./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/popl20-prod-cons-eq.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/popl20-prod-cons-eq.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 29fee1864b0d56497c32cb33e6aaa24ed5707e21c5b89ec418c6707c5ac52336 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations BEFORE --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-09-01 14:20:24,967 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-09-01 14:20:24,969 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-09-01 14:20:25,013 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-09-01 14:20:25,015 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-09-01 14:20:25,018 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-09-01 14:20:25,020 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-09-01 14:20:25,022 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-09-01 14:20:25,024 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-09-01 14:20:25,029 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-09-01 14:20:25,030 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-09-01 14:20:25,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-09-01 14:20:25,032 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-09-01 14:20:25,034 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-09-01 14:20:25,036 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-09-01 14:20:25,044 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-09-01 14:20:25,045 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-09-01 14:20:25,046 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-09-01 14:20:25,048 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-09-01 14:20:25,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-09-01 14:20:25,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-09-01 14:20:25,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-09-01 14:20:25,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-09-01 14:20:25,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-09-01 14:20:25,064 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-09-01 14:20:25,064 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-09-01 14:20:25,064 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-09-01 14:20:25,067 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-09-01 14:20:25,067 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-09-01 14:20:25,068 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-09-01 14:20:25,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-09-01 14:20:25,073 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-09-01 14:20:25,074 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-09-01 14:20:25,075 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-09-01 14:20:25,076 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-09-01 14:20:25,077 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-09-01 14:20:25,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-09-01 14:20:25,077 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-09-01 14:20:25,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-09-01 14:20:25,078 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-09-01 14:20:25,079 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-09-01 14:20:25,080 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-09-01 14:20:25,113 INFO L113 SettingsManager]: Loading preferences was successful [2023-09-01 14:20:25,113 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-09-01 14:20:25,114 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-09-01 14:20:25,114 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-09-01 14:20:25,115 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-09-01 14:20:25,115 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-09-01 14:20:25,116 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-09-01 14:20:25,116 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-09-01 14:20:25,116 INFO L138 SettingsManager]: * Use SBE=true [2023-09-01 14:20:25,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-09-01 14:20:25,118 INFO L138 SettingsManager]: * sizeof long=4 [2023-09-01 14:20:25,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-09-01 14:20:25,118 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-09-01 14:20:25,118 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-09-01 14:20:25,118 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-09-01 14:20:25,119 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-09-01 14:20:25,119 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-09-01 14:20:25,119 INFO L138 SettingsManager]: * sizeof long double=12 [2023-09-01 14:20:25,119 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-09-01 14:20:25,119 INFO L138 SettingsManager]: * Use constant arrays=true [2023-09-01 14:20:25,119 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-09-01 14:20:25,120 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-09-01 14:20:25,120 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-09-01 14:20:25,120 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-09-01 14:20:25,120 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:20:25,121 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-09-01 14:20:25,121 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-09-01 14:20:25,121 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-09-01 14:20:25,121 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-09-01 14:20:25,121 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-09-01 14:20:25,121 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-09-01 14:20:25,122 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-09-01 14:20:25,122 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-09-01 14:20:25,122 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-09-01 14:20:25,122 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-09-01 14:20:25,123 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 29fee1864b0d56497c32cb33e6aaa24ed5707e21c5b89ec418c6707c5ac52336 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> BEFORE [2023-09-01 14:20:25,396 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-09-01 14:20:25,411 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-09-01 14:20:25,414 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-09-01 14:20:25,415 INFO L271 PluginConnector]: Initializing CDTParser... [2023-09-01 14:20:25,415 INFO L275 PluginConnector]: CDTParser initialized [2023-09-01 14:20:25,416 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/popl20-prod-cons-eq.wvr.c [2023-09-01 14:20:26,594 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-09-01 14:20:26,828 INFO L351 CDTParser]: Found 1 translation units. [2023-09-01 14:20:26,829 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/popl20-prod-cons-eq.wvr.c [2023-09-01 14:20:26,834 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f78cb2b6d/dbd07df4de64432b9ced89956e93668d/FLAGb0657e02d [2023-09-01 14:20:26,845 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f78cb2b6d/dbd07df4de64432b9ced89956e93668d [2023-09-01 14:20:26,847 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-09-01 14:20:26,848 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-09-01 14:20:26,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-09-01 14:20:26,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-09-01 14:20:26,856 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-09-01 14:20:26,856 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:20:26" (1/1) ... [2023-09-01 14:20:26,857 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31544d26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:26, skipping insertion in model container [2023-09-01 14:20:26,857 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 01.09 02:20:26" (1/1) ... [2023-09-01 14:20:26,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-09-01 14:20:26,895 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-09-01 14:20:27,045 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-prod-cons-eq.wvr.c[4380,4393] [2023-09-01 14:20:27,056 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:20:27,065 INFO L203 MainTranslator]: Completed pre-run [2023-09-01 14:20:27,090 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-prod-cons-eq.wvr.c[4380,4393] [2023-09-01 14:20:27,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-09-01 14:20:27,102 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:20:27,102 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-09-01 14:20:27,108 INFO L208 MainTranslator]: Completed translation [2023-09-01 14:20:27,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27 WrapperNode [2023-09-01 14:20:27,108 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-09-01 14:20:27,109 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-09-01 14:20:27,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-09-01 14:20:27,110 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-09-01 14:20:27,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (1/1) ... [2023-09-01 14:20:27,124 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (1/1) ... [2023-09-01 14:20:27,154 INFO L138 Inliner]: procedures = 28, calls = 80, calls flagged for inlining = 26, calls inlined = 32, statements flattened = 406 [2023-09-01 14:20:27,154 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-09-01 14:20:27,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-09-01 14:20:27,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-09-01 14:20:27,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-09-01 14:20:27,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (1/1) ... [2023-09-01 14:20:27,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (1/1) ... [2023-09-01 14:20:27,174 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (1/1) ... [2023-09-01 14:20:27,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (1/1) ... [2023-09-01 