PETRI_PLACES=353, PETRI_TRANSITIONS=1122} [2023-08-30 20:38:31,453 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 323 predicate places. [2023-08-30 20:38:31,453 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 1122 transitions, 30770 flow [2023-08-30 20:38:31,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 109.9) internal successors, (2198), 20 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:31,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:38:31,454 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:38:31,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2023-08-30 20:38:31,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:31,654 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:38:31,655 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:38:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1350429608, now seen corresponding path program 17 times [2023-08-30 20:38:31,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:38:31,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899715038] [2023-08-30 20:38:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:38:31,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:38:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:38:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:31,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:38:31,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899715038] [2023-08-30 20:38:31,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899715038] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:38:31,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157066308] [2023-08-30 20:38:31,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:38:31,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:31,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:38:31,755 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:38:31,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-08-30 20:38:31,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:38:31,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:38:31,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:38:31,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:38:32,040 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:38:32,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:38:32,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:38:32,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157066308] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:38:32,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:38:32,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-08-30 20:38:32,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617387085] [2023-08-30 20:38:32,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:38:32,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:38:32,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:38:32,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:38:32,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:38:32,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-08-30 20:38:32,487 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 1122 transitions, 30770 flow. Second operand has 19 states, 19 states have (on average 106.26315789473684) internal successors, (2019), 19 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:32,487 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:38:32,487 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-08-30 20:38:32,487 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:38:37,280 INFO L130 PetriNetUnfolder]: 6431/9803 cut-off events. [2023-08-30 20:38:37,280 INFO L131 PetriNetUnfolder]: For 449673/449673 co-relation queries the response was YES. [2023-08-30 20:38:37,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131794 conditions, 9803 events. 6431/9803 cut-off events. For 449673/449673 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 57548 event pairs, 341 based on Foata normal form. 36/9839 useless extension candidates. Maximal degree in co-relation 131655. Up to 3560 conditions per place. [2023-08-30 20:38:37,427 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 893 selfloop transitions, 779 changer transitions 0/1672 dead transitions. [2023-08-30 20:38:37,427 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 1672 transitions, 46084 flow [2023-08-30 20:38:37,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-08-30 20:38:37,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2023-08-30 20:38:37,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 4771 transitions. [2023-08-30 20:38:37,431 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41400555362721275 [2023-08-30 20:38:37,431 INFO L72 ComplementDD]: Start complementDD. Operand 43 states and 4771 transitions. [2023-08-30 20:38:37,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 43 states and 4771 transitions. [2023-08-30 20:38:37,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:38:37,431 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 43 states and 4771 transitions. [2023-08-30 20:38:37,434 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 44 states, 43 states have (on average 110.95348837209302) internal successors, (4771), 43 states have internal predecessors, (4771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:37,438 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 44 states, 44 states have (on average 268.0) internal successors, (11792), 44 states have internal predecessors, (11792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:37,439 INFO L81 ComplementDD]: Finished complementDD. Result has 44 states, 44 states have (on average 268.0) internal successors, (11792), 44 states have internal predecessors, (11792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:37,439 INFO L175 Difference]: Start difference. First operand has 353 places, 1122 transitions, 30770 flow. Second operand 43 states and 4771 transitions. [2023-08-30 20:38:37,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 1672 transitions, 46084 flow [2023-08-30 20:38:39,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 1672 transitions, 44994 flow, removed 50 selfloop flow, removed 11 redundant places. [2023-08-30 20:38:39,543 INFO L231 Difference]: Finished difference. Result has 383 places, 1238 transitions, 34161 flow [2023-08-30 20:38:39,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=29707, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=660, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=43, PETRI_FLOW=34161, PETRI_PLACES=383, PETRI_TRANSITIONS=1238} [2023-08-30 20:38:39,544 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 353 predicate places. [2023-08-30 20:38:39,544 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 1238 transitions, 34161 flow [2023-08-30 20:38:39,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.26315789473684) internal successors, (2019), 19 states have internal predecessors, (2019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:39,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:38:39,545 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:38:39,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-08-30 20:38:39,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-08-30 20:38:39,745 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:38:39,745 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:38:39,745 INFO L85 PathProgramCache]: Analyzing trace with hash 364382334, now seen corresponding path program 23 times [2023-08-30 20:38:39,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:38:39,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192117430] [2023-08-30 20:38:39,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:38:39,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:38:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:38:39,829 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:38:39,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:38:39,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192117430] [2023-08-30 20:38:39,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192117430] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:38:39,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706922547] [2023-08-30 20:38:39,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:38:39,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:39,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:38:39,831 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:38:39,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-08-30 20:38:39,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:38:39,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:38:39,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 8 conjunts are in the unsatisfiable core [2023-08-30 20:38:39,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:38:40,073 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:38:40,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:38:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:38:40,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706922547] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:38:40,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:38:40,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 16 [2023-08-30 20:38:40,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810827935] [2023-08-30 20:38:40,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:38:40,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-30 20:38:40,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:38:40,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-30 20:38:40,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-08-30 20:38:40,396 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 268 [2023-08-30 20:38:40,397 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 1238 transitions, 34161 flow. Second operand has 16 states, 16 states have (on average 106.8125) internal successors, (1709), 16 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:40,397 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:38:40,397 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 268 [2023-08-30 20:38:40,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:38:44,468 INFO L130 PetriNetUnfolder]: 6380/9705 cut-off events. [2023-08-30 20:38:44,468 INFO L131 PetriNetUnfolder]: For 456924/456924 co-relation queries the response was YES. [2023-08-30 20:38:44,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132151 conditions, 9705 events. 