./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c --full-output --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b8dbc81d Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/weaver/test-easy11.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 a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --traceabstraction.when.to.check.the.insufficient.erros.location.relative.to.the.other.error.locations AFTER --- Real Ultimate output --- This is Ultimate 0.2.3-?-b8dbc81 [2023-08-30 21:49:14,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-08-30 21:49:14,061 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-08-30 21:49:14,097 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-08-30 21:49:14,099 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-08-30 21:49:14,102 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-08-30 21:49:14,104 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-08-30 21:49:14,107 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-08-30 21:49:14,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-08-30 21:49:14,113 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-08-30 21:49:14,114 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-08-30 21:49:14,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-08-30 21:49:14,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-08-30 21:49:14,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-08-30 21:49:14,119 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-08-30 21:49:14,123 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-08-30 21:49:14,124 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-08-30 21:49:14,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-08-30 21:49:14,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-08-30 21:49:14,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-08-30 21:49:14,132 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-08-30 21:49:14,133 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-08-30 21:49:14,134 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-08-30 21:49:14,135 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-08-30 21:49:14,141 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-08-30 21:49:14,143 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-08-30 21:49:14,143 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-08-30 21:49:14,144 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-08-30 21:49:14,145 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-08-30 21:49:14,146 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-08-30 21:49:14,147 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-08-30 21:49:14,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-08-30 21:49:14,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-08-30 21:49:14,154 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-08-30 21:49:14,155 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-08-30 21:49:14,156 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-08-30 21:49:14,156 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-08-30 21:49:14,156 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-08-30 21:49:14,156 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-08-30 21:49:14,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-08-30 21:49:14,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-08-30 21:49:14,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-30 21:49:14,199 INFO L113 SettingsManager]: Loading preferences was successful [2023-08-30 21:49:14,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-30 21:49:14,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-30 21:49:14,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-30 21:49:14,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-30 21:49:14,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-30 21:49:14,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-30 21:49:14,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-08-30 21:49:14,202 INFO L138 SettingsManager]: * Use SBE=true [2023-08-30 21:49:14,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-30 21:49:14,203 INFO L138 SettingsManager]: * sizeof long=4 [2023-08-30 21:49:14,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-30 21:49:14,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-08-30 21:49:14,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-08-30 21:49:14,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-30 21:49:14,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-30 21:49:14,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-30 21:49:14,204 INFO L138 SettingsManager]: * sizeof long double=12 [2023-08-30 21:49:14,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-08-30 21:49:14,205 INFO L138 SettingsManager]: * Use constant arrays=true [2023-08-30 21:49:14,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-30 21:49:14,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-30 21:49:14,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-30 21:49:14,205 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-30 21:49:14,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:49:14,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-30 21:49:14,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-30 21:49:14,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-30 21:49:14,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-30 21:49:14,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-30 21:49:14,206 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-30 21:49:14,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-30 21:49:14,207 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-30 21:49:14,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-30 21:49:14,207 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-30 21:49:14,207 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: When to check the insufficient erros location relative to the other error locations -> AFTER [2023-08-30 21:49:14,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-30 21:49:14,503 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-30 21:49:14,505 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-30 21:49:14,506 INFO L271 PluginConnector]: Initializing CDTParser... [2023-08-30 21:49:14,507 INFO L275 PluginConnector]: CDTParser initialized [2023-08-30 21:49:14,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-08-30 21:49:15,714 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-08-30 21:49:15,854 INFO L351 CDTParser]: Found 1 translation units. [2023-08-30 21:49:15,855 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/test-easy11.wvr.c [2023-08-30 21:49:15,865 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6171319f/7e4219704d0b4d0390cbb2c55a50a10d/FLAGaccf9ec90 [2023-08-30 21:49:15,880 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d6171319f/7e4219704d0b4d0390cbb2c55a50a10d [2023-08-30 21:49:15,883 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-30 21:49:15,884 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-08-30 21:49:15,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-30 21:49:15,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-30 21:49:15,890 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-30 21:49:15,891 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:49:15" (1/1) ... [2023-08-30 21:49:15,892 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30264cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:15, skipping insertion in model container [2023-08-30 21:49:15,892 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.08 09:49:15" (1/1) ... [2023-08-30 21:49:15,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-08-30 21:49:15,915 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-08-30 21:49:16,084 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/test-easy11.wvr.c[2005,2018] [2023-08-30 21:49:16,088 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:49:16,098 INFO L203 MainTranslator]: Completed pre-run [2023-08-30 21:49:16,121 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/test-easy11.wvr.c[2005,2018] [2023-08-30 21:49:16,126 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-30 21:49:16,133 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:49:16,133 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-30 21:49:16,138 INFO L208 MainTranslator]: Completed translation [2023-08-30 21:49:16,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16 WrapperNode [2023-08-30 21:49:16,139 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-30 21:49:16,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-30 21:49:16,141 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-30 21:49:16,141 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-30 21:49:16,147 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (1/1) ... [2023-08-30 21:49:16,159 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (1/1) ... [2023-08-30 21:49:16,178 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2023-08-30 21:49:16,179 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-30 21:49:16,180 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-30 21:49:16,181 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-30 21:49:16,181 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-08-30 21:49:16,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (1/1) ... [2023-08-30 21:49:16,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (1/1) ... [2023-08-30 21:49:16,198 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (1/1) ... [2023-08-30 21:49:16,199 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (1/1) ... [2023-08-30 21:49:16,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (1/1) ... [2023-08-30 21:49:16,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (1/1) ... [2023-08-30 21:49:16,214 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (1/1) ... [2023-08-30 21:49:16,218 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (1/1) ... [2023-08-30 21:49:16,219 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-30 21:49:16,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-30 21:49:16,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-08-30 21:49:16,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-08-30 21:49:16,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (1/1) ... [2023-08-30 21:49:16,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-30 21:49:16,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:16,250 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-30 21:49:16,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-30 21:49:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-30 21:49:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-30 21:49:16,291 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-30 21:49:16,291 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-30 21:49:16,292 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-30 21:49:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-30 21:49:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-30 21:49:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-30 21:49:16,292 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-30 21:49:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-30 21:49:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-30 21:49:16,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-30 21:49:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-30 21:49:16,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-30 21:49:16,295 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-30 21:49:16,380 INFO L236 CfgBuilder]: Building ICFG [2023-08-30 21:49:16,382 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-30 21:49:16,516 INFO L277 CfgBuilder]: Performing block encoding [2023-08-30 21:49:16,521 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-30 21:49:16,522 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-08-30 21:49:16,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:49:16 BoogieIcfgContainer [2023-08-30 21:49:16,524 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-30 21:49:16,525 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-30 21:49:16,525 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-08-30 21:49:16,528 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-08-30 21:49:16,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.08 09:49:15" (1/3) ... [2023-08-30 21:49:16,535 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3cc3ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:49:16, skipping insertion in model container [2023-08-30 21:49:16,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.08 09:49:16" (2/3) ... [2023-08-30 21:49:16,536 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3cc3ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.08 09:49:16, skipping insertion in model container [2023-08-30 21:49:16,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:49:16" (3/3) ... [2023-08-30 21:49:16,537 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2023-08-30 21:49:16,556 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-30 21:49:16,564 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-30 21:49:16,564 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-30 21:49:16,565 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-30 21:49:16,660 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-08-30 21:49:16,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 81 transitions, 178 flow [2023-08-30 21:49:16,728 INFO L130 PetriNetUnfolder]: 6/79 cut-off events. [2023-08-30 21:49:16,729 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:49:16,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 79 events. 6/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 0/72 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-08-30 21:49:16,733 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 81 transitions, 178 flow [2023-08-30 21:49:16,737 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 154 flow [2023-08-30 21:49:16,740 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-30 21:49:16,749 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 72 places, 71 transitions, 154 flow [2023-08-30 21:49:16,761 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 72 places, 71 transitions, 154 flow [2023-08-30 21:49:16,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 71 transitions, 154 flow [2023-08-30 21:49:16,785 INFO L130 PetriNetUnfolder]: 6/71 cut-off events. [2023-08-30 21:49:16,785 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:49:16,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80 conditions, 71 events. 6/71 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/65 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2023-08-30 21:49:16,787 INFO L119 LiptonReduction]: Number of co-enabled transitions 572 [2023-08-30 21:49:18,526 INFO L134 LiptonReduction]: Checked pairs total: 581 [2023-08-30 21:49:18,526 INFO L136 LiptonReduction]: Total number of compositions: 66 [2023-08-30 21:49:18,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-30 21:49:18,546 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;@1d2b2c4a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-30 21:49:18,546 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-30 21:49:18,550 INFO L130 PetriNetUnfolder]: 2/14 cut-off events. [2023-08-30 21:49:18,550 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2023-08-30 21:49:18,551 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:18,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:18,551 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:18,555 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:18,555 INFO L85 PathProgramCache]: Analyzing trace with hash -69252771, now seen corresponding path program 1 times [2023-08-30 21:49:18,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:18,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069207684] [2023-08-30 21:49:18,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:18,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:19,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:19,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:19,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069207684] [2023-08-30 21:49:19,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069207684] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:19,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:19,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:19,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513761964] [2023-08-30 21:49:19,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:19,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 21:49:19,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 21:49:19,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:49:19,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:19,275 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:19,275 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:19,276 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:19,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:19,428 INFO L130 PetriNetUnfolder]: 58/106 cut-off events. [2023-08-30 21:49:19,428 INFO L131 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2023-08-30 21:49:19,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 106 events. 