14:20:27,188 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (1/1) ... [2023-09-01 14:20:27,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (1/1) ... [2023-09-01 14:20:27,215 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (1/1) ... [2023-09-01 14:20:27,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (1/1) ... [2023-09-01 14:20:27,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-09-01 14:20:27,227 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-09-01 14:20:27,228 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-09-01 14:20:27,228 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-09-01 14:20:27,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (1/1) ... [2023-09-01 14:20:27,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-09-01 14:20:27,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:27,258 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-09-01 14:20:27,287 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-09-01 14:20:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-09-01 14:20:27,302 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-09-01 14:20:27,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-09-01 14:20:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-09-01 14:20:27,304 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-09-01 14:20:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-09-01 14:20:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-09-01 14:20:27,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-09-01 14:20:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-09-01 14:20:27,305 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-09-01 14:20:27,305 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-09-01 14:20:27,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-09-01 14:20:27,306 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-09-01 14:20:27,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-09-01 14:20:27,306 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-09-01 14:20:27,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-09-01 14:20:27,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-09-01 14:20:27,306 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-09-01 14:20:27,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-09-01 14:20:27,308 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-09-01 14:20:27,480 INFO L236 CfgBuilder]: Building ICFG [2023-09-01 14:20:27,482 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-09-01 14:20:28,033 INFO L277 CfgBuilder]: Performing block encoding [2023-09-01 14:20:28,157 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-09-01 14:20:28,158 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-09-01 14:20:28,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:20:28 BoogieIcfgContainer [2023-09-01 14:20:28,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-09-01 14:20:28,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-09-01 14:20:28,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-09-01 14:20:28,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-09-01 14:20:28,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 01.09 02:20:26" (1/3) ... [2023-09-01 14:20:28,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e913f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:20:28, skipping insertion in model container [2023-09-01 14:20:28,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 01.09 02:20:27" (2/3) ... [2023-09-01 14:20:28,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e913f82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 01.09 02:20:28, skipping insertion in model container [2023-09-01 14:20:28,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 01.09 02:20:28" (3/3) ... [2023-09-01 14:20:28,167 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons-eq.wvr.c [2023-09-01 14:20:28,173 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-09-01 14:20:28,181 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-09-01 14:20:28,181 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-09-01 14:20:28,181 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-09-01 14:20:28,293 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2023-09-01 14:20:28,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 360 places, 387 transitions, 798 flow [2023-09-01 14:20:28,480 INFO L130 PetriNetUnfolder]: 37/384 cut-off events. [2023-09-01 14:20:28,480 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:20:28,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 384 events. 37/384 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 413 event pairs, 0 based on Foata normal form. 0/346 useless extension candidates. Maximal degree in co-relation 305. Up to 2 conditions per place. [2023-09-01 14:20:28,488 INFO L82 GeneralOperation]: Start removeDead. Operand has 360 places, 387 transitions, 798 flow [2023-09-01 14:20:28,497 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 347 places, 374 transitions, 766 flow [2023-09-01 14:20:28,500 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-09-01 14:20:28,513 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 347 places, 374 transitions, 766 flow [2023-09-01 14:20:28,520 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 347 places, 374 transitions, 766 flow [2023-09-01 14:20:28,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 347 places, 374 transitions, 766 flow [2023-09-01 14:20:28,592 INFO L130 PetriNetUnfolder]: 37/374 cut-off events. [2023-09-01 14:20:28,593 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:20:28,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 374 events. 37/374 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 388 event pairs, 0 based on Foata normal form. 0/337 useless extension candidates. Maximal degree in co-relation 305. Up to 2 conditions per place. [2023-09-01 14:20:28,598 INFO L119 LiptonReduction]: Number of co-enabled transitions 4578 [2023-09-01 14:20:40,416 INFO L134 LiptonReduction]: Checked pairs total: 5390 [2023-09-01 14:20:40,416 INFO L136 LiptonReduction]: Total number of compositions: 429 [2023-09-01 14:20:40,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-09-01 14:20:40,433 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;@6677048c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-09-01 14:20:40,433 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-09-01 14:20:40,440 INFO L130 PetriNetUnfolder]: 9/34 cut-off events. [2023-09-01 14:20:40,440 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2023-09-01 14:20:40,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:40,441 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] [2023-09-01 14:20:40,441 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)] === [2023-09-01 14:20:40,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:40,445 INFO L85 PathProgramCache]: Analyzing trace with hash 450077520, now seen corresponding path program 1 times [2023-09-01 14:20:40,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:40,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787937323] [2023-09-01 14:20:40,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:40,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:40,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:40,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:40,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787937323] [2023-09-01 14:20:40,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787937323] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:20:40,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:20:40,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:20:40,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704602901] [2023-09-01 14:20:40,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:20:40,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:20:40,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:40,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:20:40,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:20:40,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 347 out of 816 [2023-09-01 14:20:40,993 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:40,993 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:40,994 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 347 of 816 [2023-09-01 14:20:40,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:41,135 INFO L130 PetriNetUnfolder]: 251/392 cut-off events. [2023-09-01 14:20:41,136 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2023-09-01 14:20:41,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 392 events. 