6380/9705 cut-off events. For 456924/456924 co-relation queries the response was YES. Maximal size of possible extension queue 576. Compared 56613 event pairs, 681 based on Foata normal form. 37/9742 useless extension candidates. Maximal degree in co-relation 132012. Up to 5113 conditions per place. [2023-08-30 20:38:44,617 INFO L137 encePairwiseOnDemand]: 258/268 looper letters, 945 selfloop transitions, 555 changer transitions 0/1500 dead transitions. [2023-08-30 20:38:44,617 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 1500 transitions, 42472 flow [2023-08-30 20:38:44,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-08-30 20:38:44,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-08-30 20:38:44,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 2100 transitions. [2023-08-30 20:38:44,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4124116260801257 [2023-08-30 20:38:44,619 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 2100 transitions. [2023-08-30 20:38:44,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 2100 transitions. [2023-08-30 20:38:44,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:38:44,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 2100 transitions. [2023-08-30 20:38:44,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 110.52631578947368) internal successors, (2100), 19 states have internal predecessors, (2100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:44,623 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:44,624 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 268.0) internal successors, (5360), 20 states have internal predecessors, (5360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:44,624 INFO L175 Difference]: Start difference. First operand has 383 places, 1238 transitions, 34161 flow. Second operand 19 states and 2100 transitions. [2023-08-30 20:38:44,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 1500 transitions, 42472 flow [2023-08-30 20:38:46,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 1500 transitions, 40600 flow, removed 343 selfloop flow, removed 16 redundant places. [2023-08-30 20:38:46,827 INFO L231 Difference]: Finished difference. Result has 388 places, 1274 transitions, 34512 flow [2023-08-30 20:38:46,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=32316, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=515, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=702, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=34512, PETRI_PLACES=388, PETRI_TRANSITIONS=1274} [2023-08-30 20:38:46,828 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 358 predicate places. [2023-08-30 20:38:46,828 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 1274 transitions, 34512 flow [2023-08-30 20:38:46,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 106.8125) internal successors, (1709), 16 states have internal predecessors, (1709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:46,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:38:46,829 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:38:46,835 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2023-08-30 20:38:47,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-08-30 20:38:47,035 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:38:47,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:38:47,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1809548896, now seen corresponding path program 18 times [2023-08-30 20:38:47,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:38:47,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572793976] [2023-08-30 20:38:47,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:38:47,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:38:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:38:47,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:47,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:38:47,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572793976] [2023-08-30 20:38:47,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572793976] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:38:47,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583184152] [2023-08-30 20:38:47,128 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:38:47,128 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:47,128 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:38:47,129 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:38:47,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-08-30 20:38:47,296 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:38:47,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:38:47,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 10 conjunts are in the unsatisfiable core [2023-08-30 20:38:47,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:38:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:47,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:38:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:38:47,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583184152] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:38:47,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:38:47,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2023-08-30 20:38:47,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026645254] [2023-08-30 20:38:47,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:38:47,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 20:38:47,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:38:47,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 20:38:47,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2023-08-30 20:38:47,822 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 268 [2023-08-30 20:38:47,823 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 1274 transitions, 34512 flow. Second operand has 19 states, 19 states have (on average 110.10526315789474) internal successors, (2092), 19 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:47,823 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:38:47,823 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 268 [2023-08-30 20:38:47,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:38:51,509 INFO L130 PetriNetUnfolder]: 6220/9478 cut-off events. [2023-08-30 20:38:51,509 INFO L131 PetriNetUnfolder]: For 444106/444153 co-relation queries the response was YES. [2023-08-30 20:38:51,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128290 conditions, 9478 events. 6220/9478 cut-off events. For 444106/444153 co-relation queries the response was YES. Maximal size of possible extension queue 574. Compared 55530 event pairs, 1173 based on Foata normal form. 62/9522 useless extension candidates. Maximal degree in co-relation 128151. Up to 6134 conditions per place. [2023-08-30 20:38:51,652 INFO L137 encePairwiseOnDemand]: 260/268 looper letters, 970 selfloop transitions, 374 changer transitions 0/1394 dead transitions. [2023-08-30 20:38:51,652 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1394 transitions, 38987 flow [2023-08-30 20:38:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 20:38:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 20:38:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 1037 transitions. [2023-08-30 20:38:51,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4299336650082919 [2023-08-30 20:38:51,654 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 1037 transitions. [2023-08-30 20:38:51,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 1037 transitions. [2023-08-30 20:38:51,654 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:38:51,654 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 1037 transitions. [2023-08-30 20:38:51,655 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 115.22222222222223) internal successors, (1037), 9 states have internal predecessors, (1037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:51,655 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:51,656 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 268.0) internal successors, (2680), 10 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:51,656 INFO L175 Difference]: Start difference. First operand has 388 places, 1274 transitions, 34512 flow. Second operand 9 states and 1037 transitions. [2023-08-30 20:38:51,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1394 transitions, 38987 flow [2023-08-30 20:38:53,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1394 transitions, 37796 flow, removed 7 selfloop flow, removed 10 redundant places. [2023-08-30 20:38:53,821 INFO L231 Difference]: Finished difference. Result has 387 places, 1278 transitions, 34122 flow [2023-08-30 20:38:53,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=33200, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=896, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=34122, PETRI_PLACES=387, PETRI_TRANSITIONS=1278} [2023-08-30 20:38:53,822 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 357 predicate places. [2023-08-30 20:38:53,822 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1278 transitions, 34122 flow [2023-08-30 20:38:53,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 110.10526315789474) internal successors, (2092), 19 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:53,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:38:53,822 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:38:53,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-08-30 20:38:54,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:54,023 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:38:54,023 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:38:54,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1497725513, now seen corresponding path program 7 times [2023-08-30 20:38:54,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:38:54,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466831179] [2023-08-30 20:38:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:38:54,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:38:54,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:38:54,812 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:38:54,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:38:54,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466831179] [2023-08-30 20:38:54,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466831179] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:38:54,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536595109] [2023-08-30 