58/106 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 248 event pairs, 11 based on Foata normal form. 1/81 useless extension candidates. Maximal degree in co-relation 180. Up to 48 conditions per place. [2023-08-30 21:49:19,434 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 26 selfloop transitions, 10 changer transitions 5/41 dead transitions. [2023-08-30 21:49:19,434 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 41 transitions, 185 flow [2023-08-30 21:49:19,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:49:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:49:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 462 transitions. [2023-08-30 21:49:19,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-08-30 21:49:19,448 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 462 transitions. [2023-08-30 21:49:19,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 462 transitions. [2023-08-30 21:49:19,450 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:19,452 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 462 transitions. [2023-08-30 21:49:19,456 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.0) internal successors, (462), 7 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:19,460 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:19,461 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:19,462 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 7 states and 462 transitions. [2023-08-30 21:49:19,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 41 transitions, 185 flow [2023-08-30 21:49:19,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 41 transitions, 171 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-30 21:49:19,467 INFO L231 Difference]: Finished difference. Result has 27 places, 24 transitions, 101 flow [2023-08-30 21:49:19,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=101, PETRI_PLACES=27, PETRI_TRANSITIONS=24} [2023-08-30 21:49:19,471 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 7 predicate places. [2023-08-30 21:49:19,471 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 24 transitions, 101 flow [2023-08-30 21:49:19,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:19,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:19,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:19,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-30 21:49:19,472 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:19,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:19,473 INFO L85 PathProgramCache]: Analyzing trace with hash 758171711, now seen corresponding path program 2 times [2023-08-30 21:49:19,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:19,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087787819] [2023-08-30 21:49:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:19,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:19,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:19,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:19,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:19,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087787819] [2023-08-30 21:49:19,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087787819] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:19,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:19,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:19,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440914865] [2023-08-30 21:49:19,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:19,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 21:49:19,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:19,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 21:49:19,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:49:19,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:19,758 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 101 flow. Second operand has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:19,758 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:19,759 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:19,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:19,928 INFO L130 PetriNetUnfolder]: 96/166 cut-off events. [2023-08-30 21:49:19,928 INFO L131 PetriNetUnfolder]: For 63/63 co-relation queries the response was YES. [2023-08-30 21:49:19,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 510 conditions, 166 events. 96/166 cut-off events. For 63/63 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 476 event pairs, 11 based on Foata normal form. 1/167 useless extension candidates. Maximal degree in co-relation 499. Up to 69 conditions per place. [2023-08-30 21:49:19,933 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 39 selfloop transitions, 14 changer transitions 5/58 dead transitions. [2023-08-30 21:49:19,933 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 58 transitions, 333 flow [2023-08-30 21:49:19,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:49:19,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:49:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 470 transitions. [2023-08-30 21:49:19,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45675413022351796 [2023-08-30 21:49:19,940 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 470 transitions. [2023-08-30 21:49:19,940 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 470 transitions. [2023-08-30 21:49:19,941 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:19,941 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 470 transitions. [2023-08-30 21:49:19,942 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 67.14285714285714) internal successors, (470), 7 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:19,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:19,945 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:19,945 INFO L175 Difference]: Start difference. First operand has 27 places, 24 transitions, 101 flow. Second operand 7 states and 470 transitions. [2023-08-30 21:49:19,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 58 transitions, 333 flow [2023-08-30 21:49:19,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 58 transitions, 325 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 21:49:19,950 INFO L231 Difference]: Finished difference. Result has 36 places, 33 transitions, 198 flow [2023-08-30 21:49:19,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=198, PETRI_PLACES=36, PETRI_TRANSITIONS=33} [2023-08-30 21:49:19,951 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 16 predicate places. [2023-08-30 21:49:19,951 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 33 transitions, 198 flow [2023-08-30 21:49:19,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:19,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:19,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:19,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-30 21:49:19,952 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:19,955 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:19,955 INFO L85 PathProgramCache]: Analyzing trace with hash 649780581, now seen corresponding path program 3 times [2023-08-30 21:49:19,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:19,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427649034] [2023-08-30 21:49:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:19,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:20,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:20,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427649034] [2023-08-30 21:49:20,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427649034] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:20,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:20,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:20,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536268375] [2023-08-30 21:49:20,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:20,144 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 21:49:20,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:20,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 21:49:20,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:49:20,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 147 [2023-08-30 21:49:20,212 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 33 transitions, 198 flow. Second operand has 7 states, 7 states have (on average 60.857142857142854) internal successors, (426), 7 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,212 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:20,212 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 147 [2023-08-30 21:49:20,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:20,362 INFO L130 PetriNetUnfolder]: 112/190 cut-off events. [2023-08-30 21:49:20,362 INFO L131 PetriNetUnfolder]: For 270/270 co-relation queries the response was YES. [2023-08-30 21:49:20,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 768 conditions, 190 events. 112/190 cut-off events. For 270/270 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 533 event pairs, 12 based on Foata normal form. 1/191 useless extension candidates. Maximal degree in co-relation 752. Up to 108 conditions per place. [2023-08-30 21:49:20,364 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 33 selfloop transitions, 21 changer transitions 6/60 dead transitions. [2023-08-30 21:49:20,364 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 60 transitions, 460 flow [2023-08-30 21:49:20,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:49:20,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:49:20,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 454 transitions. [2023-08-30 21:49:20,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4412050534499514 [2023-08-30 21:49:20,368 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 454 transitions. [2023-08-30 21:49:20,368 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 454 transitions. [2023-08-30 21:49:20,369 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:20,369 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 454 transitions. [2023-08-30 21:49:20,370 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 64.85714285714286) internal successors, (454), 7 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,372 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,372 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,372 INFO L175 Difference]: Start difference. First operand has 36 places, 33 transitions, 198 flow. Second operand 7 states and 454 transitions. [2023-08-30 21:49:20,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 60 transitions, 460 flow [2023-08-30 21:49:20,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 60 transitions, 423 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-08-30 21:49:20,377 INFO L231 Difference]: Finished difference. Result has 43 places, 44 transitions, 331 flow [2023-08-30 21:49:20,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=331, PETRI_PLACES=43, PETRI_TRANSITIONS=44} [2023-08-30 21:49:20,377 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 23 predicate places. [2023-08-30 21:49:20,378 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 44 transitions, 331 flow [2023-08-30 21:49:20,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 60.857142857142854) internal successors, (426), 7 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:20,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:20,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-08-30 21:49:20,378 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:20,379 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:20,379 INFO L85 PathProgramCache]: Analyzing trace with hash -96540297, now seen corresponding path program 4 times [2023-08-30 21:49:20,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:20,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165478363] [2023-08-30 21:49:20,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:20,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:20,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:20,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165478363] [2023-08-30 21:49:20,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165478363] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:20,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:20,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:20,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531226164] [2023-08-30 21:49:20,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:20,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 21:49:20,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:20,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 21:49:20,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:49:20,573 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:20,573 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 44 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,573 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:20,574 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:20,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:20,697 INFO L130 PetriNetUnfolder]: 115/197 cut-off events. [2023-08-30 21:49:20,697 INFO L131 PetriNetUnfolder]: For 399/399 co-relation queries the response was YES. [2023-08-30 21:49:20,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 870 conditions, 197 events. 115/197 cut-off events. For 399/399 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 587 event pairs, 11 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 851. Up to 116 conditions per place. [2023-08-30 21:49:20,699 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 38 selfloop transitions, 23 changer transitions 5/66 dead transitions. [2023-08-30 21:49:20,699 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 66 transitions, 553 flow [2023-08-30 21:49:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:49:20,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:49:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 467 transitions. [2023-08-30 21:49:20,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45383867832847424 [2023-08-30 21:49:20,701 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 467 transitions. [2023-08-30 21:49:20,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 467 transitions. [2023-08-30 21:49:20,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:20,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 467 transitions. [2023-08-30 21:49:20,703 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.71428571428571) internal successors, (467), 7 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,705 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,705 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,705 INFO L175 Difference]: Start difference. First operand has 43 places, 44 transitions, 331 flow. Second operand 7 states and 467 transitions. [2023-08-30 21:49:20,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 66 transitions, 553 flow [2023-08-30 21:49:20,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 66 transitions, 527 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 21:49:20,710 INFO L231 Difference]: Finished difference. Result has 50 places, 48 transitions, 410 flow [2023-08-30 21:49:20,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=305, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=410, PETRI_PLACES=50, PETRI_TRANSITIONS=48} [2023-08-30 21:49:20,711 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 30 predicate places. [2023-08-30 21:49:20,711 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 48 transitions, 410 flow [2023-08-30 21:49:20,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:20,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:20,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-08-30 21:49:20,712 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:20,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:20,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1023964675, now seen corresponding path program 5 times [2023-08-30 21:49:20,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:20,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442280207] [2023-08-30 21:49:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:20,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:20,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:20,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:20,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442280207] [2023-08-30 21:49:20,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442280207] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:20,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:20,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:20,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869559116] [2023-08-30 21:49:20,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:20,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 21:49:20,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:20,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 21:49:20,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:49:20,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 59 out of 147 [2023-08-30 21:49:20,924 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 48 transitions, 410 flow. Second operand has 7 states, 7 states have (on average 60.857142857142854) internal successors, (426), 7 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:20,925 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:20,925 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 59 of 147 [2023-08-30 21:49:20,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:21,032 INFO L130 PetriNetUnfolder]: 121/207 cut-off events. [2023-08-30 21:49:21,033 INFO L131 PetriNetUnfolder]: For 559/559 co-relation queries the response was YES. [2023-08-30 21:49:21,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012 conditions, 207 events. 121/207 cut-off events. For 559/559 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 638 event pairs, 8 based on Foata normal form. 1/208 useless extension candidates. Maximal degree in co-relation 990. Up to 123 conditions per place. [2023-08-30 21:49:21,035 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 40 selfloop transitions, 28 changer transitions 5/73 dead transitions. [2023-08-30 21:49:21,035 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 73 transitions, 708 flow [2023-08-30 21:49:21,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:49:21,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:49:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 456 transitions. [2023-08-30 21:49:21,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44314868804664725 [2023-08-30 21:49:21,037 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 456 transitions. [2023-08-30 21:49:21,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 456 transitions. [2023-08-30 21:49:21,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:21,037 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 456 transitions. [2023-08-30 21:49:21,039 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.14285714285714) internal successors, (456), 7 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,046 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,046 INFO L175 Difference]: Start difference. First operand has 50 places, 48 transitions, 410 flow. Second operand 7 states and 456 transitions. [2023-08-30 21:49:21,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 73 transitions, 708 flow [2023-08-30 21:49:21,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 73 transitions, 646 flow, removed 7 selfloop flow, removed 4 redundant places. [2023-08-30 21:49:21,050 INFO L231 Difference]: Finished difference. Result has 55 places, 56 transitions, 530 flow [2023-08-30 21:49:21,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=530, PETRI_PLACES=55, PETRI_TRANSITIONS=56} [2023-08-30 21:49:21,051 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 35 predicate places. [2023-08-30 21:49:21,051 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 56 transitions, 530 flow [2023-08-30 21:49:21,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 60.857142857142854) internal successors, (426), 7 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:21,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:21,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-30 21:49:21,052 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:21,052 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:21,052 INFO L85 PathProgramCache]: Analyzing trace with hash -232545019, now seen corresponding path program 6 times [2023-08-30 21:49:21,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:21,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179197094] [2023-08-30 21:49:21,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:21,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:21,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:21,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179197094] [2023-08-30 21:49:21,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179197094] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:21,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:21,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:21,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582188922] [2023-08-30 21:49:21,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:21,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 21:49:21,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:21,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 21:49:21,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:49:21,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:21,226 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 56 transitions, 530 flow. Second operand has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,226 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:21,226 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:21,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:21,369 INFO L130 PetriNetUnfolder]: 126/216 cut-off events. [2023-08-30 21:49:21,370 INFO L131 PetriNetUnfolder]: For 795/795 co-relation queries the response was YES. [2023-08-30 21:49:21,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1113 conditions, 216 events. 