251/392 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1419 event pairs, 67 based on Foata normal form. 0/290 useless extension candidates. Maximal degree in co-relation 656. Up to 227 conditions per place. [2023-09-01 14:20:41,142 INFO L137 encePairwiseOnDemand]: 813/816 looper letters, 43 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-09-01 14:20:41,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 47 transitions, 208 flow [2023-09-01 14:20:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:20:41,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:20:41,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1087 transitions. [2023-09-01 14:20:41,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4440359477124183 [2023-09-01 14:20:41,163 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1087 transitions. [2023-09-01 14:20:41,163 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1087 transitions. [2023-09-01 14:20:41,167 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:41,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1087 transitions. [2023-09-01 14:20:41,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 362.3333333333333) internal successors, (1087), 3 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:41,184 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 816.0) internal successors, (3264), 4 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:41,185 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 816.0) internal successors, (3264), 4 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:41,187 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 88 flow. Second operand 3 states and 1087 transitions. [2023-09-01 14:20:41,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 47 transitions, 208 flow [2023-09-01 14:20:41,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 47 transitions, 192 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-09-01 14:20:41,194 INFO L231 Difference]: Finished difference. Result has 33 places, 36 transitions, 88 flow [2023-09-01 14:20:41,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=33, PETRI_TRANSITIONS=36} [2023-09-01 14:20:41,202 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2023-09-01 14:20:41,204 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 36 transitions, 88 flow [2023-09-01 14:20:41,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 354.0) internal successors, (1062), 3 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:41,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:41,206 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] [2023-09-01 14:20:41,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-09-01 14:20:41,206 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)] === [2023-09-01 14:20:41,207 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:41,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1896403345, now seen corresponding path program 1 times [2023-09-01 14:20:41,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:41,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288285800] [2023-09-01 14:20:41,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:41,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:41,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-09-01 14:20:41,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:41,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288285800] [2023-09-01 14:20:41,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288285800] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:20:41,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:20:41,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-09-01 14:20:41,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981899801] [2023-09-01 14:20:41,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:20:41,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:20:41,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:41,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:20:41,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:20:41,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 816 [2023-09-01 14:20:41,584 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 36 transitions, 88 flow. Second operand has 4 states, 4 states have (on average 337.5) internal successors, (1350), 4 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:41,584 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:41,584 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 816 [2023-09-01 14:20:41,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:41,769 INFO L130 PetriNetUnfolder]: 322/552 cut-off events. [2023-09-01 14:20:41,769 INFO L131 PetriNetUnfolder]: For 62/62 co-relation queries the response was YES. [2023-09-01 14:20:41,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1256 conditions, 552 events. 322/552 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2355 event pairs, 241 based on Foata normal form. 40/459 useless extension candidates. Maximal degree in co-relation 669. Up to 385 conditions per place. [2023-09-01 14:20:41,772 INFO L137 encePairwiseOnDemand]: 806/816 looper letters, 33 selfloop transitions, 2 changer transitions 47/84 dead transitions. [2023-09-01 14:20:41,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 84 transitions, 358 flow [2023-09-01 14:20:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:20:41,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:20:41,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1745 transitions. [2023-09-01 14:20:41,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42769607843137253 [2023-09-01 14:20:41,778 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1745 transitions. [2023-09-01 14:20:41,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1745 transitions. [2023-09-01 14:20:41,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:41,779 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1745 transitions. [2023-09-01 14:20:41,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 349.0) internal successors, (1745), 5 states have internal predecessors, (1745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:41,788 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:41,789 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:41,790 INFO L175 Difference]: Start difference. First operand has 33 places, 36 transitions, 88 flow. Second operand 5 states and 1745 transitions. [2023-09-01 14:20:41,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 84 transitions, 358 flow [2023-09-01 14:20:41,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 84 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:20:41,792 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 116 flow [2023-09-01 14:20:41,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=116, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2023-09-01 14:20:41,793 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2023-09-01 14:20:41,793 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 116 flow [2023-09-01 14:20:41,794 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 337.5) internal successors, (1350), 4 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:41,794 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:41,794 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] [2023-09-01 14:20:41,794 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-09-01 14:20:41,795 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)] === [2023-09-01 14:20:41,795 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:41,795 INFO L85 PathProgramCache]: Analyzing trace with hash 1172777929, now seen corresponding path program 1 times [2023-09-01 14:20:41,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:41,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923911276] [2023-09-01 14:20:41,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:41,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:41,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:41,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:20:41,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:41,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923911276] [2023-09-01 14:20:41,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923911276] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:20:41,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:20:41,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:20:41,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983082812] [2023-09-01 14:20:41,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:20:41,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:20:41,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:41,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:20:41,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:20:41,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 816 [2023-09-01 14:20:41,937 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 349.75) internal successors, (1399), 4 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:41,937 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:41,937 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 816 [2023-09-01 14:20:41,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:42,099 INFO L130 PetriNetUnfolder]: 303/498 cut-off events. [2023-09-01 14:20:42,099 INFO L131 PetriNetUnfolder]: For 364/364 co-relation queries the response was YES. [2023-09-01 14:20:42,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1266 conditions, 498 events. 303/498 cut-off events. For 364/364 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1844 event pairs, 224 based on Foata normal form. 22/448 useless extension candidates. Maximal degree in co-relation 1251. Up to 386 conditions per place. [2023-09-01 14:20:42,102 INFO L137 encePairwiseOnDemand]: 811/816 looper letters, 36 selfloop transitions, 2 changer transitions 16/56 dead transitions. [2023-09-01 14:20:42,102 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 56 transitions, 275 flow [2023-09-01 14:20:42,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-09-01 14:20:42,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-09-01 14:20:42,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 1430 transitions. [2023-09-01 14:20:42,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4381127450980392 [2023-09-01 14:20:42,106 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 1430 transitions. [2023-09-01 14:20:42,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 1430 transitions. [2023-09-01 14:20:42,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:42,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 1430 transitions. [2023-09-01 14:20:42,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 357.5) internal successors, (1430), 4 states have internal predecessors, (1430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 816.0) internal successors, (4080), 5 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,116 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 816.0) internal successors, (4080), 5 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,116 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 116 