20:38:54,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:38:54,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:38:54,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:38:54,814 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:38:54,815 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-08-30 20:38:54,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:38:54,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 87 conjunts are in the unsatisfiable core [2023-08-30 20:38:54,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:38:55,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:38:55,305 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 20 treesize of output 20 [2023-08-30 20:38:55,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:38:55,376 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 20 treesize of output 20 [2023-08-30 20:38:55,568 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:38:55,571 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:38:55,571 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2023-08-30 20:38:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:38:55,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:38:55,775 WARN L839 $PredicateComparison]: unable to prove that (forall ((|v_thread3Thread1of1ForFork0_~i~2#1_177| Int) (v_ArrVal_2606 (Array Int Int))) (or (<= c_~N~0 |v_thread3Thread1of1ForFork0_~i~2#1_177|) (= c_~res1~0 (let ((.cse0 (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2606) c_~A~0.base))) (+ (select .cse0 c_~A~0.offset) c_~res2~0 (select .cse0 (+ c_~A~0.offset (* |v_thread3Thread1of1ForFork0_~i~2#1_177| 4)))))) (< |v_thread3Thread1of1ForFork0_~i~2#1_177| 1))) is different from false [2023-08-30 20:38:55,797 WARN L839 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2605 (Array Int Int)) (|v_thread3Thread1of1ForFork0_~i~2#1_177| Int) (v_ArrVal_2606 (Array Int Int))) (or (<= c_~N~0 |v_thread3Thread1of1ForFork0_~i~2#1_177|) (= c_~res1~0 (let ((.cse0 (select (store (store |c_#memory_int| |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_2605) |c_ULTIMATE.start_main_~#t3~0#1.base| v_ArrVal_2606) c_~A~0.base))) (+ c_~res2~0 (select .cse0 (+ c_~A~0.offset (* |v_thread3Thread1of1ForFork0_~i~2#1_177| 4))) (select .cse0 c_~A~0.offset)))) (< |v_thread3Thread1of1ForFork0_~i~2#1_177| 1))) is different from false [2023-08-30 20:38:55,939 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 20:38:55,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 350 treesize of output 226 [2023-08-30 20:38:55,947 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:38:55,948 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 33 [2023-08-30 20:38:55,957 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-08-30 20:38:55,958 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 32 [2023-08-30 20:38:56,468 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:38:56,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536595109] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:38:56,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:38:56,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 36 [2023-08-30 20:38:56,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929399746] [2023-08-30 20:38:56,468 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:38:56,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-08-30 20:38:56,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:38:56,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-08-30 20:38:56,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1117, Unknown=4, NotChecked=138, Total=1406 [2023-08-30 20:38:56,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 268 [2023-08-30 20:38:56,744 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1278 transitions, 34122 flow. Second operand has 38 states, 38 states have (on average 73.57894736842105) internal successors, (2796), 38 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:38:56,745 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:38:56,745 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 268 [2023-08-30 20:38:56,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:39:04,131 INFO L130 PetriNetUnfolder]: 8847/13456 cut-off events. [2023-08-30 20:39:04,132 INFO L131 PetriNetUnfolder]: For 657936/657936 co-relation queries the response was YES. [2023-08-30 20:39:04,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 185761 conditions, 13456 events. 8847/13456 cut-off events. For 657936/657936 co-relation queries the response was YES. Maximal size of possible extension queue 787. Compared 83123 event pairs, 579 based on Foata normal form. 6/13462 useless extension candidates. Maximal degree in co-relation 185621. Up to 8817 conditions per place. [2023-08-30 20:39:04,340 INFO L137 encePairwiseOnDemand]: 255/268 looper letters, 1147 selfloop transitions, 915 changer transitions 4/2066 dead transitions. [2023-08-30 20:39:04,340 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 2066 transitions, 60985 flow [2023-08-30 20:39:04,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-08-30 20:39:04,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-08-30 20:39:04,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2127 transitions. [2023-08-30 20:39:04,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.30525258323765786 [2023-08-30 20:39:04,342 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2127 transitions. [2023-08-30 20:39:04,342 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2127 transitions. [2023-08-30 20:39:04,343 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:39:04,343 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2127 transitions. [2023-08-30 20:39:04,344 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 81.8076923076923) internal successors, (2127), 26 states have internal predecessors, (2127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:04,347 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 268.0) internal successors, (7236), 27 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:04,347 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 268.0) internal successors, (7236), 27 states have internal predecessors, (7236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:04,347 INFO L175 Difference]: Start difference. First operand has 387 places, 1278 transitions, 34122 flow. Second operand 26 states and 2127 transitions. [2023-08-30 20:39:04,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 2066 transitions, 60985 flow [2023-08-30 20:39:08,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 2066 transitions, 59509 flow, removed 0 selfloop flow, removed 8 redundant places. [2023-08-30 20:39:08,733 INFO L231 Difference]: Finished difference. Result has 419 places, 1795 transitions, 54360 flow [2023-08-30 20:39:08,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=33296, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=660, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=54360, PETRI_PLACES=419, PETRI_TRANSITIONS=1795} [2023-08-30 20:39:08,734 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 389 predicate places. [2023-08-30 20:39:08,734 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 1795 transitions, 54360 flow [2023-08-30 20:39:08,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 73.57894736842105) internal successors, (2796), 38 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:08,735 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:39:08,735 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:39:08,740 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-08-30 20:39:08,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:39:08,935 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:39:08,936 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:39:08,936 INFO L85 PathProgramCache]: Analyzing trace with hash 117573641, now seen corresponding path program 8 times [2023-08-30 20:39:08,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:39:08,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539614347] [2023-08-30 20:39:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:39:08,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:39:08,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:39:09,625 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:39:09,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:39:09,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539614347] [2023-08-30 20:39:09,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539614347] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:39:09,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202902591] [2023-08-30 20:39:09,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:39:09,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:39:09,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:39:09,627 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:39:09,629 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-08-30 20:39:09,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:39:09,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:39:09,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 83 conjunts are in the unsatisfiable core [2023-08-30 20:39:09,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:39:10,302 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:39:10,303 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 27 [2023-08-30 20:39:10,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:39:10,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:39:10,750 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:39:10,750 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 54 [2023-08-30 20:39:11,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:39:11,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202902591] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:39:11,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:39:11,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2023-08-30 20:39:11,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977466103] [2023-08-30 20:39:11,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:39:11,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-08-30 20:39:11,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:39:11,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-08-30 20:39:11,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2023-08-30 20:39:13,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 268 [2023-08-30 20:39:13,633 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 1795 transitions, 54360 flow. Second operand has 33 states, 33 states have (on average 98.24242424242425) internal successors, (3242), 33 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:13,633 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:39:13,633 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 268 [2023-08-30 20:39:13,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:39:23,567 INFO L130 PetriNetUnfolder]: 11183/17148 cut-off events. [2023-08-30 20:39:23,567 INFO L131 PetriNetUnfolder]: For 965605/965605 co-relation queries the response was YES. [2023-08-30 20:39:23,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245289 conditions, 17148 events. 