126/216 cut-off events. For 795/795 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 654 event pairs, 18 based on Foata normal form. 1/217 useless extension candidates. Maximal degree in co-relation 1088. Up to 130 conditions per place. [2023-08-30 21:49:21,372 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 41 selfloop transitions, 29 changer transitions 5/75 dead transitions. [2023-08-30 21:49:21,372 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 781 flow [2023-08-30 21:49:21,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:49:21,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:49:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 465 transitions. [2023-08-30 21:49:21,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4518950437317784 [2023-08-30 21:49:21,375 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 465 transitions. [2023-08-30 21:49:21,375 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 465 transitions. [2023-08-30 21:49:21,375 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:21,376 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 465 transitions. [2023-08-30 21:49:21,377 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.42857142857143) internal successors, (465), 7 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,379 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,379 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,379 INFO L175 Difference]: Start difference. First operand has 55 places, 56 transitions, 530 flow. Second operand 7 states and 465 transitions. [2023-08-30 21:49:21,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 781 flow [2023-08-30 21:49:21,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 741 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-08-30 21:49:21,385 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 613 flow [2023-08-30 21:49:21,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=613, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2023-08-30 21:49:21,386 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 42 predicate places. [2023-08-30 21:49:21,386 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 613 flow [2023-08-30 21:49:21,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 61.857142857142854) internal successors, (433), 7 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:21,387 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:21,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-30 21:49:21,388 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:21,388 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:21,388 INFO L85 PathProgramCache]: Analyzing trace with hash 2077625246, now seen corresponding path program 1 times [2023-08-30 21:49:21,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:21,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100015480] [2023-08-30 21:49:21,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:21,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:21,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:21,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100015480] [2023-08-30 21:49:21,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100015480] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:21,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872718283] [2023-08-30 21:49:21,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:21,423 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:21,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:21,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:21,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-30 21:49:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:21,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 21:49:21,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:21,554 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:21,554 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:21,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:21,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872718283] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:21,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:49:21,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2023-08-30 21:49:21,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198650673] [2023-08-30 21:49:21,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:21,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:21,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:49:21,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:21,629 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 613 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,640 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:21,641 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:21,641 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:21,809 INFO L130 PetriNetUnfolder]: 131/230 cut-off events. [2023-08-30 21:49:21,809 INFO L131 PetriNetUnfolder]: For 1083/1083 co-relation queries the response was YES. [2023-08-30 21:49:21,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1252 conditions, 230 events. 131/230 cut-off events. For 1083/1083 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 750 event pairs, 10 based on Foata normal form. 8/238 useless extension candidates. Maximal degree in co-relation 1221. Up to 102 conditions per place. [2023-08-30 21:49:21,812 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 62 selfloop transitions, 18 changer transitions 0/80 dead transitions. [2023-08-30 21:49:21,812 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 80 transitions, 891 flow [2023-08-30 21:49:21,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:49:21,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:49:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2023-08-30 21:49:21,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2023-08-30 21:49:21,816 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2023-08-30 21:49:21,816 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2023-08-30 21:49:21,816 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:21,816 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2023-08-30 21:49:21,817 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,820 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,820 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 613 flow. Second operand 5 states and 340 transitions. [2023-08-30 21:49:21,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 80 transitions, 891 flow [2023-08-30 21:49:21,825 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 80 transitions, 815 flow, removed 10 selfloop flow, removed 4 redundant places. [2023-08-30 21:49:21,828 INFO L231 Difference]: Finished difference. Result has 63 places, 61 transitions, 627 flow [2023-08-30 21:49:21,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=532, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=627, PETRI_PLACES=63, PETRI_TRANSITIONS=61} [2023-08-30 21:49:21,829 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-08-30 21:49:21,829 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 61 transitions, 627 flow [2023-08-30 21:49:21,830 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:21,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:21,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:21,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:22,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:22,036 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:22,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:22,036 INFO L85 PathProgramCache]: Analyzing trace with hash -1451445671, now seen corresponding path program 1 times [2023-08-30 21:49:22,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:22,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841208310] [2023-08-30 21:49:22,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:22,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:22,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:22,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841208310] [2023-08-30 21:49:22,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841208310] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:22,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:22,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:22,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238096509] [2023-08-30 21:49:22,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:22,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:22,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:22,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:22,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:49:22,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:22,109 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 61 transitions, 627 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,109 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:22,109 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:22,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:22,211 INFO L130 PetriNetUnfolder]: 127/226 cut-off events. [2023-08-30 21:49:22,211 INFO L131 PetriNetUnfolder]: For 1366/1366 co-relation queries the response was YES. [2023-08-30 21:49:22,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1268 conditions, 226 events. 127/226 cut-off events. For 1366/1366 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 733 event pairs, 16 based on Foata normal form. 4/230 useless extension candidates. Maximal degree in co-relation 1104. Up to 90 conditions per place. [2023-08-30 21:49:22,214 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 49 selfloop transitions, 28 changer transitions 4/81 dead transitions. [2023-08-30 21:49:22,214 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 81 transitions, 873 flow [2023-08-30 21:49:22,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:49:22,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:49:22,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 466 transitions. [2023-08-30 21:49:22,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45286686103012636 [2023-08-30 21:49:22,216 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 466 transitions. [2023-08-30 21:49:22,216 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 466 transitions. [2023-08-30 21:49:22,217 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:22,217 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 466 transitions. [2023-08-30 21:49:22,218 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 66.57142857142857) internal successors, (466), 7 states have internal predecessors, (466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,219 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,220 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,220 INFO L175 Difference]: Start difference. First operand has 63 places, 61 transitions, 627 flow. Second operand 7 states and 466 transitions. [2023-08-30 21:49:22,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 81 transitions, 873 flow [2023-08-30 21:49:22,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 830 flow, removed 9 selfloop flow, removed 3 redundant places. [2023-08-30 21:49:22,227 INFO L231 Difference]: Finished difference. Result has 67 places, 59 transitions, 639 flow [2023-08-30 21:49:22,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=639, PETRI_PLACES=67, PETRI_TRANSITIONS=59} [2023-08-30 21:49:22,228 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 47 predicate places. [2023-08-30 21:49:22,228 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 59 transitions, 639 flow [2023-08-30 21:49:22,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:22,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:22,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-08-30 21:49:22,229 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:22,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:22,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1729374333, now seen corresponding path program 2 times [2023-08-30 21:49:22,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:22,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264252343] [2023-08-30 21:49:22,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:22,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:22,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:22,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:22,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264252343] [2023-08-30 21:49:22,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264252343] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:22,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:22,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:22,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741776557] [2023-08-30 21:49:22,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:22,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:22,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:22,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:22,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:49:22,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:22,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 59 transitions, 639 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:22,309 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:22,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:22,410 INFO L130 PetriNetUnfolder]: 133/236 cut-off events. [2023-08-30 21:49:22,410 INFO L131 PetriNetUnfolder]: For 1381/1381 co-relation queries the response was YES. [2023-08-30 21:49:22,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358 conditions, 236 events. 133/236 cut-off events. For 1381/1381 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 757 event pairs, 23 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 1261. Up to 133 conditions per place. [2023-08-30 21:49:22,412 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 62 selfloop transitions, 18 changer transitions 0/80 dead transitions. [2023-08-30 21:49:22,412 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 80 transitions, 916 flow [2023-08-30 21:49:22,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:49:22,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:49:22,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 343 transitions. [2023-08-30 21:49:22,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2023-08-30 21:49:22,414 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 343 transitions. [2023-08-30 21:49:22,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 343 transitions. [2023-08-30 21:49:22,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:22,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 343 transitions. [2023-08-30 21:49:22,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.6) internal successors, (343), 5 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,417 INFO L175 Difference]: Start difference. First operand has 67 places, 59 transitions, 639 flow. Second operand 5 states and 343 transitions. [2023-08-30 21:49:22,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 80 transitions, 916 flow [2023-08-30 21:49:22,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 837 flow, removed 12 selfloop flow, removed 5 redundant places. [2023-08-30 21:49:22,423 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 639 flow [2023-08-30 21:49:22,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=576, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=639, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2023-08-30 21:49:22,424 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 46 predicate places. [2023-08-30 21:49:22,424 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 639 flow [2023-08-30 21:49:22,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:22,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:22,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-30 21:49:22,425 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:22,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:22,425 INFO L85 PathProgramCache]: Analyzing trace with hash 2096697363, now seen corresponding path program 3 times [2023-08-30 21:49:22,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:22,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111361342] [2023-08-30 21:49:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:22,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:22,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:22,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111361342] [2023-08-30 21:49:22,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111361342] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:22,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:22,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:22,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280038495] [2023-08-30 21:49:22,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:22,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:22,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:22,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:22,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:49:22,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:22,497 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 639 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,497 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:22,497 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:22,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:22,605 INFO L130 PetriNetUnfolder]: 128/231 cut-off events. [2023-08-30 21:49:22,605 INFO L131 PetriNetUnfolder]: For 1179/1179 co-relation queries the response was YES. [2023-08-30 21:49:22,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1298 conditions, 231 events. 