flow. Second operand 4 states and 1430 transitions. [2023-09-01 14:20:42,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 56 transitions, 275 flow [2023-09-01 14:20:42,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 257 flow, removed 8 selfloop flow, removed 1 redundant places. [2023-09-01 14:20:42,118 INFO L231 Difference]: Finished difference. Result has 41 places, 38 transitions, 118 flow [2023-09-01 14:20:42,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=118, PETRI_PLACES=41, PETRI_TRANSITIONS=38} [2023-09-01 14:20:42,119 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 5 predicate places. [2023-09-01 14:20:42,119 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 38 transitions, 118 flow [2023-09-01 14:20:42,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 349.75) internal successors, (1399), 4 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:42,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:42,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-09-01 14:20:42,121 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)] === [2023-09-01 14:20:42,122 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:42,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1852307064, now seen corresponding path program 1 times [2023-09-01 14:20:42,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:42,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287574496] [2023-09-01 14:20:42,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:42,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:42,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:42,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-09-01 14:20:42,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:42,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287574496] [2023-09-01 14:20:42,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287574496] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:20:42,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:20:42,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:20:42,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334671232] [2023-09-01 14:20:42,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:20:42,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:20:42,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:42,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:20:42,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:20:42,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 816 [2023-09-01 14:20:42,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 38 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 338.25) internal successors, (1353), 4 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:42,345 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 816 [2023-09-01 14:20:42,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:42,542 INFO L130 PetriNetUnfolder]: 358/610 cut-off events. [2023-09-01 14:20:42,543 INFO L131 PetriNetUnfolder]: For 843/843 co-relation queries the response was YES. [2023-09-01 14:20:42,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1594 conditions, 610 events. 358/610 cut-off events. For 843/843 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2605 event pairs, 265 based on Foata normal form. 80/655 useless extension candidates. Maximal degree in co-relation 1573. Up to 389 conditions per place. [2023-09-01 14:20:42,547 INFO L137 encePairwiseOnDemand]: 811/816 looper letters, 35 selfloop transitions, 2 changer transitions 40/79 dead transitions. [2023-09-01 14:20:42,548 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 79 transitions, 385 flow [2023-09-01 14:20:42,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:20:42,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:20:42,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1737 transitions. [2023-09-01 14:20:42,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42573529411764705 [2023-09-01 14:20:42,553 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1737 transitions. [2023-09-01 14:20:42,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1737 transitions. [2023-09-01 14:20:42,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:42,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1737 transitions. [2023-09-01 14:20:42,557 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 347.4) internal successors, (1737), 5 states have internal predecessors, (1737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,590 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,591 INFO L175 Difference]: Start difference. First operand has 41 places, 38 transitions, 118 flow. Second operand 5 states and 1737 transitions. [2023-09-01 14:20:42,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 79 transitions, 385 flow [2023-09-01 14:20:42,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 79 transitions, 374 flow, removed 4 selfloop flow, removed 2 redundant places. [2023-09-01 14:20:42,596 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 136 flow [2023-09-01 14:20:42,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2023-09-01 14:20:42,598 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2023-09-01 14:20:42,598 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 136 flow [2023-09-01 14:20:42,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 338.25) internal successors, (1353), 4 states have internal predecessors, (1353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:42,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:42,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-09-01 14:20:42,600 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)] === [2023-09-01 14:20:42,600 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:42,600 INFO L85 PathProgramCache]: Analyzing trace with hash 896860092, now seen corresponding path program 1 times [2023-09-01 14:20:42,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:42,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75450759] [2023-09-01 14:20:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:42,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:20:42,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:42,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75450759] [2023-09-01 14:20:42,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75450759] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:20:42,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:20:42,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-09-01 14:20:42,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741470314] [2023-09-01 14:20:42,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:20:42,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-09-01 14:20:42,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-09-01 14:20:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-09-01 14:20:42,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 348 out of 816 [2023-09-01 14:20:42,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:42,782 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 348 of 816 [2023-09-01 14:20:42,782 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:42,933 INFO L130 PetriNetUnfolder]: 403/625 cut-off events. [2023-09-01 14:20:42,933 INFO L131 PetriNetUnfolder]: For 1063/1063 co-relation queries the response was YES. [2023-09-01 14:20:42,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1894 conditions, 625 events. 403/625 cut-off events. For 1063/1063 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2504 event pairs, 110 based on Foata normal form. 26/596 useless extension candidates. Maximal degree in co-relation 1871. Up to 397 conditions per place. [2023-09-01 14:20:42,938 INFO L137 encePairwiseOnDemand]: 813/816 looper letters, 48 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-09-01 14:20:42,938 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 52 transitions, 286 flow [2023-09-01 14:20:42,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-09-01 14:20:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-09-01 14:20:42,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1090 transitions. [2023-09-01 14:20:42,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452614379084967 [2023-09-01 14:20:42,941 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1090 transitions. [2023-09-01 14:20:42,941 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1090 transitions. [2023-09-01 14:20:42,942 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:42,942 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1090 transitions. [2023-09-01 14:20:42,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 363.3333333333333) internal successors, (1090), 3 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,949 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 816.0) internal successors, (3264), 4 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 816.0) internal successors, (3264), 4 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,951 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 136 flow. Second operand 3 states and 1090 transitions. [2023-09-01 14:20:42,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 52 transitions, 286 flow [2023-09-01 14:20:42,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 52 transitions, 264 flow, removed 10 selfloop flow, removed 3 redundant places. [2023-09-01 14:20:42,955 INFO L231 Difference]: Finished difference. Result has 43 places, 40 transitions, 134 flow [2023-09-01 14:20:42,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=43, PETRI_TRANSITIONS=40} [2023-09-01 14:20:42,958 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2023-09-01 14:20:42,958 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 40 transitions, 134 flow [2023-09-01 14:20:42,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 356.6666666666667) internal successors, (1070), 3 states have internal