11183/17148 cut-off events. For 965605/965605 co-relation queries the response was YES. Maximal size of possible extension queue 965. Compared 112137 event pairs, 1318 based on Foata normal form. 8/17156 useless extension candidates. Maximal degree in co-relation 245135. Up to 13532 conditions per place. [2023-08-30 20:39:23,860 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1638 selfloop transitions, 736 changer transitions 4/2378 dead transitions. [2023-08-30 20:39:23,860 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 2378 transitions, 74295 flow [2023-08-30 20:39:23,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-08-30 20:39:23,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2023-08-30 20:39:23,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2854 transitions. [2023-08-30 20:39:23,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39441680486456604 [2023-08-30 20:39:23,862 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2854 transitions. [2023-08-30 20:39:23,862 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2854 transitions. [2023-08-30 20:39:23,862 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:39:23,862 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2854 transitions. [2023-08-30 20:39:23,864 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 105.70370370370371) internal successors, (2854), 27 states have internal predecessors, (2854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:23,867 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 268.0) internal successors, (7504), 28 states have internal predecessors, (7504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:23,867 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 268.0) internal successors, (7504), 28 states have internal predecessors, (7504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:23,867 INFO L175 Difference]: Start difference. First operand has 419 places, 1795 transitions, 54360 flow. Second operand 27 states and 2854 transitions. [2023-08-30 20:39:23,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 2378 transitions, 74295 flow [2023-08-30 20:39:32,338 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 2378 transitions, 69565 flow, removed 2152 selfloop flow, removed 3 redundant places. [2023-08-30 20:39:32,388 INFO L231 Difference]: Finished difference. Result has 460 places, 2138 transitions, 63155 flow [2023-08-30 20:39:32,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=51636, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1795, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=63155, PETRI_PLACES=460, PETRI_TRANSITIONS=2138} [2023-08-30 20:39:32,390 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 430 predicate places. [2023-08-30 20:39:32,390 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 2138 transitions, 63155 flow [2023-08-30 20:39:32,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 98.24242424242425) internal successors, (3242), 33 states have internal predecessors, (3242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:32,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:39:32,391 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:39:32,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-08-30 20:39:32,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-08-30 20:39:32,596 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:39:32,596 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:39:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1910092979, now seen corresponding path program 9 times [2023-08-30 20:39:32,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:39:32,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602467766] [2023-08-30 20:39:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:39:32,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:39:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:39:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:39:33,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:39:33,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602467766] [2023-08-30 20:39:33,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602467766] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:39:33,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712795935] [2023-08-30 20:39:33,277 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 20:39:33,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:39:33,277 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:39:33,278 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:39:33,279 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-08-30 20:39:33,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 20:39:33,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:39:33,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2023-08-30 20:39:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:39:33,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:39:33,743 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:39:33,743 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 19 [2023-08-30 20:39:33,781 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:39:33,781 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:39:34,071 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 20:39:34,071 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 46 [2023-08-30 20:39:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:39:34,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712795935] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:39:34,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:39:34,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 28 [2023-08-30 20:39:34,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513309892] [2023-08-30 20:39:34,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:39:34,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:39:34,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:39:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:39:34,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=758, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:39:35,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 268 [2023-08-30 20:39:35,880 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 2138 transitions, 63155 flow. Second operand has 30 states, 30 states have (on average 100.23333333333333) internal successors, (3007), 30 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:35,880 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:39:35,880 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 268 [2023-08-30 20:39:35,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:39:49,184 INFO L130 PetriNetUnfolder]: 12874/20172 cut-off events. [2023-08-30 20:39:49,184 INFO L131 PetriNetUnfolder]: For 1054627/1054627 co-relation queries the response was YES. [2023-08-30 20:39:49,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 276316 conditions, 20172 events. 12874/20172 cut-off events. For 1054627/1054627 co-relation queries the response was YES. Maximal size of possible extension queue 1053. Compared 140566 event pairs, 883 based on Foata normal form. 4/20176 useless extension candidates. Maximal degree in co-relation 276143. Up to 13677 conditions per place. [2023-08-30 20:39:49,567 INFO L137 encePairwiseOnDemand]: 254/268 looper letters, 1567 selfloop transitions, 1274 changer transitions 2/2843 dead transitions. [2023-08-30 20:39:49,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 2843 transitions, 85423 flow [2023-08-30 20:39:49,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-08-30 20:39:49,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2023-08-30 20:39:49,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3777 transitions. [2023-08-30 20:39:49,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40266524520255864 [2023-08-30 20:39:49,570 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3777 transitions. [2023-08-30 20:39:49,570 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3777 transitions. [2023-08-30 20:39:49,570 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:39:49,570 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3777 transitions. [2023-08-30 20:39:49,573 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 107.91428571428571) internal successors, (3777), 35 states have internal predecessors, (3777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:49,576 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 268.0) internal successors, (9648), 36 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:49,577 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 268.0) internal successors, (9648), 36 states have internal predecessors, (9648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:39:49,577 INFO L175 Difference]: Start difference. First operand has 460 places, 2138 transitions, 63155 flow. Second operand 35 states and 3777 transitions. [2023-08-30 20:39:49,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 2843 transitions, 85423 flow [2023-08-30 20:40:00,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 2843 transitions, 83229 flow, removed 1006 selfloop flow, removed 5 redundant places. [2023-08-30 20:40:00,680 INFO L231 Difference]: Finished difference. Result has 500 places, 2591 transitions, 77231 flow [2023-08-30 20:40:00,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=61434, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=880, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1062, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=77231, PETRI_PLACES=500, PETRI_TRANSITIONS=2591} [2023-08-30 20:40:00,682 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 470 predicate places. [2023-08-30 20:40:00,682 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 2591 transitions, 77231 flow [2023-08-30 20:40:00,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 