128/231 cut-off events. For 1179/1179 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 749 event pairs, 16 based on Foata normal form. 4/235 useless extension candidates. Maximal degree in co-relation 1179. Up to 92 conditions per place. [2023-08-30 21:49:22,608 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 58 selfloop transitions, 28 changer transitions 3/89 dead transitions. [2023-08-30 21:49:22,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 89 transitions, 942 flow [2023-08-30 21:49:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 21:49:22,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 21:49:22,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 535 transitions. [2023-08-30 21:49:22,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4549319727891156 [2023-08-30 21:49:22,610 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 535 transitions. [2023-08-30 21:49:22,610 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 535 transitions. [2023-08-30 21:49:22,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:22,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 535 transitions. [2023-08-30 21:49:22,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 66.875) internal successors, (535), 8 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,614 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,614 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 639 flow. Second operand 8 states and 535 transitions. [2023-08-30 21:49:22,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 89 transitions, 942 flow [2023-08-30 21:49:22,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 89 transitions, 908 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-08-30 21:49:22,621 INFO L231 Difference]: Finished difference. Result has 71 places, 61 transitions, 676 flow [2023-08-30 21:49:22,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=676, PETRI_PLACES=71, PETRI_TRANSITIONS=61} [2023-08-30 21:49:22,622 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 51 predicate places. [2023-08-30 21:49:22,622 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 61 transitions, 676 flow [2023-08-30 21:49:22,623 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:22,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:22,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-30 21:49:22,623 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:22,623 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:22,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1833085128, now seen corresponding path program 2 times [2023-08-30 21:49:22,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:22,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727538268] [2023-08-30 21:49:22,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:22,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:22,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:22,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:22,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:22,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727538268] [2023-08-30 21:49:22,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727538268] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:22,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:22,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:22,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070519403] [2023-08-30 21:49:22,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:22,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:22,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:22,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:22,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:49:22,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:22,695 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 61 transitions, 676 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,695 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:22,696 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:22,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:22,787 INFO L130 PetriNetUnfolder]: 145/268 cut-off events. [2023-08-30 21:49:22,787 INFO L131 PetriNetUnfolder]: For 1492/1492 co-relation queries the response was YES. [2023-08-30 21:49:22,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1520 conditions, 268 events. 145/268 cut-off events. For 1492/1492 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 935 event pairs, 10 based on Foata normal form. 4/272 useless extension candidates. Maximal degree in co-relation 1445. Up to 103 conditions per place. [2023-08-30 21:49:22,790 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 56 selfloop transitions, 26 changer transitions 1/83 dead transitions. [2023-08-30 21:49:22,790 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 83 transitions, 989 flow [2023-08-30 21:49:22,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:49:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:49:22,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 401 transitions. [2023-08-30 21:49:22,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546485260770975 [2023-08-30 21:49:22,792 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 401 transitions. [2023-08-30 21:49:22,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 401 transitions. [2023-08-30 21:49:22,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:22,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 401 transitions. [2023-08-30 21:49:22,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.83333333333333) internal successors, (401), 6 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,795 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,795 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,796 INFO L175 Difference]: Start difference. First operand has 71 places, 61 transitions, 676 flow. Second operand 6 states and 401 transitions. [2023-08-30 21:49:22,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 83 transitions, 989 flow [2023-08-30 21:49:22,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 83 transitions, 931 flow, removed 9 selfloop flow, removed 4 redundant places. [2023-08-30 21:49:22,802 INFO L231 Difference]: Finished difference. Result has 75 places, 64 transitions, 767 flow [2023-08-30 21:49:22,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=767, PETRI_PLACES=75, PETRI_TRANSITIONS=64} [2023-08-30 21:49:22,803 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-08-30 21:49:22,803 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 64 transitions, 767 flow [2023-08-30 21:49:22,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:22,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:22,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-30 21:49:22,804 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:22,805 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:22,805 INFO L85 PathProgramCache]: Analyzing trace with hash 1631307914, now seen corresponding path program 3 times [2023-08-30 21:49:22,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:22,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264355530] [2023-08-30 21:49:22,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:22,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:22,834 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:22,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:22,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264355530] [2023-08-30 21:49:22,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264355530] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:22,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34210758] [2023-08-30 21:49:22,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:49:22,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:22,836 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:22,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:22,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-30 21:49:22,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-08-30 21:49:22,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:49:22,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 21:49:22,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:22,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:22,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:22,952 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:22,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34210758] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:22,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:49:22,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-08-30 21:49:22,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815246030] [2023-08-30 21:49:22,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:22,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:22,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:22,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:22,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:49:22,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:22,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 64 transitions, 767 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:22,981 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:22,981 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:22,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:23,086 INFO L130 PetriNetUnfolder]: 150/281 cut-off events. [2023-08-30 21:49:23,086 INFO L131 PetriNetUnfolder]: For 1865/1865 co-relation queries the response was YES. [2023-08-30 21:49:23,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609 conditions, 281 events. 150/281 cut-off events. For 1865/1865 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1012 event pairs, 6 based on Foata normal form. 6/287 useless extension candidates. Maximal degree in co-relation 1535. Up to 163 conditions per place. [2023-08-30 21:49:23,089 INFO L137 encePairwiseOnDemand]: 140/147 looper letters, 54 selfloop transitions, 29 changer transitions 0/83 dead transitions. [2023-08-30 21:49:23,089 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 83 transitions, 1014 flow [2023-08-30 21:49:23,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:49:23,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:49:23,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 340 transitions. [2023-08-30 21:49:23,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2023-08-30 21:49:23,091 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 340 transitions. [2023-08-30 21:49:23,091 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 340 transitions. [2023-08-30 21:49:23,091 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:23,091 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 340 transitions. [2023-08-30 21:49:23,092 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 68.0) internal successors, (340), 5 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,093 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,093 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,094 INFO L175 Difference]: Start difference. First operand has 75 places, 64 transitions, 767 flow. Second operand 5 states and 340 transitions. [2023-08-30 21:49:23,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 83 transitions, 1014 flow [2023-08-30 21:49:23,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 83 transitions, 945 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-08-30 21:49:23,102 INFO L231 Difference]: Finished difference. Result has 76 places, 66 transitions, 819 flow [2023-08-30 21:49:23,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=819, PETRI_PLACES=76, PETRI_TRANSITIONS=66} [2023-08-30 21:49:23,104 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 56 predicate places. [2023-08-30 21:49:23,104 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 66 transitions, 819 flow [2023-08-30 21:49:23,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:23,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:23,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-30 21:49:23,311 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,SelfDestructingSolverStorable11 [2023-08-30 21:49:23,311 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:23,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:23,312 INFO L85 PathProgramCache]: Analyzing trace with hash 199479147, now seen corresponding path program 4 times [2023-08-30 21:49:23,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:23,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644566363] [2023-08-30 21:49:23,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:23,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:23,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:23,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:23,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644566363] [2023-08-30 21:49:23,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644566363] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:23,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915942845] [2023-08-30 21:49:23,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:49:23,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:23,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:23,355 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:23,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-30 21:49:23,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:49:23,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:49:23,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 21:49:23,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:23,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:23,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:23,439 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:23,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915942845] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:23,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:49:23,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2023-08-30 21:49:23,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599614464] [2023-08-30 21:49:23,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:23,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:23,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:23,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:23,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-08-30 21:49:23,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:23,463 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 66 transitions, 819 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,463 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:23,463 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:23,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:23,542 INFO L130 PetriNetUnfolder]: 159/310 cut-off events. [2023-08-30 21:49:23,542 INFO L131 PetriNetUnfolder]: For 2376/2376 co-relation queries the response was YES. [2023-08-30 21:49:23,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1809 conditions, 310 events. 159/310 cut-off events. For 2376/2376 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1194 event pairs, 10 based on Foata normal form. 6/316 useless extension candidates. Maximal degree in co-relation 1720. Up to 160 conditions per place. [2023-08-30 21:49:23,545 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 63 selfloop transitions, 22 changer transitions 0/85 dead transitions. [2023-08-30 21:49:23,545 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 85 transitions, 1111 flow [2023-08-30 21:49:23,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:49:23,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:49:23,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 336 transitions. [2023-08-30 21:49:23,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2023-08-30 21:49:23,546 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 336 transitions. [2023-08-30 21:49:23,547 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 336 transitions. [2023-08-30 21:49:23,547 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:23,547 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 336 transitions. [2023-08-30 21:49:23,548 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 67.2) internal successors, (336), 5 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,549 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,549 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,549 INFO L175 Difference]: Start difference. First operand has 76 places, 66 transitions, 819 flow. Second operand 5 states and 336 transitions. [2023-08-30 21:49:23,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 85 transitions, 1111 flow [2023-08-30 21:49:23,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 1098 flow, removed 4 selfloop flow, removed 1 redundant places. [2023-08-30 21:49:23,577 INFO L231 Difference]: Finished difference. Result has 81 places, 69 transitions, 906 flow [2023-08-30 21:49:23,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=906, PETRI_PLACES=81, PETRI_TRANSITIONS=69} [2023-08-30 21:49:23,578 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 61 predicate places. [2023-08-30 21:49:23,578 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 69 transitions, 906 flow [2023-08-30 21:49:23,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:23,579 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:23,587 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:23,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:23,785 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:23,785 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:23,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1851774549, now seen corresponding path program 5 times [2023-08-30 21:49:23,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:23,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481896440] [2023-08-30 21:49:23,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:23,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:23,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:23,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:23,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:23,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481896440] [2023-08-30 21:49:23,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481896440] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:23,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:23,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:23,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611484406] [2023-08-30 21:49:23,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:23,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:23,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:23,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:23,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:49:23,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:23,862 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 69 transitions, 906 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,862 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:23,862 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:23,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:23,959 INFO L130 PetriNetUnfolder]: 145/286 cut-off events. [2023-08-30 21:49:23,959 INFO L131 PetriNetUnfolder]: For 2486/2486 co-relation queries the response was YES. [2023-08-30 21:49:23,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1783 conditions, 286 events. 