predecessors, (1070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:42,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:42,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:42,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-09-01 14:20:42,959 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)] === [2023-09-01 14:20:42,960 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:42,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1927203542, now seen corresponding path program 1 times [2023-09-01 14:20:42,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:42,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418246636] [2023-09-01 14:20:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:42,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:43,156 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:20:43,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:43,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418246636] [2023-09-01 14:20:43,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418246636] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:20:43,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:20:43,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:20:43,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100193924] [2023-09-01 14:20:43,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:20:43,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:20:43,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:43,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:20:43,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:20:43,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 332 out of 816 [2023-09-01 14:20:43,223 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 40 transitions, 134 flow. Second operand has 4 states, 4 states have (on average 339.25) internal successors, (1357), 4 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:43,223 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:43,223 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 332 of 816 [2023-09-01 14:20:43,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:43,382 INFO L130 PetriNetUnfolder]: 422/672 cut-off events. [2023-09-01 14:20:43,383 INFO L131 PetriNetUnfolder]: For 437/437 co-relation queries the response was YES. [2023-09-01 14:20:43,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1895 conditions, 672 events. 422/672 cut-off events. For 437/437 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2690 event pairs, 329 based on Foata normal form. 26/638 useless extension candidates. Maximal degree in co-relation 1872. Up to 622 conditions per place. [2023-09-01 14:20:43,388 INFO L137 encePairwiseOnDemand]: 809/816 looper letters, 37 selfloop transitions, 2 changer transitions 20/61 dead transitions. [2023-09-01 14:20:43,388 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 61 transitions, 325 flow [2023-09-01 14:20:43,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:20:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:20:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1714 transitions. [2023-09-01 14:20:43,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4200980392156863 [2023-09-01 14:20:43,394 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1714 transitions. [2023-09-01 14:20:43,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1714 transitions. [2023-09-01 14:20:43,395 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:43,395 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1714 transitions. [2023-09-01 14:20:43,398 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 342.8) internal successors, (1714), 5 states have internal predecessors, (1714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:43,404 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:43,405 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:43,406 INFO L175 Difference]: Start difference. First operand has 43 places, 40 transitions, 134 flow. Second operand 5 states and 1714 transitions. [2023-09-01 14:20:43,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 61 transitions, 325 flow [2023-09-01 14:20:43,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 61 transitions, 323 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-09-01 14:20:43,408 INFO L231 Difference]: Finished difference. Result has 49 places, 41 transitions, 152 flow [2023-09-01 14:20:43,409 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=41} [2023-09-01 14:20:43,411 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2023-09-01 14:20:43,411 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 41 transitions, 152 flow [2023-09-01 14:20:43,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 339.25) internal successors, (1357), 4 states have internal predecessors, (1357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:43,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:43,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:43,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-09-01 14:20:43,416 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)] === [2023-09-01 14:20:43,417 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:43,417 INFO L85 PathProgramCache]: Analyzing trace with hash -797598496, now seen corresponding path program 1 times [2023-09-01 14:20:43,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:43,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882807906] [2023-09-01 14:20:43,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:43,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:43,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:43,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 14:20:43,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:43,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882807906] [2023-09-01 14:20:43,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882807906] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:20:43,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:20:43,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-09-01 14:20:43,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600969430] [2023-09-01 14:20:43,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:20:43,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-09-01 14:20:43,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:43,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-09-01 14:20:43,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-09-01 14:20:43,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 816 [2023-09-01 14:20:43,660 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 41 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 351.75) internal successors, (1407), 4 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:43,660 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:43,660 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 816 [2023-09-01 14:20:43,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:43,988 INFO L130 PetriNetUnfolder]: 1202/1737 cut-off events. [2023-09-01 14:20:43,988 INFO L131 PetriNetUnfolder]: For 1358/1358 co-relation queries the response was YES. [2023-09-01 14:20:43,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4953 conditions, 1737 events. 1202/1737 cut-off events. For 1358/1358 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 6943 event pairs, 196 based on Foata normal form. 62/1667 useless extension candidates. Maximal degree in co-relation 4927. Up to 820 conditions per place. [2023-09-01 14:20:43,999 INFO L137 encePairwiseOnDemand]: 809/816 looper letters, 72 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2023-09-01 14:20:43,999 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 84 transitions, 479 flow [2023-09-01 14:20:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:20:43,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:20:44,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1794 transitions. [2023-09-01 14:20:44,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43970588235294117 [2023-09-01 14:20:44,004 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1794 transitions. [2023-09-01 14:20:44,004 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1794 transitions. [2023-09-01 14:20:44,005 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:44,005 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1794 transitions. [2023-09-01 14:20:44,008 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 358.8) internal successors, (1794), 5 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:44,013 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:44,014 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:44,014 INFO L175 Difference]: Start difference. First operand has 49 places, 41 transitions, 152 flow. Second operand 5 states and 1794 transitions. [2023-09-01 14:20:44,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 84 transitions, 479 flow [2023-09-01 14:20:44,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 84 transitions, 471 flow, removed 3 selfloop flow, removed 2 redundant places. [2023-09-01 14:20:44,019 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 264 flow [2023-09-01 14:20:44,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2023-09-01 14:20:44,019 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 17 predicate places. [2023-09-01 14:20:44,019 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 264 flow [2023-09-01 14:20:44,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 351.75) internal successors, (1407), 4 states have internal predecessors, (1407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:44,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:44,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:44,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-09-01 14:20:44,032 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)] === [2023-09-01 