100.23333333333333) internal successors, (3007), 30 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:40:00,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:40:00,683 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:40:00,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-08-30 20:40:00,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:40:00,883 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:40:00,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:40:00,883 INFO L85 PathProgramCache]: Analyzing trace with hash 60735179, now seen corresponding path program 10 times [2023-08-30 20:40:00,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:40:00,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076938081] [2023-08-30 20:40:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:40:00,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:40:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:40:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:40:01,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:40:01,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076938081] [2023-08-30 20:40:01,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076938081] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:40:01,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94609626] [2023-08-30 20:40:01,558 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 20:40:01,558 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:40:01,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:40:01,559 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:40:01,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-08-30 20:40:01,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 20:40:01,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:40:01,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2023-08-30 20:40:01,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:40:02,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:40:02,098 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:40:02,098 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 19 [2023-08-30 20:40:02,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:40:02,144 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:40:02,437 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 20:40:02,438 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 46 [2023-08-30 20:40:02,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:40:02,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94609626] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:40:02,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:40:02,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 28 [2023-08-30 20:40:02,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270555941] [2023-08-30 20:40:02,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:40:02,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:40:02,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:40:02,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:40:02,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=766, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:40:04,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-08-30 20:40:04,499 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 2591 transitions, 77231 flow. Second operand has 30 states, 30 states have (on average 99.23333333333333) internal successors, (2977), 30 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:40:04,499 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:40:04,499 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-08-30 20:40:04,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:40:23,648 INFO L130 PetriNetUnfolder]: 14019/21993 cut-off events. [2023-08-30 20:40:23,648 INFO L131 PetriNetUnfolder]: For 1190110/1190110 co-relation queries the response was YES. [2023-08-30 20:40:23,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 308442 conditions, 21993 events. 14019/21993 cut-off events. For 1190110/1190110 co-relation queries the response was YES. Maximal size of possible extension queue 1144. Compared 155842 event pairs, 1299 based on Foata normal form. 4/21997 useless extension candidates. Maximal degree in co-relation 308257. Up to 15885 conditions per place. [2023-08-30 20:40:24,052 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1710 selfloop transitions, 1500 changer transitions 2/3212 dead transitions. [2023-08-30 20:40:24,053 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 3212 transitions, 99003 flow [2023-08-30 20:40:24,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-08-30 20:40:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2023-08-30 20:40:24,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 7443 transitions. [2023-08-30 20:40:24,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38572761194029853 [2023-08-30 20:40:24,059 INFO L72 ComplementDD]: Start complementDD. Operand 72 states and 7443 transitions. [2023-08-30 20:40:24,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 72 states and 7443 transitions. [2023-08-30 20:40:24,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:40:24,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 72 states and 7443 transitions. [2023-08-30 20:40:24,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 73 states, 72 states have (on average 103.375) internal successors, (7443), 72 states have internal predecessors, (7443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:40:24,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 73 states, 73 states have (on average 268.0) internal successors, (19564), 73 states have internal predecessors, (19564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:40:24,072 INFO L81 ComplementDD]: Finished complementDD. Result has 73 states, 73 states have (on average 268.0) internal successors, (19564), 73 states have internal predecessors, (19564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:40:24,072 INFO L175 Difference]: Start difference. First operand has 500 places, 2591 transitions, 77231 flow. Second operand 72 states and 7443 transitions. [2023-08-30 20:40:24,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 3212 transitions, 99003 flow [2023-08-30 20:40:38,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 3212 transitions, 95549 flow, removed 1577 selfloop flow, removed 6 redundant places. [2023-08-30 20:40:38,896 INFO L231 Difference]: Finished difference. Result has 586 places, 2959 transitions, 89603 flow [2023-08-30 20:40:38,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=74546, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=72, PETRI_FLOW=89603, PETRI_PLACES=586, PETRI_TRANSITIONS=2959} [2023-08-30 20:40:38,898 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 556 predicate places. [2023-08-30 20:40:38,898 INFO L495 AbstractCegarLoop]: Abstraction has has 586 places, 2959 transitions, 89603 flow [2023-08-30 20:40:38,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 99.23333333333333) internal successors, (2977), 30 states have internal predecessors, (2977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:40:38,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:40:38,899 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:40:38,904 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-08-30 20:40:39,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-08-30 20:40:39,099 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:40:39,099 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:40:39,099 INFO L85 PathProgramCache]: Analyzing trace with hash 263199709, now seen corresponding path program 11 times [2023-08-30 20:40:39,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:40:39,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882222202] [2023-08-30 20:40:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:40:39,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:40:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:40:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:40:39,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:40:39,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882222202] [2023-08-30 20:40:39,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882222202] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:40:39,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412792882] [2023-08-30 20:40:39,661 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 20:40:39,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:40:39,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:40:39,662 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:40:39,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-08-30 20:40:39,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:40:39,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:40:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 80 conjunts are in the unsatisfiable core [2023-08-30 20:40:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:40:40,139 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:40:40,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:40:40,142 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:40:40,142 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 14 [2023-08-30 20:40:40,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:40:40,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:40:40,362 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 20:40:40,362 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 46 [2023-08-30 20:40:40,683 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:40:40,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412792882] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:40:40,683 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:40:40,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 28 [2023-08-30 20:40:40,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222674654] [2023-08-30 20:40:40,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:40:40,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:40:40,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:40:40,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:40:40,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:40:42,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 268 [2023-08-30 20:40:42,159 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 586 places, 2959 transitions, 89603 flow. Second operand has 30 states, 30 states have (on average 98.73333333333333) internal successors, (2962), 30 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:40:42,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:40:42,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 268 [2023-08-30 20:40:42,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:41:02,270 INFO L130 PetriNetUnfolder]: 15727/24855 cut-off events. [2023-08-30 20:41:02,270 INFO L131 PetriNetUnfolder]: For 1346294/1346294 co-relation queries the response was YES. [2023-08-30 20:41:02,629 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350083 conditions, 24855 events. 