145/286 cut-off events. For 2486/2486 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1079 event pairs, 10 based on Foata normal form. 8/294 useless extension candidates. Maximal degree in co-relation 1686. Up to 115 conditions per place. [2023-08-30 21:49:23,962 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 60 selfloop transitions, 25 changer transitions 1/86 dead transitions. [2023-08-30 21:49:23,962 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 1172 flow [2023-08-30 21:49:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:49:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:49:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 401 transitions. [2023-08-30 21:49:23,964 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4546485260770975 [2023-08-30 21:49:23,964 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 401 transitions. [2023-08-30 21:49:23,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 401 transitions. [2023-08-30 21:49:23,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:23,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 401 transitions. [2023-08-30 21:49:23,965 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 66.83333333333333) internal successors, (401), 6 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,967 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,967 INFO L175 Difference]: Start difference. First operand has 81 places, 69 transitions, 906 flow. Second operand 6 states and 401 transitions. [2023-08-30 21:49:23,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 1172 flow [2023-08-30 21:49:23,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 1128 flow, removed 6 selfloop flow, removed 4 redundant places. [2023-08-30 21:49:23,976 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 915 flow [2023-08-30 21:49:23,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=853, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=915, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2023-08-30 21:49:23,976 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 64 predicate places. [2023-08-30 21:49:23,977 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 915 flow [2023-08-30 21:49:23,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:23,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:23,977 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:23,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-08-30 21:49:23,977 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:23,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:23,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1933318608, now seen corresponding path program 4 times [2023-08-30 21:49:23,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:23,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563854906] [2023-08-30 21:49:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:23,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:24,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:24,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:24,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563854906] [2023-08-30 21:49:24,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563854906] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:24,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289388492] [2023-08-30 21:49:24,009 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:49:24,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:24,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:24,010 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:24,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-30 21:49:24,070 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:49:24,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:49:24,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-30 21:49:24,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:24,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:24,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:24,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289388492] provided 1 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:24,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-08-30 21:49:24,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2023-08-30 21:49:24,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400823894] [2023-08-30 21:49:24,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:24,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:24,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:24,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:24,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-08-30 21:49:24,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:24,134 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 915 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,135 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:24,135 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:24,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:24,222 INFO L130 PetriNetUnfolder]: 139/272 cut-off events. [2023-08-30 21:49:24,222 INFO L131 PetriNetUnfolder]: For 2565/2565 co-relation queries the response was YES. [2023-08-30 21:49:24,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1736 conditions, 272 events. 139/272 cut-off events. For 2565/2565 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 998 event pairs, 23 based on Foata normal form. 6/278 useless extension candidates. Maximal degree in co-relation 1618. Up to 145 conditions per place. [2023-08-30 21:49:24,225 INFO L137 encePairwiseOnDemand]: 140/147 looper letters, 58 selfloop transitions, 31 changer transitions 0/89 dead transitions. [2023-08-30 21:49:24,225 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 89 transitions, 1175 flow [2023-08-30 21:49:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-30 21:49:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-30 21:49:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 408 transitions. [2023-08-30 21:49:24,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2023-08-30 21:49:24,226 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 408 transitions. [2023-08-30 21:49:24,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 408 transitions. [2023-08-30 21:49:24,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:24,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 408 transitions. [2023-08-30 21:49:24,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 68.0) internal successors, (408), 6 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,229 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,229 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 147.0) internal successors, (1029), 7 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,229 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 915 flow. Second operand 6 states and 408 transitions. [2023-08-30 21:49:24,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 89 transitions, 1175 flow [2023-08-30 21:49:24,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 89 transitions, 1152 flow, removed 4 selfloop flow, removed 3 redundant places. [2023-08-30 21:49:24,238 INFO L231 Difference]: Finished difference. Result has 86 places, 69 transitions, 967 flow [2023-08-30 21:49:24,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=967, PETRI_PLACES=86, PETRI_TRANSITIONS=69} [2023-08-30 21:49:24,238 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 66 predicate places. [2023-08-30 21:49:24,239 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 69 transitions, 967 flow [2023-08-30 21:49:24,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:24,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:24,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:24,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-30 21:49:24,444 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:24,445 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:24,445 INFO L85 PathProgramCache]: Analyzing trace with hash 58117330, now seen corresponding path program 5 times [2023-08-30 21:49:24,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:24,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174740812] [2023-08-30 21:49:24,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:24,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:24,476 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:24,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:24,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174740812] [2023-08-30 21:49:24,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174740812] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:24,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:24,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:24,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965452283] [2023-08-30 21:49:24,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:24,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:24,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:24,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:24,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:49:24,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:24,506 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 69 transitions, 967 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,506 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:24,506 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:24,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:24,594 INFO L130 PetriNetUnfolder]: 137/270 cut-off events. [2023-08-30 21:49:24,594 INFO L131 PetriNetUnfolder]: For 2647/2647 co-relation queries the response was YES. [2023-08-30 21:49:24,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1787 conditions, 270 events. 137/270 cut-off events. For 2647/2647 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 994 event pairs, 27 based on Foata normal form. 2/272 useless extension candidates. Maximal degree in co-relation 1721. Up to 101 conditions per place. [2023-08-30 21:49:24,596 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 54 selfloop transitions, 27 changer transitions 2/83 dead transitions. [2023-08-30 21:49:24,597 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 83 transitions, 1184 flow [2023-08-30 21:49:24,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:49:24,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:49:24,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 461 transitions. [2023-08-30 21:49:24,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4480077745383868 [2023-08-30 21:49:24,598 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 461 transitions. [2023-08-30 21:49:24,599 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 461 transitions. [2023-08-30 21:49:24,599 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:24,599 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 461 transitions. [2023-08-30 21:49:24,600 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.85714285714286) internal successors, (461), 7 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,601 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,602 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,602 INFO L175 Difference]: Start difference. First operand has 86 places, 69 transitions, 967 flow. Second operand 7 states and 461 transitions. [2023-08-30 21:49:24,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 83 transitions, 1184 flow [2023-08-30 21:49:24,610 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 83 transitions, 1138 flow, removed 6 selfloop flow, removed 2 redundant places. [2023-08-30 21:49:24,611 INFO L231 Difference]: Finished difference. Result has 90 places, 66 transitions, 932 flow [2023-08-30 21:49:24,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=909, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=932, PETRI_PLACES=90, PETRI_TRANSITIONS=66} [2023-08-30 21:49:24,612 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 70 predicate places. [2023-08-30 21:49:24,612 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 66 transitions, 932 flow [2023-08-30 21:49:24,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,612 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:24,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:24,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-30 21:49:24,613 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:24,613 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:24,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1486589744, now seen corresponding path program 6 times [2023-08-30 21:49:24,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:24,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425309512] [2023-08-30 21:49:24,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:24,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:24,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:24,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:24,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425309512] [2023-08-30 21:49:24,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425309512] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:24,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:24,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:24,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355539301] [2023-08-30 21:49:24,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:24,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:24,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:24,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:24,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:49:24,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:24,670 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 66 transitions, 932 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,670 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:24,670 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:24,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:24,775 INFO L130 PetriNetUnfolder]: 131/252 cut-off events. [2023-08-30 21:49:24,776 INFO L131 PetriNetUnfolder]: For 2667/2667 co-relation queries the response was YES. [2023-08-30 21:49:24,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1703 conditions, 252 events. 131/252 cut-off events. For 2667/2667 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 891 event pairs, 23 based on Foata normal form. 2/254 useless extension candidates. Maximal degree in co-relation 1659. Up to 101 conditions per place. [2023-08-30 21:49:24,778 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 55 selfloop transitions, 27 changer transitions 1/83 dead transitions. [2023-08-30 21:49:24,778 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 83 transitions, 1156 flow [2023-08-30 21:49:24,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-30 21:49:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-30 21:49:24,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 527 transitions. [2023-08-30 21:49:24,782 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481292517006803 [2023-08-30 21:49:24,782 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 527 transitions. [2023-08-30 21:49:24,782 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 527 transitions. [2023-08-30 21:49:24,783 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:24,783 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 527 transitions. [2023-08-30 21:49:24,784 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 65.875) internal successors, (527), 8 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,786 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,786 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 147.0) internal successors, (1323), 9 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,786 INFO L175 Difference]: Start difference. First operand has 90 places, 66 transitions, 932 flow. Second operand 8 states and 527 transitions. [2023-08-30 21:49:24,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 83 transitions, 1156 flow [2023-08-30 21:49:24,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 83 transitions, 1106 flow, removed 6 selfloop flow, removed 3 redundant places. [2023-08-30 21:49:24,796 INFO L231 Difference]: Finished difference. Result has 92 places, 63 transitions, 888 flow [2023-08-30 21:49:24,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=888, PETRI_PLACES=92, PETRI_TRANSITIONS=63} [2023-08-30 21:49:24,796 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 72 predicate places. [2023-08-30 21:49:24,796 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 63 transitions, 888 flow [2023-08-30 21:49:24,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:24,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:24,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-30 21:49:24,799 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:24,799 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:24,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1093501371, now seen corresponding path program 6 times [2023-08-30 21:49:24,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:24,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910096900] [2023-08-30 21:49:24,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:24,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:24,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:24,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:24,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910096900] [2023-08-30 21:49:24,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910096900] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:24,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-30 21:49:24,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-08-30 21:49:24,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604478697] [2023-08-30 21:49:24,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:24,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-30 21:49:24,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:24,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-30 21:49:24,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-08-30 21:49:24,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 60 out of 147 [2023-08-30 21:49:24,866 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 63 transitions, 888 flow. Second operand has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,866 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:24,866 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 60 of 147 [2023-08-30 21:49:24,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:24,944 INFO L130 PetriNetUnfolder]: 125/236 cut-off events. [2023-08-30 21:49:24,944 INFO L131 PetriNetUnfolder]: For 2604/2604 co-relation queries the response was YES. [2023-08-30 21:49:24,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1628 conditions, 236 events. 