14:20:44,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:44,032 INFO L85 PathProgramCache]: Analyzing trace with hash 816445328, now seen corresponding path program 2 times [2023-09-01 14:20:44,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:44,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628131540] [2023-09-01 14:20:44,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:44,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:44,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 14:20:44,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:44,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628131540] [2023-09-01 14:20:44,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628131540] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:44,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182448795] [2023-09-01 14:20:44,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:20:44,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:44,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:44,359 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:44,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-09-01 14:20:44,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:20:44,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:44,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 5 conjunts are in the unsatisfiable core [2023-09-01 14:20:44,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:44,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-09-01 14:20:44,634 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-09-01 14:20:44,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182448795] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:20:44,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-09-01 14:20:44,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2023-09-01 14:20:44,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137362359] [2023-09-01 14:20:44,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:20:44,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:20:44,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:44,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:20:44,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-09-01 14:20:44,650 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 346 out of 816 [2023-09-01 14:20:44,652 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 264 flow. Second operand has 5 states, 5 states have (on average 352.2) internal successors, (1761), 5 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:44,652 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:44,652 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 346 of 816 [2023-09-01 14:20:44,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:45,191 INFO L130 PetriNetUnfolder]: 2012/2903 cut-off events. [2023-09-01 14:20:45,191 INFO L131 PetriNetUnfolder]: For 5608/5608 co-relation queries the response was YES. [2023-09-01 14:20:45,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10811 conditions, 2903 events. 2012/2903 cut-off events. For 5608/5608 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 12744 event pairs, 283 based on Foata normal form. 38/2715 useless extension candidates. Maximal degree in co-relation 10781. Up to 1039 conditions per place. [2023-09-01 14:20:45,212 INFO L137 encePairwiseOnDemand]: 810/816 looper letters, 94 selfloop transitions, 19 changer transitions 0/113 dead transitions. [2023-09-01 14:20:45,212 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 113 transitions, 811 flow [2023-09-01 14:20:45,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-09-01 14:20:45,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-09-01 14:20:45,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 2158 transitions. [2023-09-01 14:20:45,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44076797385620914 [2023-09-01 14:20:45,218 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 2158 transitions. [2023-09-01 14:20:45,218 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 2158 transitions. [2023-09-01 14:20:45,219 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:45,219 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 2158 transitions. [2023-09-01 14:20:45,222 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 359.6666666666667) internal successors, (2158), 6 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:45,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 816.0) internal successors, (5712), 7 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:45,229 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 816.0) internal successors, (5712), 7 states have internal predecessors, (5712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:45,229 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 264 flow. Second operand 6 states and 2158 transitions. [2023-09-01 14:20:45,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 113 transitions, 811 flow [2023-09-01 14:20:45,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 113 transitions, 811 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-09-01 14:20:45,236 INFO L231 Difference]: Finished difference. Result has 62 places, 67 transitions, 491 flow [2023-09-01 14:20:45,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=491, PETRI_PLACES=62, PETRI_TRANSITIONS=67} [2023-09-01 14:20:45,239 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 26 predicate places. [2023-09-01 14:20:45,239 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 67 transitions, 491 flow [2023-09-01 14:20:45,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 352.2) internal successors, (1761), 5 states have internal predecessors, (1761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:45,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:45,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:45,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:45,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:45,452 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)] === [2023-09-01 14:20:45,452 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:45,453 INFO L85 PathProgramCache]: Analyzing trace with hash -608069975, now seen corresponding path program 1 times [2023-09-01 14:20:45,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:45,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555802194] [2023-09-01 14:20:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:45,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:45,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:45,876 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-09-01 14:20:45,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:45,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555802194] [2023-09-01 14:20:45,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555802194] provided 1 perfect and 0 imperfect interpolant sequences [2023-09-01 14:20:45,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-09-01 14:20:45,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-09-01 14:20:45,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094745867] [2023-09-01 14:20:45,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:20:45,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:20:45,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:45,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:20:45,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-09-01 14:20:45,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 328 out of 816 [2023-09-01 14:20:45,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 67 transitions, 491 flow. Second operand has 5 states, 5 states have (on average 334.2) internal successors, (1671), 5 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:45,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:45,990 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 328 of 816 [2023-09-01 14:20:45,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:46,541 INFO L130 PetriNetUnfolder]: 1954/2936 cut-off events. [2023-09-01 14:20:46,542 INFO L131 PetriNetUnfolder]: For 15476/15935 co-relation queries the response was YES. [2023-09-01 14:20:46,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13055 conditions, 2936 events. 1954/2936 cut-off events. For 15476/15935 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14108 event pairs, 1026 based on Foata normal form. 383/3016 useless extension candidates. Maximal degree in co-relation 13019. Up to 2440 conditions per place. [2023-09-01 14:20:46,567 INFO L137 encePairwiseOnDemand]: 811/816 looper letters, 55 selfloop transitions, 2 changer transitions 40/108 dead transitions. [2023-09-01 14:20:46,567 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 108 transitions, 928 flow [2023-09-01 14:20:46,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:20:46,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:20:46,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1704 transitions. [2023-09-01 14:20:46,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176470588235294 [2023-09-01 14:20:46,572 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1704 transitions. [2023-09-01 14:20:46,572 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1704 transitions. [2023-09-01 14:20:46,573 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:46,573 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1704 transitions. [2023-09-01 14:20:46,576 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 340.8) internal successors, (1704), 5 states have internal predecessors, (1704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:46,580 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:46,581 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:46,581 INFO L175 Difference]: Start difference. First operand has 62 places, 67 transitions, 491 flow. Second operand 5 states and 1704 transitions. [2023-09-01 