15727/24855 cut-off events. For 1346294/1346294 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 181351 event pairs, 612 based on Foata normal form. 14/24869 useless extension candidates. Maximal degree in co-relation 349879. Up to 13882 conditions per place. [2023-08-30 20:41:02,762 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1554 selfloop transitions, 2022 changer transitions 4/3580 dead transitions. [2023-08-30 20:41:02,763 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 625 places, 3580 transitions, 112290 flow [2023-08-30 20:41:02,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-08-30 20:41:02,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2023-08-30 20:41:02,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 4252 transitions. [2023-08-30 20:41:02,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3966417910447761 [2023-08-30 20:41:02,766 INFO L72 ComplementDD]: Start complementDD. Operand 40 states and 4252 transitions. [2023-08-30 20:41:02,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 40 states and 4252 transitions. [2023-08-30 20:41:02,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:41:02,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 40 states and 4252 transitions. [2023-08-30 20:41:02,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 41 states, 40 states have (on average 106.3) internal successors, (4252), 40 states have internal predecessors, (4252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:02,773 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 41 states, 41 states have (on average 268.0) internal successors, (10988), 41 states have internal predecessors, (10988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:02,773 INFO L81 ComplementDD]: Finished complementDD. Result has 41 states, 41 states have (on average 268.0) internal successors, (10988), 41 states have internal predecessors, (10988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:02,773 INFO L175 Difference]: Start difference. First operand has 586 places, 2959 transitions, 89603 flow. Second operand 40 states and 4252 transitions. [2023-08-30 20:41:02,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 625 places, 3580 transitions, 112290 flow [2023-08-30 20:41:22,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 607 places, 3580 transitions, 108923 flow, removed 1328 selfloop flow, removed 18 redundant places. [2023-08-30 20:41:22,544 INFO L231 Difference]: Finished difference. Result has 617 places, 3319 transitions, 105045 flow [2023-08-30 20:41:22,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=86331, PETRI_DIFFERENCE_MINUEND_PLACES=568, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2959, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1682, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=105045, PETRI_PLACES=617, PETRI_TRANSITIONS=3319} [2023-08-30 20:41:22,546 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 587 predicate places. [2023-08-30 20:41:22,546 INFO L495 AbstractCegarLoop]: Abstraction has has 617 places, 3319 transitions, 105045 flow [2023-08-30 20:41:22,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 98.73333333333333) internal successors, (2962), 30 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:22,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:41:22,547 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:41:22,552 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-08-30 20:41:22,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2023-08-30 20:41:22,748 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:41:22,748 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:41:22,748 INFO L85 PathProgramCache]: Analyzing trace with hash 757727345, now seen corresponding path program 12 times [2023-08-30 20:41:22,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:41:22,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699405235] [2023-08-30 20:41:22,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:41:22,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:41:22,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:41:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:41:23,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:41:23,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699405235] [2023-08-30 20:41:23,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699405235] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:41:23,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238796141] [2023-08-30 20:41:23,364 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:41:23,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:41:23,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:41:23,365 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:41:23,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-08-30 20:41:23,554 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:41:23,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:41:23,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 78 conjunts are in the unsatisfiable core [2023-08-30 20:41:23,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:41:23,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:41:23,839 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:41:23,839 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 19 [2023-08-30 20:41:23,874 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:41:23,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:41:24,146 INFO L321 Elim1Store]: treesize reduction 8, result has 82.2 percent of original size [2023-08-30 20:41:24,146 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 46 [2023-08-30 20:41:24,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:41:24,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238796141] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:41:24,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:41:24,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 8] total 28 [2023-08-30 20:41:24,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108083179] [2023-08-30 20:41:24,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:41:24,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-08-30 20:41:24,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:41:24,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-08-30 20:41:24,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=764, Unknown=0, NotChecked=0, Total=870 [2023-08-30 20:41:25,792 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 268 [2023-08-30 20:41:25,793 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 617 places, 3319 transitions, 105045 flow. Second operand has 30 states, 30 states have (on average 100.23333333333333) internal successors, (3007), 30 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:25,793 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:41:25,793 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 268 [2023-08-30 20:41:25,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:41:51,800 INFO L130 PetriNetUnfolder]: 16481/26059 cut-off events. [2023-08-30 20:41:51,800 INFO L131 PetriNetUnfolder]: For 1515440/1515440 co-relation queries the response was YES. [2023-08-30 20:41:52,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 382062 conditions, 26059 events. 16481/26059 cut-off events. For 1515440/1515440 co-relation queries the response was YES. Maximal size of possible extension queue 1305. Compared 191159 event pairs, 1211 based on Foata normal form. 8/26067 useless extension candidates. Maximal degree in co-relation 381850. Up to 16908 conditions per place. [2023-08-30 20:41:52,362 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 1860 selfloop transitions, 1938 changer transitions 10/3808 dead transitions. [2023-08-30 20:41:52,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 689 places, 3808 transitions, 122032 flow [2023-08-30 20:41:52,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-08-30 20:41:52,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2023-08-30 20:41:52,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 7713 transitions. [2023-08-30 20:41:52,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942445307708035 [2023-08-30 20:41:52,367 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 7713 transitions. [2023-08-30 20:41:52,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 7713 transitions. [2023-08-30 20:41:52,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:41:52,368 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 7713 transitions. [2023-08-30 20:41:52,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 74 states, 73 states have (on average 105.65753424657534) internal successors, (7713), 73 states have internal predecessors, (7713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:52,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 74 states, 74 states have (on average 268.0) internal successors, (19832), 74 states have internal predecessors, (19832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:52,386 INFO L81 ComplementDD]: Finished complementDD. Result has 74 states, 74 states have (on average 268.0) internal successors, (19832), 74 states have internal predecessors, (19832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:41:52,386 INFO L175 Difference]: Start difference. First operand has 617 places, 3319 transitions, 105045 flow. Second operand 73 states and 7713 transitions. [2023-08-30 20:41:52,386 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 689 places, 3808 transitions, 122032 flow [2023-08-30 20:42:19,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 678 places, 3808 transitions, 118352 flow, removed 1587 selfloop flow, removed 11 redundant places. [2023-08-30 20:42:19,653 INFO L231 Difference]: Finished difference. Result has 691 places, 3484 transitions, 111455 flow [2023-08-30 