125/236 cut-off events. For 2604/2604 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 783 event pairs, 10 based on Foata normal form. 4/240 useless extension candidates. Maximal degree in co-relation 1461. Up to 173 conditions per place. [2023-08-30 21:49:24,947 INFO L137 encePairwiseOnDemand]: 142/147 looper letters, 50 selfloop transitions, 18 changer transitions 0/68 dead transitions. [2023-08-30 21:49:24,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 68 transitions, 1010 flow [2023-08-30 21:49:24,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-30 21:49:24,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-30 21:49:24,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 330 transitions. [2023-08-30 21:49:24,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4489795918367347 [2023-08-30 21:49:24,950 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 330 transitions. [2023-08-30 21:49:24,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 330 transitions. [2023-08-30 21:49:24,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:24,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 330 transitions. [2023-08-30 21:49:24,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 66.0) internal successors, (330), 5 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,953 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 147.0) internal successors, (882), 6 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,953 INFO L175 Difference]: Start difference. First operand has 92 places, 63 transitions, 888 flow. Second operand 5 states and 330 transitions. [2023-08-30 21:49:24,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 68 transitions, 1010 flow [2023-08-30 21:49:24,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 68 transitions, 950 flow, removed 1 selfloop flow, removed 7 redundant places. [2023-08-30 21:49:24,960 INFO L231 Difference]: Finished difference. Result has 85 places, 61 transitions, 815 flow [2023-08-30 21:49:24,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=815, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2023-08-30 21:49:24,961 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 65 predicate places. [2023-08-30 21:49:24,962 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 815 flow [2023-08-30 21:49:24,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:24,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:24,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:24,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-30 21:49:24,963 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:24,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:24,963 INFO L85 PathProgramCache]: Analyzing trace with hash 1299106536, now seen corresponding path program 1 times [2023-08-30 21:49:24,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:24,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103563902] [2023-08-30 21:49:24,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:24,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:24,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:25,104 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:25,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:25,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103563902] [2023-08-30 21:49:25,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103563902] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:25,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074101088] [2023-08-30 21:49:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:25,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:25,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:25,109 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:25,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-30 21:49:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:25,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 21:49:25,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:25,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:25,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:25,627 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:25,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074101088] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:49:25,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:49:25,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 21:49:25,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855403698] [2023-08-30 21:49:25,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:49:25,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:49:25,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:25,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:49:25,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-08-30 21:49:25,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 147 [2023-08-30 21:49:25,775 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 815 flow. Second operand has 18 states, 18 states have (on average 58.94444444444444) internal successors, (1061), 18 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:25,775 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:25,775 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 147 [2023-08-30 21:49:25,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:26,095 INFO L130 PetriNetUnfolder]: 125/235 cut-off events. [2023-08-30 21:49:26,096 INFO L131 PetriNetUnfolder]: For 2124/2124 co-relation queries the response was YES. [2023-08-30 21:49:26,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1574 conditions, 235 events. 125/235 cut-off events. For 2124/2124 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 793 event pairs, 2 based on Foata normal form. 1/236 useless extension candidates. Maximal degree in co-relation 1359. Up to 51 conditions per place. [2023-08-30 21:49:26,098 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 42 selfloop transitions, 22 changer transitions 27/91 dead transitions. [2023-08-30 21:49:26,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 1145 flow [2023-08-30 21:49:26,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 21:49:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 21:49:26,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 686 transitions. [2023-08-30 21:49:26,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2023-08-30 21:49:26,103 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 686 transitions. [2023-08-30 21:49:26,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 686 transitions. [2023-08-30 21:49:26,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:26,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 686 transitions. [2023-08-30 21:49:26,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 62.36363636363637) internal successors, (686), 11 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:26,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:26,111 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:26,111 INFO L175 Difference]: Start difference. First operand has 85 places, 61 transitions, 815 flow. Second operand 11 states and 686 transitions. [2023-08-30 21:49:26,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 1145 flow [2023-08-30 21:49:26,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 91 transitions, 1120 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-30 21:49:26,119 INFO L231 Difference]: Finished difference. Result has 94 places, 48 transitions, 666 flow [2023-08-30 21:49:26,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=666, PETRI_PLACES=94, PETRI_TRANSITIONS=48} [2023-08-30 21:49:26,120 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 74 predicate places. [2023-08-30 21:49:26,120 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 48 transitions, 666 flow [2023-08-30 21:49:26,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.94444444444444) internal successors, (1061), 18 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:26,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:26,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:26,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:26,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:26,327 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:26,327 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:26,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1701107400, now seen corresponding path program 2 times [2023-08-30 21:49:26,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:26,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486780518] [2023-08-30 21:49:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:26,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:26,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:26,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:26,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486780518] [2023-08-30 21:49:26,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486780518] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:26,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022246131] [2023-08-30 21:49:26,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:49:26,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:26,529 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:26,533 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:26,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-30 21:49:26,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:49:26,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:49:26,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 21:49:26,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:26,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:26,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:26,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022246131] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:49:26,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:49:26,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-08-30 21:49:26,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889053334] [2023-08-30 21:49:26,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:49:26,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:49:26,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:26,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:49:26,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:49:27,207 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 147 [2023-08-30 21:49:27,208 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 48 transitions, 666 flow. Second operand has 20 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:27,208 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:27,208 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 147 [2023-08-30 21:49:27,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:27,489 INFO L130 PetriNetUnfolder]: 96/188 cut-off events. [2023-08-30 21:49:27,490 INFO L131 PetriNetUnfolder]: For 1913/1913 co-relation queries the response was YES. [2023-08-30 21:49:27,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1293 conditions, 188 events. 96/188 cut-off events. For 1913/1913 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 580 event pairs, 2 based on Foata normal form. 1/189 useless extension candidates. Maximal degree in co-relation 1258. Up to 46 conditions per place. [2023-08-30 21:49:27,496 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 46 selfloop transitions, 27 changer transitions 9/82 dead transitions. [2023-08-30 21:49:27,497 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 82 transitions, 1049 flow [2023-08-30 21:49:27,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 21:49:27,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 21:49:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 652 transitions. [2023-08-30 21:49:27,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40321583178726034 [2023-08-30 21:49:27,502 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 652 transitions. [2023-08-30 21:49:27,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 652 transitions. [2023-08-30 21:49:27,504 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:27,505 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 652 transitions. [2023-08-30 21:49:27,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 59.27272727272727) internal successors, (652), 11 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:27,508 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:27,508 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:27,508 INFO L175 Difference]: Start difference. First operand has 94 places, 48 transitions, 666 flow. Second operand 11 states and 652 transitions. [2023-08-30 21:49:27,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 82 transitions, 1049 flow [2023-08-30 21:49:27,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 82 transitions, 837 flow, removed 15 selfloop flow, removed 20 redundant places. [2023-08-30 21:49:27,515 INFO L231 Difference]: Finished difference. Result has 79 places, 51 transitions, 593 flow [2023-08-30 21:49:27,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=486, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=593, PETRI_PLACES=79, PETRI_TRANSITIONS=51} [2023-08-30 21:49:27,517 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 59 predicate places. [2023-08-30 21:49:27,518 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 51 transitions, 593 flow [2023-08-30 21:49:27,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:27,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:27,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:27,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:27,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:27,735 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:27,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:27,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1717886460, now seen corresponding path program 3 times [2023-08-30 21:49:27,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:27,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376800163] [2023-08-30 21:49:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:27,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:27,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:27,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376800163] [2023-08-30 21:49:27,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376800163] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:27,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409589793] [2023-08-30 21:49:27,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-08-30 21:49:27,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:27,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:27,862 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:27,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-30 21:49:27,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-08-30 21:49:27,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:49:27,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 21:49:27,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:28,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:28,301 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:28,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409589793] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:49:28,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:49:28,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 21:49:28,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851180518] [2023-08-30 21:49:28,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:49:28,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:49:28,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:49:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:49:28,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 147 [2023-08-30 21:49:28,503 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 51 transitions, 593 flow. Second operand has 19 states, 19 states have (on average 58.421052631578945) internal successors, (1110), 19 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:28,503 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:28,503 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 147 [2023-08-30 21:49:28,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:28,762 INFO L130 PetriNetUnfolder]: 90/183 cut-off events. [2023-08-30 21:49:28,762 INFO L131 PetriNetUnfolder]: For 1103/1103 co-relation queries the response was YES. [2023-08-30 21:49:28,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1111 conditions, 183 events. 