14:20:46,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 108 transitions, 928 flow [2023-09-01 14:20:46,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 108 transitions, 901 flow, removed 13 selfloop flow, removed 1 redundant places. [2023-09-01 14:20:46,594 INFO L231 Difference]: Finished difference. Result has 68 places, 68 transitions, 496 flow [2023-09-01 14:20:46,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=496, PETRI_PLACES=68, PETRI_TRANSITIONS=68} [2023-09-01 14:20:46,595 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2023-09-01 14:20:46,596 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 68 transitions, 496 flow [2023-09-01 14:20:46,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 334.2) internal successors, (1671), 5 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:46,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:46,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:46,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-09-01 14:20:46,597 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)] === [2023-09-01 14:20:46,597 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:46,597 INFO L85 PathProgramCache]: Analyzing trace with hash 912604163, now seen corresponding path program 1 times [2023-09-01 14:20:46,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:46,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695973689] [2023-09-01 14:20:46,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:46,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:46,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:20:46,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:46,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695973689] [2023-09-01 14:20:46,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695973689] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:46,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977942043] [2023-09-01 14:20:46,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:46,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:46,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:46,808 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:46,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-09-01 14:20:47,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:47,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 8 conjunts are in the unsatisfiable core [2023-09-01 14:20:47,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:47,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:20:47,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:47,111 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:20:47,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977942043] provided 1 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:47,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-09-01 14:20:47,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2023-09-01 14:20:47,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084289115] [2023-09-01 14:20:47,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-09-01 14:20:47,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-09-01 14:20:47,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:47,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-09-01 14:20:47,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:20:47,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 318 out of 816 [2023-09-01 14:20:47,254 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 68 transitions, 496 flow. Second operand has 5 states, 5 states have (on average 324.4) internal successors, (1622), 5 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:47,254 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:47,254 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 318 of 816 [2023-09-01 14:20:47,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:47,725 INFO L130 PetriNetUnfolder]: 1719/2553 cut-off events. [2023-09-01 14:20:47,725 INFO L131 PetriNetUnfolder]: For 12555/12938 co-relation queries the response was YES. [2023-09-01 14:20:47,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11294 conditions, 2553 events. 1719/2553 cut-off events. For 12555/12938 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 12145 event pairs, 985 based on Foata normal form. 242/2527 useless extension candidates. Maximal degree in co-relation 11254. Up to 2389 conditions per place. [2023-09-01 14:20:47,753 INFO L137 encePairwiseOnDemand]: 811/816 looper letters, 54 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-09-01 14:20:47,753 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 614 flow [2023-09-01 14:20:47,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-09-01 14:20:47,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-09-01 14:20:47,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 1626 transitions. [2023-09-01 14:20:47,758 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3985294117647059 [2023-09-01 14:20:47,758 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 1626 transitions. [2023-09-01 14:20:47,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 1626 transitions. [2023-09-01 14:20:47,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:47,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 1626 transitions. [2023-09-01 14:20:47,762 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 325.2) internal successors, (1626), 5 states have internal predecessors, (1626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:47,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:47,768 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 816.0) internal successors, (4896), 6 states have internal predecessors, (4896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:47,769 INFO L175 Difference]: Start difference. First operand has 68 places, 68 transitions, 496 flow. Second operand 5 states and 1626 transitions. [2023-09-01 14:20:47,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 614 flow [2023-09-01 14:20:47,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 69 transitions, 594 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-09-01 14:20:47,781 INFO L231 Difference]: Finished difference. Result has 68 places, 69 transitions, 492 flow [2023-09-01 14:20:47,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=492, PETRI_PLACES=68, PETRI_TRANSITIONS=69} [2023-09-01 14:20:47,783 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2023-09-01 14:20:47,783 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 69 transitions, 492 flow [2023-09-01 14:20:47,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 324.4) internal successors, (1622), 5 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:47,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:47,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:47,795 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:47,991 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,SelfDestructingSolverStorable9 [2023-09-01 14:20:47,991 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)] === [2023-09-01 14:20:47,992 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:47,992 INFO L85 PathProgramCache]: Analyzing trace with hash 874019100, now seen corresponding path program 1 times [2023-09-01 14:20:47,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:47,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249657723] [2023-09-01 14:20:47,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:47,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:48,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:48,276 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:20:48,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:48,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249657723] [2023-09-01 14:20:48,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1249657723] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:48,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442173363] [2023-09-01 14:20:48,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:48,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:48,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:48,281 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:48,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-09-01 14:20:48,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:48,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 7 conjunts are in the unsatisfiable core [2023-09-01 14:20:48,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:20:48,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-09-01 14:20:48,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442173363] provided 0 perfect and 2 imperfect interpolant sequences [2023-09-01 14:20:48,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-09-01 14:20:48,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 9 [2023-09-01 14:20:48,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206795934] [2023-09-01 14:20:48,663 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-09-01 14:20:48,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-09-01 14:20:48,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-09-01 14:20:48,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-09-01 14:20:48,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-09-01 14:20:48,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 816 [2023-09-01 14:20:48,682 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 69 transitions, 492 flow. Second operand has 9 states, 9 states have (on average 348.55555555555554) internal successors, (3137), 9 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:48,683 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-09-01 14:20:48,683 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 816 [2023-09-01 14:20:48,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-09-01 14:20:49,283 INFO L130 PetriNetUnfolder]: 1941/2822 cut-off events. [2023-09-01 14:20:49,284 INFO L131 PetriNetUnfolder]: For 9364/9364 co-relation queries the response was YES. [2023-09-01 14:20:49,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12150 conditions, 2822 events. 1941/2822 cut-off events. For 9364/9364 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 12066 event pairs, 70 based on Foata normal form. 116/2716 useless extension candidates. Maximal degree in co-relation 12110. Up to 1326 conditions per place. [2023-09-01 14:20:49,299 INFO L137 encePairwiseOnDemand]: 809/816 looper letters, 101 selfloop transitions, 31 changer transitions 0/132 dead transitions. [2023-09-01 14:20:49,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 132 transitions, 1103 flow [2023-09-01 14:20:49,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-09-01 14:20:49,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-09-01 14:20:49,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 2489 transitions. [2023-09-01 14:20:49,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43574929971988796 [2023-09-01 14:20:49,306 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 2489 transitions. [2023-09-01 14:20:49,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 2489 transitions. [2023-09-01 14:20:49,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-09-01 14:20:49,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 2489 transitions. [2023-09-01 14:20:49,312 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 355.57142857142856) internal successors, (2489), 7 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:49,319 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 816.0) internal successors, (6528), 8 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:49,320 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 816.0) internal successors, (6528), 8 states have internal predecessors, (6528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:49,320 INFO L175 Difference]: Start difference. First operand has 68 places, 69 transitions, 492 flow. Second operand 7 states and 2489 transitions. [2023-09-01 14:20:49,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 132 transitions, 1103 flow [2023-09-01 14:20:49,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 132 transitions, 1095 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-09-01 14:20:49,332 INFO L231 Difference]: Finished difference. Result has 73 places, 84 transitions, 762 flow [2023-09-01 14:20:49,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=816, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=762, PETRI_PLACES=73, PETRI_TRANSITIONS=84} [2023-09-01 14:20:49,333 INFO L281 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2023-09-01 14:20:49,333 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 84 transitions, 762 flow [2023-09-01 14:20:49,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 348.55555555555554) internal successors, (3137), 9 states have internal predecessors, (3137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-09-01 14:20:49,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-09-01 14:20:49,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-09-01 14:20:49,343 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-09-01 14:20:49,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:49,541 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)] === [2023-09-01 14:20:49,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-09-01 14:20:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash 216142454, now seen corresponding path program 2 times [2023-09-01 14:20:49,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-09-01 14:20:49,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495076038] [2023-09-01 14:20:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-09-01 14:20:49,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-09-01 14:20:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-09-01 14:20:50,593 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:20:50,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-09-01 14:20:50,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495076038] [2023-09-01 14:20:50,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495076038] provided 0 perfect and 1 imperfect interpolant sequences [2023-09-01 14:20:50,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962912510] [2023-09-01 14:20:50,594 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-09-01 14:20:50,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-09-01 14:20:50,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-09-01 14:20:50,596 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-09-01 14:20:50,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-09-01 14:20:50,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-09-01 14:20:50,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-09-01 14:20:50,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 546 conjuncts, 61 conjunts are in the unsatisfiable core [2023-09-01 14:20:50,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-09-01 14:20:50,989 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:20:51,072 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-09-01 14:20:51,073 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 11 treesize of output 11 [2023-09-01 14:20:51,176 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-09-01 14:20:51,281 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:20:51,295 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 14:20:51,312 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-09-01 14:20:51,384 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:20:51,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:20:51,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:20:51,400 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 42 treesize of output 38 [2023-09-01 14:20:51,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:20:51,498 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 33 treesize of output 31 [2023-09-01 14:20:51,509 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:20:51,515 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:20:51,612 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:20:51,618 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-09-01 14:20:51,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-09-01 14:20:51,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 24 [2023-09-01 14:20:51,960 INFO L321 Elim1Store]: treesize reduction 69, result has 41.0 percent of original size [2023-09-01 14:20:51,961 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 92 [2023-09-01 14:20:51,980 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 65 treesize of output 53 [2023-09-01 14:20:51,986 INFO L173 IndexEqualityManager]: detected equality via solver [2023-09-01 14:20:51,989 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:20:51,990 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 61 treesize of output 48 [2023-09-01 14:20:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-09-01 14:20:52,013 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-09-01 14:20:54,789 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:20:54,790 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 199 treesize of output 188 [2023-09-01 14:20:54,825 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:20:54,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 2618 treesize of output 2602 [2023-09-01 14:20:54,870 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:20:54,870 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 1282 treesize of output 1102 [2023-09-01 14:20:54,912 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:20:54,913 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 14850 treesize of output 14610 [2023-09-01 14:20:54,985 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:20:54,986 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 902 treesize of output 886 [2023-09-01 14:20:55,015 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:20:55,016 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 878 treesize of output 862 [2023-09-01 14:20:55,045 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:20:55,046 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 854 treesize of output 814 [2023-09-01 14:20:55,075 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:20:55,075 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 806 treesize of output 766 [2023-09-01 14:20:55,104 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:20:55,105 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 390 treesize of output 387 [2023-09-01 14:20:55,137 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-09-01 14:20:55,138 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 378 treesize of output 375 [2023-09-01 14:23:08,231 WARN L222 SmtUtils]: Spent 10.60s on a formula simplification. DAG size of input: 2628 DAG size of output: 2635 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 14:25:14,342 WARN L222 SmtUtils]: Spent 23.86s on a formula simplification. DAG size of input: 4123 DAG size of output: 4130 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 14:25:54,662 WARN L222 SmtUtils]: Spent 32.08s on a formula simplification. DAG size of input: 4101 DAG size of output: 4166 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 14:31:26,084 WARN L222 SmtUtils]: Spent 12.18s on a formula simplification that was a NOOP. DAG size: 10187 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 14:33:02,967 WARN L222 SmtUtils]: Spent 1.29m on a formula simplification. DAG size of input: 7070 DAG size of output: 7073 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2023-09-01 14:33:21,726 WARN L222 SmtUtils]: Spent 9.06s on a formula simplification that was a NOOP. DAG size: 7062 (called from [L 800] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) Killed by 15