20:42:19,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=101603, PETRI_DIFFERENCE_MINUEND_PLACES=606, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1790, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=111455, PETRI_PLACES=691, PETRI_TRANSITIONS=3484} [2023-08-30 20:42:19,656 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 661 predicate places. [2023-08-30 20:42:19,656 INFO L495 AbstractCegarLoop]: Abstraction has has 691 places, 3484 transitions, 111455 flow [2023-08-30 20:42:19,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 100.23333333333333) internal successors, (3007), 30 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:19,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:42:19,657 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:42:19,666 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-08-30 20:42:19,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:19,862 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:42:19,862 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:42:19,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1775892861, now seen corresponding path program 19 times [2023-08-30 20:42:19,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:42:19,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642304951] [2023-08-30 20:42:19,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:42:19,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:42:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:42:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:42:21,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:42:21,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642304951] [2023-08-30 20:42:21,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642304951] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:42:21,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452155962] [2023-08-30 20:42:21,155 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 20:42:21,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:42:21,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:42:21,156 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:42:21,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-08-30 20:42:21,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:42:21,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-30 20:42:21,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:42:21,778 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:42:21,779 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:42:21,780 INFO L173 IndexEqualityManager]: detected equality via solver [2023-08-30 20:42:21,783 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:42:21,784 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 17 [2023-08-30 20:42:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:42:21,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:42:22,028 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:42:22,028 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 46 [2023-08-30 20:42:22,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:42:22,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452155962] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:42:22,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:42:22,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11, 9] total 34 [2023-08-30 20:42:22,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514022038] [2023-08-30 20:42:22,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:42:22,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-08-30 20:42:22,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:42:22,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-08-30 20:42:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1151, Unknown=0, NotChecked=0, Total=1260 [2023-08-30 20:42:25,210 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 268 [2023-08-30 20:42:25,211 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 691 places, 3484 transitions, 111455 flow. Second operand has 36 states, 36 states have (on average 91.0) internal successors, (3276), 36 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:25,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:42:25,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 268 [2023-08-30 20:42:25,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:42:53,326 INFO L130 PetriNetUnfolder]: 18654/29636 cut-off events. [2023-08-30 20:42:53,326 INFO L131 PetriNetUnfolder]: For 1828525/1828525 co-relation queries the response was YES. [2023-08-30 20:42:53,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 438649 conditions, 29636 events. 18654/29636 cut-off events. For 1828525/1828525 co-relation queries the response was YES. Maximal size of possible extension queue 1500. Compared 223293 event pairs, 2375 based on Foata normal form. 4/29640 useless extension candidates. Maximal degree in co-relation 438425. Up to 21258 conditions per place. [2023-08-30 20:42:54,017 INFO L137 encePairwiseOnDemand]: 255/268 looper letters, 2211 selfloop transitions, 1920 changer transitions 1/4132 dead transitions. [2023-08-30 20:42:54,017 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 715 places, 4132 transitions, 139435 flow [2023-08-30 20:42:54,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-08-30 20:42:54,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2023-08-30 20:42:54,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 2485 transitions. [2023-08-30 20:42:54,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37089552238805973 [2023-08-30 20:42:54,019 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 2485 transitions. [2023-08-30 20:42:54,019 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 2485 transitions. [2023-08-30 20:42:54,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:42:54,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 2485 transitions. [2023-08-30 20:42:54,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 99.4) internal successors, (2485), 25 states have internal predecessors, (2485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:54,026 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 268.0) internal successors, (6968), 26 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:54,026 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 268.0) internal successors, (6968), 26 states have internal predecessors, (6968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:42:54,026 INFO L175 Difference]: Start difference. First operand has 691 places, 3484 transitions, 111455 flow. Second operand 25 states and 2485 transitions. [2023-08-30 20:42:54,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 715 places, 4132 transitions, 139435 flow [2023-08-30 20:43:25,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 684 places, 4132 transitions, 134401 flow, removed 1052 selfloop flow, removed 31 redundant places. [2023-08-30 20:43:25,535 INFO L231 Difference]: Finished difference. Result has 689 places, 3813 transitions, 123585 flow [2023-08-30 20:43:25,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=106673, PETRI_DIFFERENCE_MINUEND_PLACES=660, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3484, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1635, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1728, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=123585, PETRI_PLACES=689, PETRI_TRANSITIONS=3813} [2023-08-30 20:43:25,537 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 659 predicate places. [2023-08-30 20:43:25,537 INFO L495 AbstractCegarLoop]: Abstraction has has 689 places, 3813 transitions, 123585 flow [2023-08-30 20:43:25,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 91.0) internal successors, (3276), 36 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:43:25,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:43:25,537 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:43:25,542 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-08-30 20:43:25,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:25,738 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:43:25,738 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:43:25,738 INFO L85 PathProgramCache]: Analyzing trace with hash 1271727821, now seen corresponding path program 24 times [2023-08-30 20:43:25,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:43:25,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044984157] [2023-08-30 20:43:25,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:43:25,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:43:25,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:43:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:43:26,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:43:26,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044984157] [2023-08-30 20:43:26,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044984157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:43:26,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481610475] [2023-08-30 20:43:26,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 20:43:26,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:43:26,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:43:26,541 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:43:26,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-08-30 20:43:26,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-08-30 20:43:26,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:43:26,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 71 conjunts are in the unsatisfiable core [2023-08-30 20:43:26,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:43:26,939 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:26,939 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 16 [2023-08-30 20:43:26,959 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:43:26,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:43:27,066 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:43:27,067 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 36 treesize of output 44 [2023-08-30 20:43:27,146 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:43:27,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1481610475] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:43:27,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:43:27,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8, 6] total 22 [2023-08-30 20:43:27,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354985799] [2023-08-30 20:43:27,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:43:27,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-08-30 20:43:27,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:43:27,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-08-30 20:43:27,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2023-08-30 20:43:28,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 98 out of 268 [2023-08-30 20:43:28,526 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 689 places, 3813 transitions, 123585 flow. Second operand has 24 states, 24 states have (on average 100.375) internal successors, (2409), 24 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:43:28,526 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:43:28,526 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 98 of 268 [2023-08-30 20:43:28,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:43:55,333 INFO L130 PetriNetUnfolder]: 18113/29202 cut-off events. [2023-08-30 20:43:55,333 INFO L131 PetriNetUnfolder]: For 1867715/1870120 co-relation queries the response was YES. [2023-08-30 20:43:55,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 435661 conditions, 29202 events. 