90/183 cut-off events. For 1103/1103 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 572 event pairs, 2 based on Foata normal form. 2/185 useless extension candidates. Maximal degree in co-relation 1079. Up to 45 conditions per place. [2023-08-30 21:49:28,764 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 34 selfloop transitions, 16 changer transitions 26/76 dead transitions. [2023-08-30 21:49:28,764 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 76 transitions, 870 flow [2023-08-30 21:49:28,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 21:49:28,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 21:49:28,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 679 transitions. [2023-08-30 21:49:28,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4199134199134199 [2023-08-30 21:49:28,766 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 679 transitions. [2023-08-30 21:49:28,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 679 transitions. [2023-08-30 21:49:28,766 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:28,766 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 679 transitions. [2023-08-30 21:49:28,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 61.72727272727273) internal successors, (679), 11 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:28,771 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:28,771 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:28,771 INFO L175 Difference]: Start difference. First operand has 79 places, 51 transitions, 593 flow. Second operand 11 states and 679 transitions. [2023-08-30 21:49:28,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 76 transitions, 870 flow [2023-08-30 21:49:28,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 793 flow, removed 13 selfloop flow, removed 8 redundant places. [2023-08-30 21:49:28,777 INFO L231 Difference]: Finished difference. Result has 80 places, 39 transitions, 422 flow [2023-08-30 21:49:28,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=524, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=422, PETRI_PLACES=80, PETRI_TRANSITIONS=39} [2023-08-30 21:49:28,778 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 60 predicate places. [2023-08-30 21:49:28,783 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 39 transitions, 422 flow [2023-08-30 21:49:28,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.421052631578945) internal successors, (1110), 19 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:28,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:28,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:28,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:28,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:28,990 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:28,991 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:28,991 INFO L85 PathProgramCache]: Analyzing trace with hash 1577916472, now seen corresponding path program 4 times [2023-08-30 21:49:28,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:28,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413648365] [2023-08-30 21:49:28,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:28,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:29,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:29,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413648365] [2023-08-30 21:49:29,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413648365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:29,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847575388] [2023-08-30 21:49:29,124 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-08-30 21:49:29,124 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:29,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:29,125 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:29,127 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-30 21:49:29,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-08-30 21:49:29,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:49:29,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 21:49:29,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:29,281 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:29,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:29,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:29,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847575388] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:49:29,518 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:49:29,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 21:49:29,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308967664] [2023-08-30 21:49:29,519 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:49:29,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:49:29,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:29,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:49:29,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:49:29,688 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 147 [2023-08-30 21:49:29,689 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 39 transitions, 422 flow. Second operand has 19 states, 19 states have (on average 58.421052631578945) internal successors, (1110), 19 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:29,689 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:29,689 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 147 [2023-08-30 21:49:29,689 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:30,263 INFO L130 PetriNetUnfolder]: 81/179 cut-off events. [2023-08-30 21:49:30,264 INFO L131 PetriNetUnfolder]: For 977/977 co-relation queries the response was YES. [2023-08-30 21:49:30,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 179 events. 81/179 cut-off events. For 977/977 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 589 event pairs, 1 based on Foata normal form. 3/182 useless extension candidates. Maximal degree in co-relation 998. Up to 41 conditions per place. [2023-08-30 21:49:30,265 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 38 selfloop transitions, 28 changer transitions 18/84 dead transitions. [2023-08-30 21:49:30,265 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 84 transitions, 899 flow [2023-08-30 21:49:30,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 21:49:30,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 21:49:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1042 transitions. [2023-08-30 21:49:30,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4169667867146859 [2023-08-30 21:49:30,268 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1042 transitions. [2023-08-30 21:49:30,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1042 transitions. [2023-08-30 21:49:30,268 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:30,268 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1042 transitions. [2023-08-30 21:49:30,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 61.294117647058826) internal successors, (1042), 17 states have internal predecessors, (1042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:30,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:30,273 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:30,273 INFO L175 Difference]: Start difference. First operand has 80 places, 39 transitions, 422 flow. Second operand 17 states and 1042 transitions. [2023-08-30 21:49:30,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 84 transitions, 899 flow [2023-08-30 21:49:30,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 84 transitions, 795 flow, removed 9 selfloop flow, removed 12 redundant places. [2023-08-30 21:49:30,278 INFO L231 Difference]: Finished difference. Result has 82 places, 48 transitions, 535 flow [2023-08-30 21:49:30,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=355, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=535, PETRI_PLACES=82, PETRI_TRANSITIONS=48} [2023-08-30 21:49:30,278 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 62 predicate places. [2023-08-30 21:49:30,279 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 48 transitions, 535 flow [2023-08-30 21:49:30,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.421052631578945) internal successors, (1110), 19 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:30,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:30,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:30,290 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:30,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-08-30 21:49:30,481 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:30,482 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:30,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1858770940, now seen corresponding path program 5 times [2023-08-30 21:49:30,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:30,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485281823] [2023-08-30 21:49:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:30,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:30,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:30,659 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:30,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:30,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485281823] [2023-08-30 21:49:30,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485281823] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:30,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199349976] [2023-08-30 21:49:30,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-08-30 21:49:30,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:30,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:30,662 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:30,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-30 21:49:30,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:49:30,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:49:30,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2023-08-30 21:49:30,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:30,796 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-30 21:49:30,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199349976] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-30 21:49:30,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-30 21:49:30,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2023-08-30 21:49:30,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028703107] [2023-08-30 21:49:30,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-30 21:49:30,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-08-30 21:49:30,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:30,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-08-30 21:49:30,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2023-08-30 21:49:30,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 147 [2023-08-30 21:49:30,833 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 48 transitions, 535 flow. Second operand has 7 states, 7 states have (on average 63.142857142857146) internal successors, (442), 7 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:30,833 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:30,833 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 147 [2023-08-30 21:49:30,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:30,913 INFO L130 PetriNetUnfolder]: 72/142 cut-off events. [2023-08-30 21:49:30,913 INFO L131 PetriNetUnfolder]: For 834/834 co-relation queries the response was YES. [2023-08-30 21:49:30,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 861 conditions, 142 events. 72/142 cut-off events. For 834/834 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 391 event pairs, 8 based on Foata normal form. 1/143 useless extension candidates. Maximal degree in co-relation 834. Up to 45 conditions per place. [2023-08-30 21:49:30,914 INFO L137 encePairwiseOnDemand]: 141/147 looper letters, 28 selfloop transitions, 9 changer transitions 21/58 dead transitions. [2023-08-30 21:49:30,914 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 58 transitions, 698 flow [2023-08-30 21:49:30,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-08-30 21:49:30,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-08-30 21:49:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 459 transitions. [2023-08-30 21:49:30,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.446064139941691 [2023-08-30 21:49:30,916 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 459 transitions. [2023-08-30 21:49:30,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 459 transitions. [2023-08-30 21:49:30,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:30,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 459 transitions. [2023-08-30 21:49:30,917 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 65.57142857142857) internal successors, (459), 7 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:30,918 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:30,919 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 147.0) internal successors, (1176), 8 states have internal predecessors, (1176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:30,919 INFO L175 Difference]: Start difference. First operand has 82 places, 48 transitions, 535 flow. Second operand 7 states and 459 transitions. [2023-08-30 21:49:30,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 58 transitions, 698 flow [2023-08-30 21:49:30,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 58 transitions, 589 flow, removed 19 selfloop flow, removed 10 redundant places. [2023-08-30 21:49:30,923 INFO L231 Difference]: Finished difference. Result has 75 places, 34 transitions, 313 flow [2023-08-30 21:49:30,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=313, PETRI_PLACES=75, PETRI_TRANSITIONS=34} [2023-08-30 21:49:30,924 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 55 predicate places. [2023-08-30 21:49:30,924 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 34 transitions, 313 flow [2023-08-30 21:49:30,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 63.142857142857146) internal successors, (442), 7 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:30,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:30,924 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:30,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:31,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:31,136 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:31,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:31,136 INFO L85 PathProgramCache]: Analyzing trace with hash 2082091444, now seen corresponding path program 6 times [2023-08-30 21:49:31,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:31,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189157589] [2023-08-30 21:49:31,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:31,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:31,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:31,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:31,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189157589] [2023-08-30 21:49:31,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189157589] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:31,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901596545] [2023-08-30 21:49:31,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-08-30 21:49:31,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:31,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:31,261 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:31,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-30 21:49:31,327 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-08-30 21:49:31,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:49:31,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 21:49:31,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:31,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:31,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:31,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:31,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901596545] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:49:31,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:49:31,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2023-08-30 21:49:31,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585803890] [2023-08-30 21:49:31,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:49:31,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-08-30 21:49:31,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:31,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-08-30 21:49:31,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2023-08-30 21:49:31,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 147 [2023-08-30 21:49:31,923 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 34 transitions, 313 flow. Second operand has 19 states, 19 states have (on average 58.73684210526316) internal successors, (1116), 19 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:31,923 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:31,923 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 147 [2023-08-30 21:49:31,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:32,581 INFO L130 PetriNetUnfolder]: 54/123 cut-off events. [2023-08-30 21:49:32,581 INFO L131 PetriNetUnfolder]: For 494/494 co-relation queries the response was YES. [2023-08-30 21:49:32,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 123 events. 54/123 cut-off events. For 494/494 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 346 event pairs, 1 based on Foata normal form. 2/125 useless extension candidates. Maximal degree in co-relation 621. Up to 23 conditions per place. [2023-08-30 21:49:32,582 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 24 selfloop transitions, 17 changer transitions 28/69 dead transitions. [2023-08-30 21:49:32,582 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 69 transitions, 589 flow [2023-08-30 21:49:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-08-30 21:49:32,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2023-08-30 21:49:32,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 1035 transitions. [2023-08-30 21:49:32,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4141656662665066 [2023-08-30 21:49:32,585 INFO L72 ComplementDD]: Start complementDD. Operand 17 states and 1035 transitions. [2023-08-30 21:49:32,585 INFO L73 IsDeterministic]: Start isDeterministic. Operand 17 states and 1035 transitions. [2023-08-30 21:49:32,585 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:32,585 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 17 states and 1035 transitions. [2023-08-30 21:49:32,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 18 states, 17 states have (on average 60.88235294117647) internal successors, (1035), 17 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:32,596 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:32,603 INFO L81 ComplementDD]: Finished complementDD. Result has 18 states, 18 states have (on average 147.0) internal successors, (2646), 18 states have internal predecessors, (2646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:32,603 INFO L175 Difference]: Start difference. First operand has 75 places, 34 transitions, 313 flow. Second operand 17 states and 1035 transitions. [2023-08-30 21:49:32,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 69 transitions, 589 flow [2023-08-30 21:49:32,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 69 transitions, 514 flow, removed 9 selfloop flow, removed 13 redundant places. [2023-08-30 21:49:32,607 INFO L231 Difference]: Finished difference. Result has 74 places, 30 transitions, 249 flow [2023-08-30 21:49:32,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=249, PETRI_PLACES=74, PETRI_TRANSITIONS=30} [2023-08-30 21:49:32,607 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 54 predicate places. [2023-08-30 21:49:32,607 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 30 transitions, 249 flow [2023-08-30 21:49:32,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 58.73684210526316) internal successors, (1116), 19 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:32,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:32,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:32,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:32,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-08-30 21:49:32,816 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:32,816 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:32,816 INFO L85 PathProgramCache]: Analyzing trace with hash -669051972, now seen corresponding path program 7 times [2023-08-30 21:49:32,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:32,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264678289] [2023-08-30 21:49:32,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:32,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:32,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:32,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264678289] [2023-08-30 21:49:32,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264678289] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:32,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663883496] [2023-08-30 21:49:32,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-08-30 21:49:32,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:32,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:32,932 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:32,935 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-30 21:49:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:32,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 21:49:32,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:33,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:33,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:33,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663883496] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:49:33,299 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:49:33,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-08-30 21:49:33,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573042411] [2023-08-30 21:49:33,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:49:33,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-08-30 21:49:33,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:33,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-08-30 21:49:33,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-08-30 21:49:33,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 147 [2023-08-30 21:49:33,460 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 30 transitions, 249 flow. Second operand has 18 states, 18 states have (on average 58.44444444444444) internal successors, (1052), 18 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:33,460 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:33,460 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 147 [2023-08-30 21:49:33,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:33,656 INFO L130 PetriNetUnfolder]: 36/84 cut-off events. [2023-08-30 21:49:33,657 INFO L131 PetriNetUnfolder]: For 304/304 co-relation queries the response was YES. [2023-08-30 21:49:33,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 423 conditions, 84 events. 