18113/29202 cut-off events. For 1867715/1870120 co-relation queries the response was YES. Maximal size of possible extension queue 1551. Compared 227472 event pairs, 2254 based on Foata normal form. 1192/30063 useless extension candidates. Maximal degree in co-relation 435431. Up to 22654 conditions per place. [2023-08-30 20:43:56,056 INFO L137 encePairwiseOnDemand]: 256/268 looper letters, 2544 selfloop transitions, 1435 changer transitions 1/4113 dead transitions. [2023-08-30 20:43:56,056 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 705 places, 4113 transitions, 140079 flow [2023-08-30 20:43:56,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 20:43:56,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 20:43:56,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1831 transitions. [2023-08-30 20:43:56,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4018876207199298 [2023-08-30 20:43:56,058 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1831 transitions. [2023-08-30 20:43:56,058 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1831 transitions. [2023-08-30 20:43:56,058 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:43:56,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1831 transitions. [2023-08-30 20:43:56,059 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 107.70588235294117) internal successors, (1831), 17 states have internal predecessors, (1831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:43:56,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:43:56,061 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 268.0) internal successors, (4824), 18 states have internal predecessors, (4824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:43:56,061 INFO L175 Difference]: Start difference. First operand has 689 places, 3813 transitions, 123585 flow. Second operand 17 states and 1831 transitions. [2023-08-30 20:43:56,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 705 places, 4113 transitions, 140079 flow [2023-08-30 20:44:25,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 697 places, 4113 transitions, 134591 flow, removed 1997 selfloop flow, removed 8 redundant places. [2023-08-30 20:44:25,799 INFO L231 Difference]: Finished difference. Result has 700 places, 3925 transitions, 125326 flow [2023-08-30 20:44:25,801 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=268, PETRI_DIFFERENCE_MINUEND_FLOW=118193, PETRI_DIFFERENCE_MINUEND_PLACES=681, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3813, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1323, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=2444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=125326, PETRI_PLACES=700, PETRI_TRANSITIONS=3925} [2023-08-30 20:44:25,801 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 670 predicate places. [2023-08-30 20:44:25,801 INFO L495 AbstractCegarLoop]: Abstraction has has 700 places, 3925 transitions, 125326 flow [2023-08-30 20:44:25,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 100.375) internal successors, (2409), 24 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:44:25,802 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 20:44:25,802 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 20:44:25,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2023-08-30 20:44:26,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-08-30 20:44:26,003 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-30 20:44:26,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 20:44:26,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1603233321, now seen corresponding path program 20 times [2023-08-30 20:44:26,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 20:44:26,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830536103] [2023-08-30 20:44:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 20:44:26,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 20:44:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 20:44:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 20:44:26,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 20:44:26,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830536103] [2023-08-30 20:44:26,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830536103] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 20:44:26,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951280104] [2023-08-30 20:44:26,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 20:44:26,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 20:44:26,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 20:44:26,733 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 20:44:26,738 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-08-30 20:44:26,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 20:44:26,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 20:44:26,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 82 conjunts are in the unsatisfiable core [2023-08-30 20:44:26,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 20:44:27,262 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-08-30 20:44:27,275 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:27,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 35 [2023-08-30 20:44:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-30 20:44:27,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 20:44:27,593 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-08-30 20:44:27,593 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 43 treesize of output 46 [2023-08-30 20:44:27,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-30 20:44:27,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951280104] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 20:44:27,714 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 20:44:27,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 9] total 30 [2023-08-30 20:44:27,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227388121] [2023-08-30 20:44:27,714 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 20:44:27,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-08-30 20:44:27,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 20:44:27,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-08-30 20:44:27,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2023-08-30 20:44:30,066 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 268 [2023-08-30 20:44:30,067 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 700 places, 3925 transitions, 125326 flow. Second operand has 32 states, 32 states have (on average 97.15625) internal successors, (3109), 32 states have internal predecessors, (3109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:44:30,067 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 20:44:30,067 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 268 [2023-08-30 20:44:30,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 20:45:03,087 INFO L130 PetriNetUnfolder]: 20083/32057 cut-off events. [2023-08-30 20:45:03,087 INFO L131 PetriNetUnfolder]: For 1835794/1835794 co-relation queries the response was YES. [2023-08-30 20:45:03,728 INFO L83 FinitePrefix]: Finished finitePrefix Result has 467664 conditions, 32057 events. 20083/32057 cut-off events. For 1835794/1835794 co-relation queries the response was YES. Maximal size of possible extension queue 1582. Compared 246785 event pairs, 2528 based on Foata normal form. 14/32071 useless extension candidates. Maximal degree in co-relation 467431. Up to 25970 conditions per place. [2023-08-30 20:45:03,918 INFO L137 encePairwiseOnDemand]: 253/268 looper letters, 2802 selfloop transitions, 1545 changer transitions 21/4368 dead transitions. [2023-08-30 20:45:03,919 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 740 places, 4368 transitions, 145501 flow [2023-08-30 20:45:03,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-08-30 20:45:03,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2023-08-30 20:45:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 4199 transitions. [2023-08-30 20:45:03,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38214415726246814 [2023-08-30 20:45:03,921 INFO L72 ComplementDD]: Start complementDD. Operand 41 states and 4199 transitions. [2023-08-30 20:45:03,921 INFO L73 IsDeterministic]: Start isDeterministic. Operand 41 states and 4199 transitions. [2023-08-30 20:45:03,921 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 20:45:03,921 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 41 states and 4199 transitions. [2023-08-30 20:45:03,924 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 42 states, 41 states have (on average 102.41463414634147) internal successors, (4199), 41 states have internal predecessors, (4199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:03,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 42 states, 42 states have (on average 268.0) internal successors, (11256), 42 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:03,928 INFO L81 ComplementDD]: Finished complementDD. Result has 42 states, 42 states have (on average 268.0) internal successors, (11256), 42 states have internal predecessors, (11256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 20:45:03,928 INFO L175 Difference]: Start difference. First operand has 700 places, 3925 transitions, 125326 flow. Second operand 41 states and 4199 transitions. [2023-08-30 20:45:03,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 740 places, 4368 transitions, 145501 flow Killed by 15