36/84 cut-off events. For 304/304 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 177 event pairs, 3 based on Foata normal form. 1/85 useless extension candidates. Maximal degree in co-relation 403. Up to 21 conditions per place. [2023-08-30 21:49:33,657 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 24 selfloop transitions, 13 changer transitions 7/44 dead transitions. [2023-08-30 21:49:33,657 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 44 transitions, 378 flow [2023-08-30 21:49:33,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-08-30 21:49:33,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-08-30 21:49:33,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 664 transitions. [2023-08-30 21:49:33,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4106369820655535 [2023-08-30 21:49:33,659 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 664 transitions. [2023-08-30 21:49:33,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 664 transitions. [2023-08-30 21:49:33,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:33,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 664 transitions. [2023-08-30 21:49:33,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 60.36363636363637) internal successors, (664), 11 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:33,662 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:33,662 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 147.0) internal successors, (1764), 12 states have internal predecessors, (1764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:33,662 INFO L175 Difference]: Start difference. First operand has 74 places, 30 transitions, 249 flow. Second operand 11 states and 664 transitions. [2023-08-30 21:49:33,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 44 transitions, 378 flow [2023-08-30 21:49:33,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 44 transitions, 336 flow, removed 5 selfloop flow, removed 13 redundant places. [2023-08-30 21:49:33,665 INFO L231 Difference]: Finished difference. Result has 63 places, 28 transitions, 215 flow [2023-08-30 21:49:33,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=207, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=215, PETRI_PLACES=63, PETRI_TRANSITIONS=28} [2023-08-30 21:49:33,665 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 43 predicate places. [2023-08-30 21:49:33,665 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 28 transitions, 215 flow [2023-08-30 21:49:33,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 58.44444444444444) internal successors, (1052), 18 states have internal predecessors, (1052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:33,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-30 21:49:33,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-30 21:49:33,673 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:33,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-08-30 21:49:33,867 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-08-30 21:49:33,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-30 21:49:33,867 INFO L85 PathProgramCache]: Analyzing trace with hash -685831032, now seen corresponding path program 8 times [2023-08-30 21:49:33,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-30 21:49:33,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622881705] [2023-08-30 21:49:33,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-30 21:49:33,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-30 21:49:33,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-30 21:49:34,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:34,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-30 21:49:34,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622881705] [2023-08-30 21:49:34,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622881705] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-30 21:49:34,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312768359] [2023-08-30 21:49:34,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-30 21:49:34,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-30 21:49:34,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-30 21:49:34,041 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-30 21:49:34,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-30 21:49:34,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-30 21:49:34,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-30 21:49:34,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 18 conjunts are in the unsatisfiable core [2023-08-30 21:49:34,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-08-30 21:49:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:34,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-08-30 21:49:34,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-30 21:49:34,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312768359] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-30 21:49:34,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-30 21:49:34,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 18 [2023-08-30 21:49:34,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702107856] [2023-08-30 21:49:34,475 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-30 21:49:34,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-08-30 21:49:34,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-30 21:49:34,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-08-30 21:49:34,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2023-08-30 21:49:34,684 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 147 [2023-08-30 21:49:34,685 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 28 transitions, 215 flow. Second operand has 20 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:34,685 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-30 21:49:34,685 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 147 [2023-08-30 21:49:34,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-30 21:49:34,882 INFO L130 PetriNetUnfolder]: 34/74 cut-off events. [2023-08-30 21:49:34,882 INFO L131 PetriNetUnfolder]: For 252/252 co-relation queries the response was YES. [2023-08-30 21:49:34,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 361 conditions, 74 events. 34/74 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 145 event pairs, 3 based on Foata normal form. 1/75 useless extension candidates. Maximal degree in co-relation 345. Up to 21 conditions per place. [2023-08-30 21:49:34,883 INFO L137 encePairwiseOnDemand]: 139/147 looper letters, 0 selfloop transitions, 0 changer transitions 36/36 dead transitions. [2023-08-30 21:49:34,883 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 36 transitions, 312 flow [2023-08-30 21:49:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-08-30 21:49:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2023-08-30 21:49:34,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 515 transitions. [2023-08-30 21:49:34,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3892668178382464 [2023-08-30 21:49:34,884 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 515 transitions. [2023-08-30 21:49:34,884 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 515 transitions. [2023-08-30 21:49:34,884 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-30 21:49:34,884 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 515 transitions. [2023-08-30 21:49:34,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 57.22222222222222) internal successors, (515), 9 states have internal predecessors, (515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:34,886 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 147.0) internal successors, (1470), 10 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:34,887 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 147.0) internal successors, (1470), 10 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:34,887 INFO L175 Difference]: Start difference. First operand has 63 places, 28 transitions, 215 flow. Second operand 9 states and 515 transitions. [2023-08-30 21:49:34,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 36 transitions, 312 flow [2023-08-30 21:49:34,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 36 transitions, 285 flow, removed 2 selfloop flow, removed 8 redundant places. [2023-08-30 21:49:34,888 INFO L231 Difference]: Finished difference. Result has 59 places, 0 transitions, 0 flow [2023-08-30 21:49:34,889 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=147, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=0, PETRI_PLACES=59, PETRI_TRANSITIONS=0} [2023-08-30 21:49:34,889 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 39 predicate places. [2023-08-30 21:49:34,889 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 0 transitions, 0 flow [2023-08-30 21:49:34,890 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 55.8) internal successors, (1116), 20 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-30 21:49:34,892 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2023-08-30 21:49:34,892 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-30 21:49:34,892 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-30 21:49:34,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-30 21:49:35,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-08-30 21:49:35,097 INFO L445 BasicCegarLoop]: Path program histogram: [8, 6, 6, 6] [2023-08-30 21:49:35,100 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2023-08-30 21:49:35,100 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-30 21:49:35,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.08 09:49:35 BasicIcfg [2023-08-30 21:49:35,103 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-30 21:49:35,104 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-08-30 21:49:35,104 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-08-30 21:49:35,104 INFO L275 PluginConnector]: Witness Printer initialized [2023-08-30 21:49:35,104 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.08 09:49:16" (3/4) ... [2023-08-30 21:49:35,107 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-08-30 21:49:35,112 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2023-08-30 21:49:35,112 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2023-08-30 21:49:35,115 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 17 nodes and edges [2023-08-30 21:49:35,115 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2023-08-30 21:49:35,116 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-08-30 21:49:35,116 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-08-30 21:49:35,139 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-08-30 21:49:35,140 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-08-30 21:49:35,140 INFO L158 Benchmark]: Toolchain (without parser) took 19256.23ms. Allocated memory was 62.9MB in the beginning and 163.6MB in the end (delta: 100.7MB). Free memory was 34.7MB in the beginning and 114.6MB in the end (delta: -79.8MB). Peak memory consumption was 20.3MB. Max. memory is 16.1GB. [2023-08-30 21:49:35,141 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 50.3MB. Free memory was 28.7MB in the beginning and 28.7MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 21:49:35,141 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.45ms. Allocated memory is still 62.9MB. Free memory was 34.6MB in the beginning and 39.7MB in the end (delta: -5.1MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. [2023-08-30 21:49:35,141 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.33ms. Allocated memory is still 62.9MB. Free memory was 39.5MB in the beginning and 38.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-08-30 21:49:35,141 INFO L158 Benchmark]: Boogie Preprocessor took 40.09ms. Allocated memory is still 62.9MB. Free memory was 38.1MB in the beginning and 36.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2023-08-30 21:49:35,143 INFO L158 Benchmark]: RCFGBuilder took 302.67ms. Allocated memory is still 62.9MB. Free memory was 36.7MB in the beginning and 40.2MB in the end (delta: -3.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-08-30 21:49:35,143 INFO L158 Benchmark]: TraceAbstraction took 18578.07ms. Allocated memory was 62.9MB in the beginning and 163.6MB in the end (delta: 100.7MB). Free memory was 39.7MB in the beginning and 117.7MB in the end (delta: -78.0MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. [2023-08-30 21:49:35,144 INFO L158 Benchmark]: Witness Printer took 36.06ms. Allocated memory is still 163.6MB. Free memory was 117.7MB in the beginning and 114.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-08-30 21:49:35,145 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 50.3MB. Free memory was 28.7MB in the beginning and 28.7MB in the end (delta: 1.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 252.45ms. Allocated memory is still 62.9MB. Free memory was 34.6MB in the beginning and 39.7MB in the end (delta: -5.1MB). Peak memory consumption was 9.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.33ms. Allocated memory is still 62.9MB. Free memory was 39.5MB in the beginning and 38.1MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.09ms. Allocated memory is still 62.9MB. Free memory was 38.1MB in the beginning and 36.7MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 302.67ms. Allocated memory is still 62.9MB. Free memory was 36.7MB in the beginning and 40.2MB in the end (delta: -3.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 18578.07ms. Allocated memory was 62.9MB in the beginning and 163.6MB in the end (delta: 100.7MB). Free memory was 39.7MB in the beginning and 117.7MB in the end (delta: -78.0MB). Peak memory consumption was 22.2MB. Max. memory is 16.1GB. * Witness Printer took 36.06ms. Allocated memory is still 163.6MB. Free memory was 117.7MB in the beginning and 114.6MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.8s, 72 PlacesBefore, 20 PlacesAfterwards, 71 TransitionsBefore, 15 TransitionsAfterwards, 572 CoEnabledTransitionPairs, 6 FixpointIterations, 34 TrivialSequentialCompositions, 19 ConcurrentSequentialCompositions, 5 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 66 TotalNumberOfCompositions, 581 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 552, independent: 540, independent conditional: 0, independent unconditional: 540, dependent: 12, dependent conditional: 0, dependent unconditional: 12, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 305, independent: 303, independent conditional: 0, independent unconditional: 303, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 552, independent: 237, independent conditional: 0, independent unconditional: 237, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 305, unknown conditional: 0, unknown unconditional: 305] , Statistics on independence cache: Total cache size (in pairs): 20, Positive cache size: 19, Positive conditional cache size: 0, Positive unconditional cache size: 19, Negative cache size: 1, Negative conditional cache size: 0, Negative unconditional cache size: 1, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - PositiveResult [Line: 79]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 98 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 18.4s, OverallIterations: 26, TraceHistogramMax: 1, PathProgramHistogramMax: 8, EmptinessCheckTime: 0.0s, AutomataDifference: 7.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2519 SdHoareTripleChecker+Valid, 4.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2075 mSDsluCounter, 2280 SdHoareTripleChecker+Invalid, 3.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2077 mSDsCounter, 284 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8386 IncrementalHoareTripleChecker+Invalid, 8670 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 284 mSolverCounterUnsat, 203 mSDtfsCounter, 8386 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 581 GetRequests, 253 SyntacticMatches, 34 SemanticMatches, 294 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1073 ImplicationChecksByTransitivity, 3.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=967occurred in iteration=15, InterpolantAutomatonStates: 209, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 5.4s InterpolantComputationTime, 542 NumberOfCodeBlocks, 542 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 654 ConstructedInterpolants, 0 QuantifiedInterpolants, 4322 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1428 ConjunctsInSsa, 159 ConjunctsInUnsatCore, 49 InterpolantComputations, 19 PerfectInterpolantSequences, 14/66 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-08-30 21:49:35,167 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE