./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/array-eq-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/array-eq-symm.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 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 21:36:14,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 21:36:14,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 21:36:14,131 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 21:36:14,132 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 21:36:14,132 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 21:36:14,133 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 21:36:14,135 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 21:36:14,136 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 21:36:14,137 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 21:36:14,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 21:36:14,138 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 21:36:14,138 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 21:36:14,139 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 21:36:14,140 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 21:36:14,141 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 21:36:14,141 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 21:36:14,142 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 21:36:14,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 21:36:14,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 21:36:14,145 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 21:36:14,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 21:36:14,146 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 21:36:14,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 21:36:14,148 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 21:36:14,149 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 21:36:14,150 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 21:36:14,150 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 21:36:14,150 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 21:36:14,151 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 21:36:14,151 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 21:36:14,152 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 21:36:14,152 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 21:36:14,153 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 21:36:14,153 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 21:36:14,154 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 21:36:14,155 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 21:36:14,155 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 21:36:14,157 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 21:36:14,157 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 21:36:14,158 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 21:36:14,158 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 21:36:14,161 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 21:36:14,175 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 21:36:14,175 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 21:36:14,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 21:36:14,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 21:36:14,176 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 21:36:14,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 21:36:14,177 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 21:36:14,177 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 21:36:14,177 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 21:36:14,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 21:36:14,177 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 21:36:14,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 21:36:14,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 21:36:14,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 21:36:14,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 21:36:14,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 21:36:14,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 21:36:14,179 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 21:36:14,179 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 21:36:14,179 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 21:36:14,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 21:36:14,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 21:36:14,180 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 21:36:14,180 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 21:36:14,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:36:14,180 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 21:36:14,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 21:36:14,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 21:36:14,181 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 21:36:14,181 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 21:36:14,181 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 21:36:14,181 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 21:36:14,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 21:36:14,181 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1a172ae6dd3a5207c1a2580ce55cc24497fcf78586be62b7482a56f18aa6beb2 [2022-07-22 21:36:14,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 21:36:14,416 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 21:36:14,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 21:36:14,419 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 21:36:14,420 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 21:36:14,421 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-07-22 21:36:14,477 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c765e9e0e/1c360d5240df450d8aac350a0f295e21/FLAG5fdc374dc [2022-07-22 21:36:14,870 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 21:36:14,871 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c [2022-07-22 21:36:14,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c765e9e0e/1c360d5240df450d8aac350a0f295e21/FLAG5fdc374dc [2022-07-22 21:36:15,288 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c765e9e0e/1c360d5240df450d8aac350a0f295e21 [2022-07-22 21:36:15,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 21:36:15,291 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 21:36:15,292 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 21:36:15,292 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 21:36:15,295 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 21:36:15,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,296 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38098d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15, skipping insertion in model container [2022-07-22 21:36:15,296 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,301 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 21:36:15,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 21:36:15,444 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-07-22 21:36:15,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:36:15,454 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 21:36:15,466 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/array-eq-symm.wvr.c[2251,2264] [2022-07-22 21:36:15,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 21:36:15,477 INFO L208 MainTranslator]: Completed translation [2022-07-22 21:36:15,478 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15 WrapperNode [2022-07-22 21:36:15,478 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 21:36:15,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 21:36:15,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 21:36:15,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 21:36:15,486 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,491 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,506 INFO L137 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 7, calls inlined = 9, statements flattened = 112 [2022-07-22 21:36:15,506 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 21:36:15,507 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 21:36:15,507 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 21:36:15,507 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 21:36:15,513 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,513 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,517 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,522 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,534 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 21:36:15,535 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 21:36:15,535 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 21:36:15,535 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 21:36:15,536 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15" (1/1) ... [2022-07-22 21:36:15,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 21:36:15,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:15,557 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 21:36:15,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 21:36:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 21:36:15,593 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-22 21:36:15,593 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-22 21:36:15,594 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-22 21:36:15,594 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-22 21:36:15,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 21:36:15,594 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 21:36:15,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 21:36:15,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-22 21:36:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 21:36:15,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 21:36:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 21:36:15,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 21:36:15,599 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-22 21:36:15,685 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 21:36:15,686 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 21:36:15,991 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 21:36:15,997 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 21:36:16,003 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2022-07-22 21:36:16,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:36:16 BoogieIcfgContainer [2022-07-22 21:36:16,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 21:36:16,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 21:36:16,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 21:36:16,016 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 21:36:16,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:36:15" (1/3) ... [2022-07-22 21:36:16,017 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6558d04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:36:16, skipping insertion in model container [2022-07-22 21:36:16,017 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:36:15" (2/3) ... [2022-07-22 21:36:16,018 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6558d04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:36:16, skipping insertion in model container [2022-07-22 21:36:16,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:36:16" (3/3) ... [2022-07-22 21:36:16,019 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.c [2022-07-22 21:36:16,022 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-22 21:36:16,029 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 21:36:16,029 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 21:36:16,030 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-22 21:36:16,072 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-22 21:36:16,107 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 166 places, 174 transitions, 364 flow [2022-07-22 21:36:16,152 INFO L129 PetriNetUnfolder]: 15/172 cut-off events. [2022-07-22 21:36:16,153 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:36:16,156 INFO L84 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 15/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 115 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 131. Up to 3 conditions per place. [2022-07-22 21:36:16,156 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 174 transitions, 364 flow [2022-07-22 21:36:16,164 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 163 transitions, 338 flow [2022-07-22 21:36:16,174 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 21:36:16,178 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@26dca6d9, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7ab14fa [2022-07-22 21:36:16,178 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-22 21:36:16,211 INFO L129 PetriNetUnfolder]: 15/162 cut-off events. [2022-07-22 21:36:16,212 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-22 21:36:16,212 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:16,213 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:16,215 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:16,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:16,219 INFO L85 PathProgramCache]: Analyzing trace with hash -425245189, now seen corresponding path program 1 times [2022-07-22 21:36:16,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:16,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682473311] [2022-07-22 21:36:16,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:16,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:16,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:16,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:16,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682473311] [2022-07-22 21:36:16,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682473311] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:16,429 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:16,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 21:36:16,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751495558] [2022-07-22 21:36:16,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:16,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 21:36:16,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:16,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 21:36:16,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 21:36:16,457 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 160 out of 174 [2022-07-22 21:36:16,460 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 163 transitions, 338 flow. Second operand has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:16,460 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:16,460 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 160 of 174 [2022-07-22 21:36:16,461 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:16,507 INFO L129 PetriNetUnfolder]: 6/154 cut-off events. [2022-07-22 21:36:16,507 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-22 21:36:16,509 INFO L84 FinitePrefix]: Finished finitePrefix Result has 168 conditions, 154 events. 6/154 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 107 event pairs, 0 based on Foata normal form. 11/154 useless extension candidates. Maximal degree in co-relation 125. Up to 5 conditions per place. [2022-07-22 21:36:16,510 INFO L132 encePairwiseOnDemand]: 165/174 looper letters, 4 selfloop transitions, 0 changer transitions 5/154 dead transitions. [2022-07-22 21:36:16,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 154 transitions, 328 flow [2022-07-22 21:36:16,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 21:36:16,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-22 21:36:16,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 333 transitions. [2022-07-22 21:36:16,525 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9568965517241379 [2022-07-22 21:36:16,526 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 333 transitions. [2022-07-22 21:36:16,526 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 333 transitions. [2022-07-22 21:36:16,529 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:16,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 333 transitions. [2022-07-22 21:36:16,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 166.5) internal successors, (333), 2 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:16,543 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:16,543 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:16,545 INFO L186 Difference]: Start difference. First operand has 155 places, 163 transitions, 338 flow. Second operand 2 states and 333 transitions. [2022-07-22 21:36:16,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 154 transitions, 328 flow [2022-07-22 21:36:16,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 154 transitions, 320 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-22 21:36:16,552 INFO L242 Difference]: Finished difference. Result has 152 places, 149 transitions, 302 flow [2022-07-22 21:36:16,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=302, PETRI_PLACES=152, PETRI_TRANSITIONS=149} [2022-07-22 21:36:16,558 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, -3 predicate places. [2022-07-22 21:36:16,558 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 149 transitions, 302 flow [2022-07-22 21:36:16,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 163.5) internal successors, (327), 2 states have internal predecessors, (327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:16,559 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:16,559 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:16,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 21:36:16,560 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:16,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:16,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2116646914, now seen corresponding path program 1 times [2022-07-22 21:36:16,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:16,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811202611] [2022-07-22 21:36:16,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:16,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:16,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:16,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:16,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:16,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811202611] [2022-07-22 21:36:16,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811202611] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:16,909 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:16,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 21:36:16,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203383190] [2022-07-22 21:36:16,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:16,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 21:36:16,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:16,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 21:36:16,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-22 21:36:16,917 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 174 [2022-07-22 21:36:16,918 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 149 transitions, 302 flow. Second operand has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:16,919 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:16,919 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 174 [2022-07-22 21:36:16,919 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:17,124 INFO L129 PetriNetUnfolder]: 171/632 cut-off events. [2022-07-22 21:36:17,124 INFO L130 PetriNetUnfolder]: For 22/34 co-relation queries the response was YES. [2022-07-22 21:36:17,127 INFO L84 FinitePrefix]: Finished finitePrefix Result has 964 conditions, 632 events. 171/632 cut-off events. For 22/34 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3089 event pairs, 41 based on Foata normal form. 1/552 useless extension candidates. Maximal degree in co-relation 961. Up to 122 conditions per place. [2022-07-22 21:36:17,130 INFO L132 encePairwiseOnDemand]: 167/174 looper letters, 65 selfloop transitions, 5 changer transitions 4/185 dead transitions. [2022-07-22 21:36:17,130 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 185 transitions, 527 flow [2022-07-22 21:36:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-22 21:36:17,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-22 21:36:17,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 801 transitions. [2022-07-22 21:36:17,134 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7672413793103449 [2022-07-22 21:36:17,134 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 801 transitions. [2022-07-22 21:36:17,134 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 801 transitions. [2022-07-22 21:36:17,134 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:17,135 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 801 transitions. [2022-07-22 21:36:17,136 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 133.5) internal successors, (801), 6 states have internal predecessors, (801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,139 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,140 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 174.0) internal successors, (1218), 7 states have internal predecessors, (1218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,140 INFO L186 Difference]: Start difference. First operand has 152 places, 149 transitions, 302 flow. Second operand 6 states and 801 transitions. [2022-07-22 21:36:17,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 185 transitions, 527 flow [2022-07-22 21:36:17,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 185 transitions, 527 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-22 21:36:17,147 INFO L242 Difference]: Finished difference. Result has 155 places, 152 transitions, 331 flow [2022-07-22 21:36:17,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=155, PETRI_TRANSITIONS=152} [2022-07-22 21:36:17,148 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-07-22 21:36:17,148 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 152 transitions, 331 flow [2022-07-22 21:36:17,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 125.66666666666667) internal successors, (754), 6 states have internal predecessors, (754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,149 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:17,149 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:17,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 21:36:17,150 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:17,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:17,151 INFO L85 PathProgramCache]: Analyzing trace with hash 336168701, now seen corresponding path program 1 times [2022-07-22 21:36:17,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:17,151 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680589737] [2022-07-22 21:36:17,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:17,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:17,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:17,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:17,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680589737] [2022-07-22 21:36:17,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680589737] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:17,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:17,298 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:36:17,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550492665] [2022-07-22 21:36:17,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:17,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:36:17,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:17,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:36:17,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:36:17,301 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-07-22 21:36:17,302 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 152 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,303 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:17,303 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-07-22 21:36:17,303 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:17,500 INFO L129 PetriNetUnfolder]: 119/657 cut-off events. [2022-07-22 21:36:17,500 INFO L130 PetriNetUnfolder]: For 39/50 co-relation queries the response was YES. [2022-07-22 21:36:17,502 INFO L84 FinitePrefix]: Finished finitePrefix Result has 979 conditions, 657 events. 119/657 cut-off events. For 39/50 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 3077 event pairs, 44 based on Foata normal form. 0/567 useless extension candidates. Maximal degree in co-relation 972. Up to 97 conditions per place. [2022-07-22 21:36:17,504 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 63 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2022-07-22 21:36:17,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 188 transitions, 569 flow [2022-07-22 21:36:17,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:36:17,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:36:17,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1317 transitions. [2022-07-22 21:36:17,507 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.756896551724138 [2022-07-22 21:36:17,507 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1317 transitions. [2022-07-22 21:36:17,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1317 transitions. [2022-07-22 21:36:17,508 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:17,508 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1317 transitions. [2022-07-22 21:36:17,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.7) internal successors, (1317), 10 states have internal predecessors, (1317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,513 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,514 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,514 INFO L186 Difference]: Start difference. First operand has 155 places, 152 transitions, 331 flow. Second operand 10 states and 1317 transitions. [2022-07-22 21:36:17,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 188 transitions, 569 flow [2022-07-22 21:36:17,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 188 transitions, 565 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-22 21:36:17,518 INFO L242 Difference]: Finished difference. Result has 163 places, 157 transitions, 388 flow [2022-07-22 21:36:17,518 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=388, PETRI_PLACES=163, PETRI_TRANSITIONS=157} [2022-07-22 21:36:17,519 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 8 predicate places. [2022-07-22 21:36:17,519 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 157 transitions, 388 flow [2022-07-22 21:36:17,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,520 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:17,520 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:17,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 21:36:17,520 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:17,521 INFO L85 PathProgramCache]: Analyzing trace with hash -506615031, now seen corresponding path program 1 times [2022-07-22 21:36:17,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:17,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867517219] [2022-07-22 21:36:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:17,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:17,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:17,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:17,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:17,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867517219] [2022-07-22 21:36:17,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867517219] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:17,625 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:17,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:36:17,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660700952] [2022-07-22 21:36:17,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:17,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:36:17,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:17,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:36:17,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:36:17,629 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-07-22 21:36:17,631 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 157 transitions, 388 flow. Second operand has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,631 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:17,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-07-22 21:36:17,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:17,786 INFO L129 PetriNetUnfolder]: 105/629 cut-off events. [2022-07-22 21:36:17,786 INFO L130 PetriNetUnfolder]: For 88/97 co-relation queries the response was YES. [2022-07-22 21:36:17,788 INFO L84 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 629 events. 105/629 cut-off events. For 88/97 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2949 event pairs, 32 based on Foata normal form. 0/571 useless extension candidates. Maximal degree in co-relation 974. Up to 87 conditions per place. [2022-07-22 21:36:17,790 INFO L132 encePairwiseOnDemand]: 162/174 looper letters, 46 selfloop transitions, 11 changer transitions 19/187 dead transitions. [2022-07-22 21:36:17,790 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 187 transitions, 611 flow [2022-07-22 21:36:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-22 21:36:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-07-22 21:36:17,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1316 transitions. [2022-07-22 21:36:17,792 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7563218390804598 [2022-07-22 21:36:17,793 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1316 transitions. [2022-07-22 21:36:17,793 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1316 transitions. [2022-07-22 21:36:17,793 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:17,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1316 transitions. [2022-07-22 21:36:17,797 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 131.6) internal successors, (1316), 10 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,803 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 174.0) internal successors, (1914), 11 states have internal predecessors, (1914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,803 INFO L186 Difference]: Start difference. First operand has 163 places, 157 transitions, 388 flow. Second operand 10 states and 1316 transitions. [2022-07-22 21:36:17,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 187 transitions, 611 flow [2022-07-22 21:36:17,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 187 transitions, 603 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-07-22 21:36:17,807 INFO L242 Difference]: Finished difference. Result has 170 places, 154 transitions, 393 flow [2022-07-22 21:36:17,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=393, PETRI_PLACES=170, PETRI_TRANSITIONS=154} [2022-07-22 21:36:17,809 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 15 predicate places. [2022-07-22 21:36:17,809 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 154 transitions, 393 flow [2022-07-22 21:36:17,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 128.42857142857142) internal successors, (899), 7 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,811 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:17,812 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:17,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 21:36:17,812 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:17,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:17,813 INFO L85 PathProgramCache]: Analyzing trace with hash 131354636, now seen corresponding path program 1 times [2022-07-22 21:36:17,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:17,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121950112] [2022-07-22 21:36:17,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:17,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:17,974 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:36:17,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:17,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121950112] [2022-07-22 21:36:17,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121950112] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:17,975 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:17,975 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:36:17,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894948058] [2022-07-22 21:36:17,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:17,976 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:36:17,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:17,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:36:17,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:36:17,977 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-07-22 21:36:17,978 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 154 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:17,978 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:17,978 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-07-22 21:36:17,978 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:18,138 INFO L129 PetriNetUnfolder]: 118/629 cut-off events. [2022-07-22 21:36:18,138 INFO L130 PetriNetUnfolder]: For 137/148 co-relation queries the response was YES. [2022-07-22 21:36:18,140 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1029 conditions, 629 events. 118/629 cut-off events. For 137/148 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 2982 event pairs, 44 based on Foata normal form. 7/589 useless extension candidates. Maximal degree in co-relation 1019. Up to 97 conditions per place. [2022-07-22 21:36:18,142 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 56 selfloop transitions, 10 changer transitions 0/177 dead transitions. [2022-07-22 21:36:18,142 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 177 transitions, 587 flow [2022-07-22 21:36:18,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:36:18,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:36:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1057 transitions. [2022-07-22 21:36:18,144 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7593390804597702 [2022-07-22 21:36:18,145 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1057 transitions. [2022-07-22 21:36:18,145 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1057 transitions. [2022-07-22 21:36:18,145 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:18,145 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1057 transitions. [2022-07-22 21:36:18,147 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.125) internal successors, (1057), 8 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:18,149 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:18,149 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:18,149 INFO L186 Difference]: Start difference. First operand has 170 places, 154 transitions, 393 flow. Second operand 8 states and 1057 transitions. [2022-07-22 21:36:18,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 177 transitions, 587 flow [2022-07-22 21:36:18,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 177 transitions, 552 flow, removed 5 selfloop flow, removed 10 redundant places. [2022-07-22 21:36:18,154 INFO L242 Difference]: Finished difference. Result has 165 places, 156 transitions, 398 flow [2022-07-22 21:36:18,155 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=364, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=398, PETRI_PLACES=165, PETRI_TRANSITIONS=156} [2022-07-22 21:36:18,155 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 10 predicate places. [2022-07-22 21:36:18,155 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 156 transitions, 398 flow [2022-07-22 21:36:18,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:18,156 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:18,156 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:18,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 21:36:18,157 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:18,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:18,157 INFO L85 PathProgramCache]: Analyzing trace with hash -679366620, now seen corresponding path program 1 times [2022-07-22 21:36:18,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:18,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693595769] [2022-07-22 21:36:18,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:18,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:36:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:18,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693595769] [2022-07-22 21:36:18,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693595769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:18,239 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:18,239 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 21:36:18,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734338994] [2022-07-22 21:36:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:18,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 21:36:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:18,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 21:36:18,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2022-07-22 21:36:18,242 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 174 [2022-07-22 21:36:18,243 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 156 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:18,243 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:18,243 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 174 [2022-07-22 21:36:18,243 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:18,377 INFO L129 PetriNetUnfolder]: 104/601 cut-off events. [2022-07-22 21:36:18,377 INFO L130 PetriNetUnfolder]: For 112/121 co-relation queries the response was YES. [2022-07-22 21:36:18,379 INFO L84 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 601 events. 104/601 cut-off events. For 112/121 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 2854 event pairs, 32 based on Foata normal form. 0/545 useless extension candidates. Maximal degree in co-relation 943. Up to 87 conditions per place. [2022-07-22 21:36:18,380 INFO L132 encePairwiseOnDemand]: 164/174 looper letters, 49 selfloop transitions, 9 changer transitions 7/176 dead transitions. [2022-07-22 21:36:18,380 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 176 transitions, 579 flow [2022-07-22 21:36:18,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 21:36:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-22 21:36:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1056 transitions. [2022-07-22 21:36:18,383 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7586206896551724 [2022-07-22 21:36:18,383 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1056 transitions. [2022-07-22 21:36:18,383 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1056 transitions. [2022-07-22 21:36:18,384 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:18,384 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1056 transitions. [2022-07-22 21:36:18,386 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 132.0) internal successors, (1056), 8 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:18,387 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:18,388 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 174.0) internal successors, (1566), 9 states have internal predecessors, (1566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:18,388 INFO L186 Difference]: Start difference. First operand has 165 places, 156 transitions, 398 flow. Second operand 8 states and 1056 transitions. [2022-07-22 21:36:18,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 176 transitions, 579 flow [2022-07-22 21:36:18,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 176 transitions, 561 flow, removed 0 selfloop flow, removed 5 redundant places. [2022-07-22 21:36:18,393 INFO L242 Difference]: Finished difference. Result has 168 places, 155 transitions, 394 flow [2022-07-22 21:36:18,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=394, PETRI_PLACES=168, PETRI_TRANSITIONS=155} [2022-07-22 21:36:18,395 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 13 predicate places. [2022-07-22 21:36:18,395 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 155 transitions, 394 flow [2022-07-22 21:36:18,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 129.0) internal successors, (903), 7 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:18,396 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:18,396 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:18,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-22 21:36:18,396 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:18,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:18,397 INFO L85 PathProgramCache]: Analyzing trace with hash -1008062393, now seen corresponding path program 1 times [2022-07-22 21:36:18,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:18,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715385135] [2022-07-22 21:36:18,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:18,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:18,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:36:18,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:18,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715385135] [2022-07-22 21:36:18,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715385135] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:18,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028864309] [2022-07-22 21:36:18,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:18,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:18,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:18,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:36:18,603 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 21:36:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:18,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:36:18,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:36:19,107 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:36:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:36:19,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028864309] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:19,486 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:36:19,486 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2022-07-22 21:36:19,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581299192] [2022-07-22 21:36:19,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:19,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:36:19,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:19,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:36:19,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-07-22 21:36:19,489 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2022-07-22 21:36:19,490 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 155 transitions, 394 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:19,490 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:19,490 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2022-07-22 21:36:19,490 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:19,815 INFO L129 PetriNetUnfolder]: 89/571 cut-off events. [2022-07-22 21:36:19,815 INFO L130 PetriNetUnfolder]: For 133/133 co-relation queries the response was YES. [2022-07-22 21:36:19,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 917 conditions, 571 events. 89/571 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 2674 event pairs, 24 based on Foata normal form. 6/540 useless extension candidates. Maximal degree in co-relation 906. Up to 71 conditions per place. [2022-07-22 21:36:19,819 INFO L132 encePairwiseOnDemand]: 160/174 looper letters, 49 selfloop transitions, 15 changer transitions 0/173 dead transitions. [2022-07-22 21:36:19,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 173 transitions, 574 flow [2022-07-22 21:36:19,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:36:19,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:36:19,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1770 transitions. [2022-07-22 21:36:19,822 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7266009852216748 [2022-07-22 21:36:19,822 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1770 transitions. [2022-07-22 21:36:19,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1770 transitions. [2022-07-22 21:36:19,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:19,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1770 transitions. [2022-07-22 21:36:19,826 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.42857142857143) internal successors, (1770), 14 states have internal predecessors, (1770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:19,829 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:19,829 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:19,829 INFO L186 Difference]: Start difference. First operand has 168 places, 155 transitions, 394 flow. Second operand 14 states and 1770 transitions. [2022-07-22 21:36:19,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 173 transitions, 574 flow [2022-07-22 21:36:19,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 173 transitions, 544 flow, removed 5 selfloop flow, removed 8 redundant places. [2022-07-22 21:36:19,833 INFO L242 Difference]: Finished difference. Result has 175 places, 158 transitions, 426 flow [2022-07-22 21:36:19,833 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=426, PETRI_PLACES=175, PETRI_TRANSITIONS=158} [2022-07-22 21:36:19,834 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 20 predicate places. [2022-07-22 21:36:19,834 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 158 transitions, 426 flow [2022-07-22 21:36:19,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:19,834 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:19,835 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:19,859 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 21:36:20,051 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 [2022-07-22 21:36:20,051 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:20,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:20,052 INFO L85 PathProgramCache]: Analyzing trace with hash -209614447, now seen corresponding path program 1 times [2022-07-22 21:36:20,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:20,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435685898] [2022-07-22 21:36:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:20,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:20,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:20,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:20,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435685898] [2022-07-22 21:36:20,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435685898] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:20,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069147659] [2022-07-22 21:36:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:20,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:20,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:20,192 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:36:20,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 21:36:20,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:20,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 298 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 21:36:20,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:20,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:36:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:20,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069147659] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:20,923 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-22 21:36:20,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13, 11] total 30 [2022-07-22 21:36:20,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918189448] [2022-07-22 21:36:20,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:20,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 21:36:20,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:20,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 21:36:20,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=667, Unknown=0, NotChecked=0, Total=870 [2022-07-22 21:36:20,925 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 174 [2022-07-22 21:36:20,926 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 158 transitions, 426 flow. Second operand has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:20,926 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:20,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 174 [2022-07-22 21:36:20,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:21,261 INFO L129 PetriNetUnfolder]: 76/555 cut-off events. [2022-07-22 21:36:21,262 INFO L130 PetriNetUnfolder]: For 162/162 co-relation queries the response was YES. [2022-07-22 21:36:21,263 INFO L84 FinitePrefix]: Finished finitePrefix Result has 922 conditions, 555 events. 76/555 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2656 event pairs, 27 based on Foata normal form. 0/512 useless extension candidates. Maximal degree in co-relation 910. Up to 80 conditions per place. [2022-07-22 21:36:21,264 INFO L132 encePairwiseOnDemand]: 160/174 looper letters, 50 selfloop transitions, 15 changer transitions 0/174 dead transitions. [2022-07-22 21:36:21,264 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 174 transitions, 610 flow [2022-07-22 21:36:21,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-22 21:36:21,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-07-22 21:36:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 1768 transitions. [2022-07-22 21:36:21,268 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7257799671592775 [2022-07-22 21:36:21,268 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 1768 transitions. [2022-07-22 21:36:21,268 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 1768 transitions. [2022-07-22 21:36:21,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:21,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 1768 transitions. [2022-07-22 21:36:21,272 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 126.28571428571429) internal successors, (1768), 14 states have internal predecessors, (1768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,275 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,276 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 174.0) internal successors, (2610), 15 states have internal predecessors, (2610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,276 INFO L186 Difference]: Start difference. First operand has 175 places, 158 transitions, 426 flow. Second operand 14 states and 1768 transitions. [2022-07-22 21:36:21,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 174 transitions, 610 flow [2022-07-22 21:36:21,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 174 transitions, 591 flow, removed 1 selfloop flow, removed 8 redundant places. [2022-07-22 21:36:21,298 INFO L242 Difference]: Finished difference. Result has 182 places, 159 transitions, 451 flow [2022-07-22 21:36:21,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=451, PETRI_PLACES=182, PETRI_TRANSITIONS=159} [2022-07-22 21:36:21,301 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 27 predicate places. [2022-07-22 21:36:21,301 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 159 transitions, 451 flow [2022-07-22 21:36:21,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 125.36363636363636) internal successors, (1379), 11 states have internal predecessors, (1379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,301 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:21,302 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:21,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 21:36:21,511 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,SelfDestructingSolverStorable7 [2022-07-22 21:36:21,512 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:21,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1035696176, now seen corresponding path program 1 times [2022-07-22 21:36:21,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:21,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906980524] [2022-07-22 21:36:21,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:21,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:21,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:21,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:21,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:21,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906980524] [2022-07-22 21:36:21,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906980524] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:21,942 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:21,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-22 21:36:21,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71118940] [2022-07-22 21:36:21,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:21,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:36:21,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:21,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:36:21,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:36:21,945 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-22 21:36:21,946 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 159 transitions, 451 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:21,946 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:21,946 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-22 21:36:21,946 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:22,954 INFO L129 PetriNetUnfolder]: 2027/4160 cut-off events. [2022-07-22 21:36:22,954 INFO L130 PetriNetUnfolder]: For 1852/1852 co-relation queries the response was YES. [2022-07-22 21:36:22,961 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8787 conditions, 4160 events. 2027/4160 cut-off events. For 1852/1852 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 29629 event pairs, 539 based on Foata normal form. 0/3892 useless extension candidates. Maximal degree in co-relation 8774. Up to 1677 conditions per place. [2022-07-22 21:36:22,974 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 139 selfloop transitions, 44 changer transitions 44/320 dead transitions. [2022-07-22 21:36:22,974 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 320 transitions, 1313 flow [2022-07-22 21:36:22,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 21:36:22,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2022-07-22 21:36:22,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 3451 transitions. [2022-07-22 21:36:22,980 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6397849462365591 [2022-07-22 21:36:22,980 INFO L72 ComplementDD]: Start complementDD. Operand 31 states and 3451 transitions. [2022-07-22 21:36:22,980 INFO L73 IsDeterministic]: Start isDeterministic. Operand 31 states and 3451 transitions. [2022-07-22 21:36:22,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:22,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 31 states and 3451 transitions. [2022-07-22 21:36:22,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 32 states, 31 states have (on average 111.3225806451613) internal successors, (3451), 31 states have internal predecessors, (3451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:22,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:22,995 INFO L81 ComplementDD]: Finished complementDD. Result has 32 states, 32 states have (on average 174.0) internal successors, (5568), 32 states have internal predecessors, (5568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:22,996 INFO L186 Difference]: Start difference. First operand has 182 places, 159 transitions, 451 flow. Second operand 31 states and 3451 transitions. [2022-07-22 21:36:22,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 320 transitions, 1313 flow [2022-07-22 21:36:22,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 320 transitions, 1278 flow, removed 2 selfloop flow, removed 11 redundant places. [2022-07-22 21:36:23,002 INFO L242 Difference]: Finished difference. Result has 214 places, 185 transitions, 693 flow [2022-07-22 21:36:23,003 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=693, PETRI_PLACES=214, PETRI_TRANSITIONS=185} [2022-07-22 21:36:23,003 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 59 predicate places. [2022-07-22 21:36:23,003 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 185 transitions, 693 flow [2022-07-22 21:36:23,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:23,005 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:23,005 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:23,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 21:36:23,005 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:23,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:23,005 INFO L85 PathProgramCache]: Analyzing trace with hash 2019158248, now seen corresponding path program 2 times [2022-07-22 21:36:23,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:23,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28611526] [2022-07-22 21:36:23,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:23,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:23,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:23,408 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:23,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:23,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28611526] [2022-07-22 21:36:23,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28611526] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:23,409 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:23,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:36:23,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565667012] [2022-07-22 21:36:23,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:23,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:36:23,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:23,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:36:23,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:36:23,412 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-22 21:36:23,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 185 transitions, 693 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:23,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:23,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-22 21:36:23,414 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:24,528 INFO L129 PetriNetUnfolder]: 2117/4258 cut-off events. [2022-07-22 21:36:24,529 INFO L130 PetriNetUnfolder]: For 4741/4759 co-relation queries the response was YES. [2022-07-22 21:36:24,539 INFO L84 FinitePrefix]: Finished finitePrefix Result has 11657 conditions, 4258 events. 2117/4258 cut-off events. For 4741/4759 co-relation queries the response was YES. Maximal size of possible extension queue 189. Compared 30063 event pairs, 624 based on Foata normal form. 35/4268 useless extension candidates. Maximal degree in co-relation 11631. Up to 1677 conditions per place. [2022-07-22 21:36:24,554 INFO L132 encePairwiseOnDemand]: 144/174 looper letters, 214 selfloop transitions, 76 changer transitions 1/384 dead transitions. [2022-07-22 21:36:24,554 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 384 transitions, 2155 flow [2022-07-22 21:36:24,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 21:36:24,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-07-22 21:36:24,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3893 transitions. [2022-07-22 21:36:24,561 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6392446633825944 [2022-07-22 21:36:24,561 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3893 transitions. [2022-07-22 21:36:24,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3893 transitions. [2022-07-22 21:36:24,563 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:24,563 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3893 transitions. [2022-07-22 21:36:24,570 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 111.22857142857143) internal successors, (3893), 35 states have internal predecessors, (3893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:24,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:24,578 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:24,578 INFO L186 Difference]: Start difference. First operand has 214 places, 185 transitions, 693 flow. Second operand 35 states and 3893 transitions. [2022-07-22 21:36:24,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 384 transitions, 2155 flow [2022-07-22 21:36:24,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 384 transitions, 2053 flow, removed 21 selfloop flow, removed 19 redundant places. [2022-07-22 21:36:24,600 INFO L242 Difference]: Finished difference. Result has 239 places, 233 transitions, 1207 flow [2022-07-22 21:36:24,602 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=639, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1207, PETRI_PLACES=239, PETRI_TRANSITIONS=233} [2022-07-22 21:36:24,602 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 84 predicate places. [2022-07-22 21:36:24,602 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 233 transitions, 1207 flow [2022-07-22 21:36:24,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:24,603 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:24,603 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:24,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 21:36:24,603 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:24,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1430989882, now seen corresponding path program 3 times [2022-07-22 21:36:24,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:24,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159735097] [2022-07-22 21:36:24,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:24,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:24,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:25,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:25,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:25,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159735097] [2022-07-22 21:36:25,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159735097] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:25,221 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:25,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 21:36:25,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611706203] [2022-07-22 21:36:25,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:25,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:36:25,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:25,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:36:25,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:36:25,224 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2022-07-22 21:36:25,226 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 233 transitions, 1207 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:25,226 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:25,226 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2022-07-22 21:36:25,226 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:26,658 INFO L129 PetriNetUnfolder]: 2144/4352 cut-off events. [2022-07-22 21:36:26,658 INFO L130 PetriNetUnfolder]: For 8280/8298 co-relation queries the response was YES. [2022-07-22 21:36:26,673 INFO L84 FinitePrefix]: Finished finitePrefix Result has 13844 conditions, 4352 events. 2144/4352 cut-off events. For 8280/8298 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 31322 event pairs, 669 based on Foata normal form. 20/4348 useless extension candidates. Maximal degree in co-relation 13804. Up to 1678 conditions per place. [2022-07-22 21:36:26,691 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 147 selfloop transitions, 79 changer transitions 40/356 dead transitions. [2022-07-22 21:36:26,691 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 356 transitions, 2361 flow [2022-07-22 21:36:26,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 21:36:26,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-07-22 21:36:26,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3381 transitions. [2022-07-22 21:36:26,695 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6072198275862069 [2022-07-22 21:36:26,695 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3381 transitions. [2022-07-22 21:36:26,695 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3381 transitions. [2022-07-22 21:36:26,696 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:26,696 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3381 transitions. [2022-07-22 21:36:26,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 105.65625) internal successors, (3381), 32 states have internal predecessors, (3381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:26,706 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:26,707 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 174.0) internal successors, (5742), 33 states have internal predecessors, (5742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:26,707 INFO L186 Difference]: Start difference. First operand has 239 places, 233 transitions, 1207 flow. Second operand 32 states and 3381 transitions. [2022-07-22 21:36:26,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 356 transitions, 2361 flow [2022-07-22 21:36:26,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 356 transitions, 2277 flow, removed 16 selfloop flow, removed 17 redundant places. [2022-07-22 21:36:26,746 INFO L242 Difference]: Finished difference. Result has 264 places, 244 transitions, 1501 flow [2022-07-22 21:36:26,747 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1501, PETRI_PLACES=264, PETRI_TRANSITIONS=244} [2022-07-22 21:36:26,747 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 109 predicate places. [2022-07-22 21:36:26,747 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 244 transitions, 1501 flow [2022-07-22 21:36:26,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:26,748 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:26,748 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:26,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-22 21:36:26,748 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:26,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:26,749 INFO L85 PathProgramCache]: Analyzing trace with hash -2113386508, now seen corresponding path program 1 times [2022-07-22 21:36:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:26,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175700306] [2022-07-22 21:36:26,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:26,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:26,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:27,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:27,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175700306] [2022-07-22 21:36:27,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175700306] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:27,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:27,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:36:27,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824924879] [2022-07-22 21:36:27,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:27,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:36:27,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:27,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:36:27,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:36:27,183 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-22 21:36:27,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 264 places, 244 transitions, 1501 flow. Second operand has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:27,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:27,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-22 21:36:27,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:28,695 INFO L129 PetriNetUnfolder]: 2837/5702 cut-off events. [2022-07-22 21:36:28,696 INFO L130 PetriNetUnfolder]: For 16087/16100 co-relation queries the response was YES. [2022-07-22 21:36:28,724 INFO L84 FinitePrefix]: Finished finitePrefix Result has 19734 conditions, 5702 events. 2837/5702 cut-off events. For 16087/16100 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 43469 event pairs, 337 based on Foata normal form. 44/5715 useless extension candidates. Maximal degree in co-relation 19682. Up to 1718 conditions per place. [2022-07-22 21:36:28,744 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 266 selfloop transitions, 111 changer transitions 1/471 dead transitions. [2022-07-22 21:36:28,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 471 transitions, 3612 flow [2022-07-22 21:36:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 21:36:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-22 21:36:28,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 4064 transitions. [2022-07-22 21:36:28,748 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.648786717752235 [2022-07-22 21:36:28,748 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 4064 transitions. [2022-07-22 21:36:28,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 4064 transitions. [2022-07-22 21:36:28,749 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:28,749 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 4064 transitions. [2022-07-22 21:36:28,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 112.88888888888889) internal successors, (4064), 36 states have internal predecessors, (4064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:28,759 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:28,760 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:28,760 INFO L186 Difference]: Start difference. First operand has 264 places, 244 transitions, 1501 flow. Second operand 36 states and 4064 transitions. [2022-07-22 21:36:28,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 471 transitions, 3612 flow [2022-07-22 21:36:28,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 271 places, 471 transitions, 3437 flow, removed 53 selfloop flow, removed 22 redundant places. [2022-07-22 21:36:28,836 INFO L242 Difference]: Finished difference. Result has 282 places, 292 transitions, 2217 flow [2022-07-22 21:36:28,837 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1413, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=2217, PETRI_PLACES=282, PETRI_TRANSITIONS=292} [2022-07-22 21:36:28,837 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 127 predicate places. [2022-07-22 21:36:28,837 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 292 transitions, 2217 flow [2022-07-22 21:36:28,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 106.55) internal successors, (2131), 20 states have internal predecessors, (2131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:28,838 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:28,838 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:28,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 21:36:28,839 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:28,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:28,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1472592122, now seen corresponding path program 2 times [2022-07-22 21:36:28,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:28,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871471514] [2022-07-22 21:36:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:28,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:29,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:29,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871471514] [2022-07-22 21:36:29,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871471514] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:29,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:29,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-22 21:36:29,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856778166] [2022-07-22 21:36:29,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:29,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:36:29,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:29,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:36:29,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:36:29,282 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-22 21:36:29,283 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 292 transitions, 2217 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:29,283 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:29,283 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-22 21:36:29,283 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:30,609 INFO L129 PetriNetUnfolder]: 2853/5760 cut-off events. [2022-07-22 21:36:30,609 INFO L130 PetriNetUnfolder]: For 18750/18769 co-relation queries the response was YES. [2022-07-22 21:36:30,648 INFO L84 FinitePrefix]: Finished finitePrefix Result has 20795 conditions, 5760 events. 2853/5760 cut-off events. For 18750/18769 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 44206 event pairs, 720 based on Foata normal form. 10/5735 useless extension candidates. Maximal degree in co-relation 20737. Up to 2754 conditions per place. [2022-07-22 21:36:30,669 INFO L132 encePairwiseOnDemand]: 144/174 looper letters, 186 selfloop transitions, 98 changer transitions 28/405 dead transitions. [2022-07-22 21:36:30,669 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 405 transitions, 3568 flow [2022-07-22 21:36:30,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-22 21:36:30,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2022-07-22 21:36:30,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 3314 transitions. [2022-07-22 21:36:30,673 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6348659003831417 [2022-07-22 21:36:30,673 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 3314 transitions. [2022-07-22 21:36:30,673 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 3314 transitions. [2022-07-22 21:36:30,674 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:30,674 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 3314 transitions. [2022-07-22 21:36:30,678 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 110.46666666666667) internal successors, (3314), 30 states have internal predecessors, (3314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:30,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:30,683 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 174.0) internal successors, (5394), 31 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:30,683 INFO L186 Difference]: Start difference. First operand has 282 places, 292 transitions, 2217 flow. Second operand 30 states and 3314 transitions. [2022-07-22 21:36:30,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 405 transitions, 3568 flow [2022-07-22 21:36:30,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 405 transitions, 3423 flow, removed 51 selfloop flow, removed 15 redundant places. [2022-07-22 21:36:30,797 INFO L242 Difference]: Finished difference. Result has 301 places, 304 transitions, 2450 flow [2022-07-22 21:36:30,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2092, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=292, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=2450, PETRI_PLACES=301, PETRI_TRANSITIONS=304} [2022-07-22 21:36:30,798 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 146 predicate places. [2022-07-22 21:36:30,798 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 304 transitions, 2450 flow [2022-07-22 21:36:30,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:30,799 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:30,799 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:30,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-22 21:36:30,800 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:30,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:30,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1133456434, now seen corresponding path program 3 times [2022-07-22 21:36:30,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:30,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005223780] [2022-07-22 21:36:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:30,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:31,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:31,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:31,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005223780] [2022-07-22 21:36:31,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005223780] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:31,460 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:31,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-22 21:36:31,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018033890] [2022-07-22 21:36:31,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:31,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 21:36:31,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:31,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 21:36:31,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2022-07-22 21:36:31,464 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-07-22 21:36:31,466 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 304 transitions, 2450 flow. Second operand has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:31,466 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:31,466 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-07-22 21:36:31,466 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:33,650 INFO L129 PetriNetUnfolder]: 3451/6773 cut-off events. [2022-07-22 21:36:33,650 INFO L130 PetriNetUnfolder]: For 18981/19000 co-relation queries the response was YES. [2022-07-22 21:36:33,682 INFO L84 FinitePrefix]: Finished finitePrefix Result has 23681 conditions, 6773 events. 3451/6773 cut-off events. For 18981/19000 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 53322 event pairs, 543 based on Foata normal form. 48/6787 useless extension candidates. Maximal degree in co-relation 23618. Up to 1701 conditions per place. [2022-07-22 21:36:33,703 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 243 selfloop transitions, 157 changer transitions 3/490 dead transitions. [2022-07-22 21:36:33,704 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 490 transitions, 4315 flow [2022-07-22 21:36:33,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 21:36:33,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-07-22 21:36:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 3713 transitions. [2022-07-22 21:36:33,707 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5927522349936143 [2022-07-22 21:36:33,707 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 3713 transitions. [2022-07-22 21:36:33,707 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 3713 transitions. [2022-07-22 21:36:33,708 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:33,708 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 3713 transitions. [2022-07-22 21:36:33,712 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 103.13888888888889) internal successors, (3713), 36 states have internal predecessors, (3713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:33,718 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:33,719 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 174.0) internal successors, (6438), 37 states have internal predecessors, (6438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:33,719 INFO L186 Difference]: Start difference. First operand has 301 places, 304 transitions, 2450 flow. Second operand 36 states and 3713 transitions. [2022-07-22 21:36:33,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 490 transitions, 4315 flow [2022-07-22 21:36:33,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 490 transitions, 4108 flow, removed 33 selfloop flow, removed 23 redundant places. [2022-07-22 21:36:33,822 INFO L242 Difference]: Finished difference. Result has 317 places, 333 transitions, 3063 flow [2022-07-22 21:36:33,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=3063, PETRI_PLACES=317, PETRI_TRANSITIONS=333} [2022-07-22 21:36:33,823 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 162 predicate places. [2022-07-22 21:36:33,823 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 333 transitions, 3063 flow [2022-07-22 21:36:33,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 97.5909090909091) internal successors, (2147), 22 states have internal predecessors, (2147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:33,823 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:33,824 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:33,824 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 21:36:33,825 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:33,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1562019108, now seen corresponding path program 4 times [2022-07-22 21:36:33,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:33,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556833628] [2022-07-22 21:36:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:33,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:34,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:34,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:34,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556833628] [2022-07-22 21:36:34,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556833628] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:34,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:34,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-22 21:36:34,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215717426] [2022-07-22 21:36:34,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:34,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:36:34,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:34,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:36:34,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:36:34,191 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-22 21:36:34,192 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 333 transitions, 3063 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:34,192 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:34,192 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-22 21:36:34,192 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:35,887 INFO L129 PetriNetUnfolder]: 3548/7008 cut-off events. [2022-07-22 21:36:35,887 INFO L130 PetriNetUnfolder]: For 27000/27019 co-relation queries the response was YES. [2022-07-22 21:36:35,926 INFO L84 FinitePrefix]: Finished finitePrefix Result has 26374 conditions, 7008 events. 3548/7008 cut-off events. For 27000/27019 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 55486 event pairs, 1163 based on Foata normal form. 12/6971 useless extension candidates. Maximal degree in co-relation 26307. Up to 3808 conditions per place. [2022-07-22 21:36:35,953 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 196 selfloop transitions, 154 changer transitions 0/443 dead transitions. [2022-07-22 21:36:35,953 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 443 transitions, 4663 flow [2022-07-22 21:36:35,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 21:36:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-22 21:36:35,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3216 transitions. [2022-07-22 21:36:35,956 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6373365041617123 [2022-07-22 21:36:35,956 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3216 transitions. [2022-07-22 21:36:35,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3216 transitions. [2022-07-22 21:36:35,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:35,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3216 transitions. [2022-07-22 21:36:35,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.89655172413794) internal successors, (3216), 29 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:35,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:35,966 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:35,967 INFO L186 Difference]: Start difference. First operand has 317 places, 333 transitions, 3063 flow. Second operand 29 states and 3216 transitions. [2022-07-22 21:36:35,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 443 transitions, 4663 flow [2022-07-22 21:36:36,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 443 transitions, 4531 flow, removed 32 selfloop flow, removed 18 redundant places. [2022-07-22 21:36:36,127 INFO L242 Difference]: Finished difference. Result has 334 places, 364 transitions, 3858 flow [2022-07-22 21:36:36,128 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=3858, PETRI_PLACES=334, PETRI_TRANSITIONS=364} [2022-07-22 21:36:36,128 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 179 predicate places. [2022-07-22 21:36:36,129 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 364 transitions, 3858 flow [2022-07-22 21:36:36,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:36,129 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:36,130 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:36,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-22 21:36:36,130 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:36,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:36,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1785868166, now seen corresponding path program 5 times [2022-07-22 21:36:36,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:36,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117854740] [2022-07-22 21:36:36,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:36,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:36,465 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:36,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:36,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117854740] [2022-07-22 21:36:36,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117854740] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:36,466 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:36,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-22 21:36:36,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532914633] [2022-07-22 21:36:36,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:36,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:36:36,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:36,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:36:36,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:36:36,468 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-22 21:36:36,469 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 364 transitions, 3858 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:36,469 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:36,469 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-22 21:36:36,469 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:38,157 INFO L129 PetriNetUnfolder]: 3659/7154 cut-off events. [2022-07-22 21:36:38,157 INFO L130 PetriNetUnfolder]: For 27042/27061 co-relation queries the response was YES. [2022-07-22 21:36:38,200 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27322 conditions, 7154 events. 3659/7154 cut-off events. For 27042/27061 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 56519 event pairs, 1384 based on Foata normal form. 16/7120 useless extension candidates. Maximal degree in co-relation 27249. Up to 3808 conditions per place. [2022-07-22 21:36:38,221 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 231 selfloop transitions, 154 changer transitions 0/478 dead transitions. [2022-07-22 21:36:38,221 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 478 transitions, 5677 flow [2022-07-22 21:36:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 21:36:38,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-22 21:36:38,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3225 transitions. [2022-07-22 21:36:38,224 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6391200951248514 [2022-07-22 21:36:38,224 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3225 transitions. [2022-07-22 21:36:38,224 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3225 transitions. [2022-07-22 21:36:38,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:38,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3225 transitions. [2022-07-22 21:36:38,228 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 111.20689655172414) internal successors, (3225), 29 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:38,232 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:38,232 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:38,232 INFO L186 Difference]: Start difference. First operand has 334 places, 364 transitions, 3858 flow. Second operand 29 states and 3225 transitions. [2022-07-22 21:36:38,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 478 transitions, 5677 flow [2022-07-22 21:36:38,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 478 transitions, 5547 flow, removed 4 selfloop flow, removed 18 redundant places. [2022-07-22 21:36:38,384 INFO L242 Difference]: Finished difference. Result has 353 places, 401 transitions, 4820 flow [2022-07-22 21:36:38,384 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3744, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=4820, PETRI_PLACES=353, PETRI_TRANSITIONS=401} [2022-07-22 21:36:38,385 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 198 predicate places. [2022-07-22 21:36:38,385 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 401 transitions, 4820 flow [2022-07-22 21:36:38,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:38,385 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:38,385 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:38,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-22 21:36:38,385 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:38,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1680799936, now seen corresponding path program 6 times [2022-07-22 21:36:38,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:38,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200615187] [2022-07-22 21:36:38,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:38,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:38,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:38,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200615187] [2022-07-22 21:36:38,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200615187] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:38,821 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:38,821 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-22 21:36:38,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545216207] [2022-07-22 21:36:38,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:38,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:36:38,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:38,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:36:38,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:36:38,824 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-22 21:36:38,825 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 401 transitions, 4820 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:38,825 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:38,825 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-22 21:36:38,825 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:40,624 INFO L129 PetriNetUnfolder]: 3671/7210 cut-off events. [2022-07-22 21:36:40,624 INFO L130 PetriNetUnfolder]: For 32094/32113 co-relation queries the response was YES. [2022-07-22 21:36:40,675 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28103 conditions, 7210 events. 3671/7210 cut-off events. For 32094/32113 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 57034 event pairs, 1341 based on Foata normal form. 12/7176 useless extension candidates. Maximal degree in co-relation 28021. Up to 3808 conditions per place. [2022-07-22 21:36:40,698 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 211 selfloop transitions, 183 changer transitions 1/488 dead transitions. [2022-07-22 21:36:40,698 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 488 transitions, 6259 flow [2022-07-22 21:36:40,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 21:36:40,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-22 21:36:40,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3216 transitions. [2022-07-22 21:36:40,701 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6373365041617123 [2022-07-22 21:36:40,701 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3216 transitions. [2022-07-22 21:36:40,701 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3216 transitions. [2022-07-22 21:36:40,701 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:40,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3216 transitions. [2022-07-22 21:36:40,704 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.89655172413794) internal successors, (3216), 29 states have internal predecessors, (3216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:40,708 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:40,708 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:40,708 INFO L186 Difference]: Start difference. First operand has 353 places, 401 transitions, 4820 flow. Second operand 29 states and 3216 transitions. [2022-07-22 21:36:40,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 488 transitions, 6259 flow [2022-07-22 21:36:40,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 488 transitions, 6033 flow, removed 29 selfloop flow, removed 18 redundant places. [2022-07-22 21:36:40,883 INFO L242 Difference]: Finished difference. Result has 370 places, 410 transitions, 5279 flow [2022-07-22 21:36:40,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=4607, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=174, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5279, PETRI_PLACES=370, PETRI_TRANSITIONS=410} [2022-07-22 21:36:40,884 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 215 predicate places. [2022-07-22 21:36:40,884 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 410 transitions, 5279 flow [2022-07-22 21:36:40,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:40,884 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:40,884 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:40,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-22 21:36:40,884 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:40,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:40,885 INFO L85 PathProgramCache]: Analyzing trace with hash -403227108, now seen corresponding path program 4 times [2022-07-22 21:36:40,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:40,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115430039] [2022-07-22 21:36:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:40,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:40,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:41,288 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:41,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:41,289 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115430039] [2022-07-22 21:36:41,289 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115430039] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:41,289 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:41,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-07-22 21:36:41,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573811809] [2022-07-22 21:36:41,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:41,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-22 21:36:41,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:41,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-22 21:36:41,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2022-07-22 21:36:41,291 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 174 [2022-07-22 21:36:41,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 410 transitions, 5279 flow. Second operand has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:41,292 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:41,292 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 174 [2022-07-22 21:36:41,292 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:43,140 INFO L129 PetriNetUnfolder]: 3672/7214 cut-off events. [2022-07-22 21:36:43,141 INFO L130 PetriNetUnfolder]: For 35564/35583 co-relation queries the response was YES. [2022-07-22 21:36:43,187 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28655 conditions, 7214 events. 3672/7214 cut-off events. For 35564/35583 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 57214 event pairs, 1367 based on Foata normal form. 14/7185 useless extension candidates. Maximal degree in co-relation 28568. Up to 3808 conditions per place. [2022-07-22 21:36:43,208 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 246 selfloop transitions, 133 changer transitions 12/484 dead transitions. [2022-07-22 21:36:43,208 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 484 transitions, 6531 flow [2022-07-22 21:36:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 21:36:43,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-22 21:36:43,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3205 transitions. [2022-07-22 21:36:43,211 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6351565596512089 [2022-07-22 21:36:43,211 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3205 transitions. [2022-07-22 21:36:43,211 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3205 transitions. [2022-07-22 21:36:43,212 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:43,212 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3205 transitions. [2022-07-22 21:36:43,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 110.51724137931035) internal successors, (3205), 29 states have internal predecessors, (3205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:43,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:43,219 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:43,219 INFO L186 Difference]: Start difference. First operand has 370 places, 410 transitions, 5279 flow. Second operand 29 states and 3205 transitions. [2022-07-22 21:36:43,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 484 transitions, 6531 flow [2022-07-22 21:36:43,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 484 transitions, 6305 flow, removed 34 selfloop flow, removed 24 redundant places. [2022-07-22 21:36:43,409 INFO L242 Difference]: Finished difference. Result has 379 places, 413 transitions, 5410 flow [2022-07-22 21:36:43,410 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5066, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=410, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=5410, PETRI_PLACES=379, PETRI_TRANSITIONS=413} [2022-07-22 21:36:43,410 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 224 predicate places. [2022-07-22 21:36:43,410 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 413 transitions, 5410 flow [2022-07-22 21:36:43,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 106.6842105263158) internal successors, (2027), 19 states have internal predecessors, (2027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:43,410 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:43,411 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:43,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-22 21:36:43,411 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:43,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:43,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1821375558, now seen corresponding path program 5 times [2022-07-22 21:36:43,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:43,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715683284] [2022-07-22 21:36:43,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:43,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:43,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:43,899 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:43,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715683284] [2022-07-22 21:36:43,899 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715683284] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:36:43,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590892569] [2022-07-22 21:36:43,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 21:36:43,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:43,899 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:36:43,900 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:36:43,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 21:36:43,983 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 21:36:43,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:36:43,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 74 conjunts are in the unsatisfiable core [2022-07-22 21:36:43,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:36:44,023 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:36:44,065 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-22 21:36:44,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-22 21:36:44,230 INFO L356 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2022-07-22 21:36:44,230 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 33 [2022-07-22 21:36:44,401 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:36:44,893 INFO L356 Elim1Store]: treesize reduction 20, result has 39.4 percent of original size [2022-07-22 21:36:44,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 25 [2022-07-22 21:36:45,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:36:45,310 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:36:45,583 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 23 [2022-07-22 21:36:45,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 10 [2022-07-22 21:36:45,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:45,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:36:47,014 INFO L356 Elim1Store]: treesize reduction 23, result has 60.3 percent of original size [2022-07-22 21:36:47,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 182 treesize of output 88 [2022-07-22 21:36:47,116 INFO L356 Elim1Store]: treesize reduction 39, result has 76.1 percent of original size [2022-07-22 21:36:47,116 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 878 treesize of output 853 [2022-07-22 21:36:47,157 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:36:47,157 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 712 treesize of output 696 [2022-07-22 21:36:47,180 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:36:47,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 566 treesize of output 420 [2022-07-22 21:36:51,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:36:51,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590892569] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:36:51,253 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:36:51,253 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 26] total 65 [2022-07-22 21:36:51,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292800221] [2022-07-22 21:36:51,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:36:51,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 21:36:51,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:51,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 21:36:51,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=3705, Unknown=86, NotChecked=0, Total=4160 [2022-07-22 21:36:51,258 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2022-07-22 21:36:51,261 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 413 transitions, 5410 flow. Second operand has 65 states, 65 states have (on average 86.58461538461539) internal successors, (5628), 65 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:51,261 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:51,261 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2022-07-22 21:36:51,261 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:55,879 INFO L129 PetriNetUnfolder]: 3542/6859 cut-off events. [2022-07-22 21:36:55,879 INFO L130 PetriNetUnfolder]: For 35721/35740 co-relation queries the response was YES. [2022-07-22 21:36:55,954 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27809 conditions, 6859 events. 3542/6859 cut-off events. For 35721/35740 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 53037 event pairs, 407 based on Foata normal form. 40/6873 useless extension candidates. Maximal degree in co-relation 27725. Up to 1819 conditions per place. [2022-07-22 21:36:55,984 INFO L132 encePairwiseOnDemand]: 137/174 looper letters, 299 selfloop transitions, 245 changer transitions 4/621 dead transitions. [2022-07-22 21:36:55,984 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 621 transitions, 7708 flow [2022-07-22 21:36:55,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-22 21:36:55,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2022-07-22 21:36:55,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 4378 transitions. [2022-07-22 21:36:55,989 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5241858237547893 [2022-07-22 21:36:55,989 INFO L72 ComplementDD]: Start complementDD. Operand 48 states and 4378 transitions. [2022-07-22 21:36:55,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 48 states and 4378 transitions. [2022-07-22 21:36:55,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:55,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 48 states and 4378 transitions. [2022-07-22 21:36:55,995 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 49 states, 48 states have (on average 91.20833333333333) internal successors, (4378), 48 states have internal predecessors, (4378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:56,001 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 49 states, 49 states have (on average 174.0) internal successors, (8526), 49 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:56,001 INFO L81 ComplementDD]: Finished complementDD. Result has 49 states, 49 states have (on average 174.0) internal successors, (8526), 49 states have internal predecessors, (8526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:56,001 INFO L186 Difference]: Start difference. First operand has 379 places, 413 transitions, 5410 flow. Second operand 48 states and 4378 transitions. [2022-07-22 21:36:56,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 621 transitions, 7708 flow [2022-07-22 21:36:56,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 621 transitions, 7543 flow, removed 24 selfloop flow, removed 21 redundant places. [2022-07-22 21:36:56,238 INFO L242 Difference]: Finished difference. Result has 406 places, 424 transitions, 5992 flow [2022-07-22 21:36:56,238 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5268, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=413, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=235, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=5992, PETRI_PLACES=406, PETRI_TRANSITIONS=424} [2022-07-22 21:36:56,238 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 251 predicate places. [2022-07-22 21:36:56,238 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 424 transitions, 5992 flow [2022-07-22 21:36:56,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 86.58461538461539) internal successors, (5628), 65 states have internal predecessors, (5628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:56,239 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:56,240 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:56,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-07-22 21:36:56,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:36:56,440 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:56,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:56,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1841134454, now seen corresponding path program 7 times [2022-07-22 21:36:56,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:56,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791516060] [2022-07-22 21:36:56,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:56,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:56,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:56,947 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:56,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:56,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791516060] [2022-07-22 21:36:56,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791516060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:56,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:56,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 21:36:56,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381331941] [2022-07-22 21:36:56,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:56,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:36:56,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:56,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:36:56,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:36:56,949 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-07-22 21:36:56,950 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 424 transitions, 5992 flow. Second operand has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:56,950 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:56,950 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-07-22 21:36:56,950 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:36:58,945 INFO L129 PetriNetUnfolder]: 3656/7069 cut-off events. [2022-07-22 21:36:58,946 INFO L130 PetriNetUnfolder]: For 46552/46571 co-relation queries the response was YES. [2022-07-22 21:36:59,015 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31093 conditions, 7069 events. 3656/7069 cut-off events. For 46552/46571 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 54851 event pairs, 1105 based on Foata normal form. 32/7054 useless extension candidates. Maximal degree in co-relation 31010. Up to 3604 conditions per place. [2022-07-22 21:36:59,047 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 243 selfloop transitions, 211 changer transitions 0/541 dead transitions. [2022-07-22 21:36:59,047 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 541 transitions, 8276 flow [2022-07-22 21:36:59,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 21:36:59,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-22 21:36:59,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2660 transitions. [2022-07-22 21:36:59,050 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5879752431476569 [2022-07-22 21:36:59,050 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2660 transitions. [2022-07-22 21:36:59,050 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2660 transitions. [2022-07-22 21:36:59,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:36:59,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2660 transitions. [2022-07-22 21:36:59,053 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 102.3076923076923) internal successors, (2660), 26 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:59,055 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:59,056 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:59,056 INFO L186 Difference]: Start difference. First operand has 406 places, 424 transitions, 5992 flow. Second operand 26 states and 2660 transitions. [2022-07-22 21:36:59,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 541 transitions, 8276 flow [2022-07-22 21:36:59,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 541 transitions, 7491 flow, removed 28 selfloop flow, removed 41 redundant places. [2022-07-22 21:36:59,341 INFO L242 Difference]: Finished difference. Result has 396 places, 472 transitions, 6886 flow [2022-07-22 21:36:59,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5327, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6886, PETRI_PLACES=396, PETRI_TRANSITIONS=472} [2022-07-22 21:36:59,342 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 241 predicate places. [2022-07-22 21:36:59,342 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 472 transitions, 6886 flow [2022-07-22 21:36:59,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:59,342 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:36:59,343 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:36:59,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-22 21:36:59,343 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:36:59,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:36:59,343 INFO L85 PathProgramCache]: Analyzing trace with hash 773073508, now seen corresponding path program 6 times [2022-07-22 21:36:59,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:36:59,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049915027] [2022-07-22 21:36:59,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:36:59,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:36:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:36:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:36:59,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:36:59,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049915027] [2022-07-22 21:36:59,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049915027] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:36:59,950 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:36:59,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 21:36:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271744572] [2022-07-22 21:36:59,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:36:59,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:36:59,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:36:59,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:36:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:36:59,955 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-07-22 21:36:59,956 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 472 transitions, 6886 flow. Second operand has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:36:59,956 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:36:59,956 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-07-22 21:36:59,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:02,144 INFO L129 PetriNetUnfolder]: 3618/7019 cut-off events. [2022-07-22 21:37:02,144 INFO L130 PetriNetUnfolder]: For 41717/41736 co-relation queries the response was YES. [2022-07-22 21:37:02,221 INFO L84 FinitePrefix]: Finished finitePrefix Result has 29835 conditions, 7019 events. 3618/7019 cut-off events. For 41717/41736 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 54791 event pairs, 1110 based on Foata normal form. 28/7001 useless extension candidates. Maximal degree in co-relation 29749. Up to 3604 conditions per place. [2022-07-22 21:37:02,249 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 259 selfloop transitions, 177 changer transitions 7/530 dead transitions. [2022-07-22 21:37:02,249 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 421 places, 530 transitions, 7909 flow [2022-07-22 21:37:02,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 21:37:02,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-22 21:37:02,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2650 transitions. [2022-07-22 21:37:02,252 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5857648099027409 [2022-07-22 21:37:02,252 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2650 transitions. [2022-07-22 21:37:02,252 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2650 transitions. [2022-07-22 21:37:02,252 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:02,252 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2650 transitions. [2022-07-22 21:37:02,255 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 101.92307692307692) internal successors, (2650), 26 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:02,257 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:02,257 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:02,257 INFO L186 Difference]: Start difference. First operand has 396 places, 472 transitions, 6886 flow. Second operand 26 states and 2650 transitions. [2022-07-22 21:37:02,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 421 places, 530 transitions, 7909 flow [2022-07-22 21:37:02,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 530 transitions, 7654 flow, removed 19 selfloop flow, removed 21 redundant places. [2022-07-22 21:37:02,516 INFO L242 Difference]: Finished difference. Result has 403 places, 462 transitions, 6788 flow [2022-07-22 21:37:02,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=6788, PETRI_PLACES=403, PETRI_TRANSITIONS=462} [2022-07-22 21:37:02,517 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 248 predicate places. [2022-07-22 21:37:02,517 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 462 transitions, 6788 flow [2022-07-22 21:37:02,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:02,517 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:02,518 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:02,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-07-22 21:37:02,518 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:02,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:02,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1869552764, now seen corresponding path program 7 times [2022-07-22 21:37:02,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:02,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410818405] [2022-07-22 21:37:02,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:02,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:03,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:03,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410818405] [2022-07-22 21:37:03,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410818405] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:03,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:03,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-22 21:37:03,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763053768] [2022-07-22 21:37:03,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:03,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 21:37:03,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:03,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 21:37:03,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-07-22 21:37:03,091 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2022-07-22 21:37:03,092 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 462 transitions, 6788 flow. Second operand has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:03,092 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:03,092 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2022-07-22 21:37:03,092 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:05,513 INFO L129 PetriNetUnfolder]: 4296/8239 cut-off events. [2022-07-22 21:37:05,513 INFO L130 PetriNetUnfolder]: For 50387/50406 co-relation queries the response was YES. [2022-07-22 21:37:05,580 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35148 conditions, 8239 events. 4296/8239 cut-off events. For 50387/50406 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 66052 event pairs, 1137 based on Foata normal form. 76/8262 useless extension candidates. Maximal degree in co-relation 35061. Up to 3709 conditions per place. [2022-07-22 21:37:05,613 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 280 selfloop transitions, 244 changer transitions 0/614 dead transitions. [2022-07-22 21:37:05,613 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 614 transitions, 9013 flow [2022-07-22 21:37:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 21:37:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-22 21:37:05,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3516 transitions. [2022-07-22 21:37:05,721 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6123301985370951 [2022-07-22 21:37:05,721 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3516 transitions. [2022-07-22 21:37:05,721 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3516 transitions. [2022-07-22 21:37:05,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:05,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3516 transitions. [2022-07-22 21:37:05,724 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 106.54545454545455) internal successors, (3516), 33 states have internal predecessors, (3516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:05,733 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:05,734 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:05,734 INFO L186 Difference]: Start difference. First operand has 403 places, 462 transitions, 6788 flow. Second operand 33 states and 3516 transitions. [2022-07-22 21:37:05,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 614 transitions, 9013 flow [2022-07-22 21:37:06,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 614 transitions, 8748 flow, removed 4 selfloop flow, removed 20 redundant places. [2022-07-22 21:37:06,009 INFO L242 Difference]: Finished difference. Result has 420 places, 495 transitions, 7676 flow [2022-07-22 21:37:06,010 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6548, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=7676, PETRI_PLACES=420, PETRI_TRANSITIONS=495} [2022-07-22 21:37:06,010 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 265 predicate places. [2022-07-22 21:37:06,010 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 495 transitions, 7676 flow [2022-07-22 21:37:06,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 101.45454545454545) internal successors, (2232), 22 states have internal predecessors, (2232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:06,011 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:06,011 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:06,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-22 21:37:06,011 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:06,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:06,011 INFO L85 PathProgramCache]: Analyzing trace with hash 397189860, now seen corresponding path program 8 times [2022-07-22 21:37:06,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:06,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845831045] [2022-07-22 21:37:06,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:06,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:06,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:06,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:06,532 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845831045] [2022-07-22 21:37:06,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845831045] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:06,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:06,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 21:37:06,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281501241] [2022-07-22 21:37:06,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:06,533 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:37:06,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:06,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:37:06,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:37:06,534 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-07-22 21:37:06,535 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 495 transitions, 7676 flow. Second operand has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:06,535 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:06,535 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-07-22 21:37:06,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:08,853 INFO L129 PetriNetUnfolder]: 4266/8200 cut-off events. [2022-07-22 21:37:08,853 INFO L130 PetriNetUnfolder]: For 55803/55822 co-relation queries the response was YES. [2022-07-22 21:37:08,918 INFO L84 FinitePrefix]: Finished finitePrefix Result has 36496 conditions, 8200 events. 4266/8200 cut-off events. For 55803/55822 co-relation queries the response was YES. Maximal size of possible extension queue 465. Compared 66059 event pairs, 1248 based on Foata normal form. 20/8157 useless extension candidates. Maximal degree in co-relation 36405. Up to 4560 conditions per place. [2022-07-22 21:37:08,945 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 237 selfloop transitions, 231 changer transitions 0/555 dead transitions. [2022-07-22 21:37:08,945 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 555 transitions, 8848 flow [2022-07-22 21:37:08,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 21:37:08,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-22 21:37:08,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2749 transitions. [2022-07-22 21:37:08,948 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5851426138782461 [2022-07-22 21:37:08,948 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2749 transitions. [2022-07-22 21:37:08,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2749 transitions. [2022-07-22 21:37:08,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:08,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2749 transitions. [2022-07-22 21:37:08,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 101.81481481481481) internal successors, (2749), 27 states have internal predecessors, (2749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:08,953 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:08,953 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:08,953 INFO L186 Difference]: Start difference. First operand has 420 places, 495 transitions, 7676 flow. Second operand 27 states and 2749 transitions. [2022-07-22 21:37:08,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 555 transitions, 8848 flow [2022-07-22 21:37:09,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 555 transitions, 8618 flow, removed 15 selfloop flow, removed 21 redundant places. [2022-07-22 21:37:09,245 INFO L242 Difference]: Finished difference. Result has 426 places, 492 transitions, 7866 flow [2022-07-22 21:37:09,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7364, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=231, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=7866, PETRI_PLACES=426, PETRI_TRANSITIONS=492} [2022-07-22 21:37:09,246 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 271 predicate places. [2022-07-22 21:37:09,246 INFO L495 AbstractCegarLoop]: Abstraction has has 426 places, 492 transitions, 7866 flow [2022-07-22 21:37:09,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:09,247 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:09,247 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:09,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-22 21:37:09,247 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:09,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:09,247 INFO L85 PathProgramCache]: Analyzing trace with hash -714716454, now seen corresponding path program 9 times [2022-07-22 21:37:09,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:09,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035062755] [2022-07-22 21:37:09,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:09,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:09,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:09,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:09,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:09,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035062755] [2022-07-22 21:37:09,771 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035062755] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:37:09,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516184012] [2022-07-22 21:37:09,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 21:37:09,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:37:09,771 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:37:09,772 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:37:09,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 21:37:09,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-22 21:37:09,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:37:09,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 61 conjunts are in the unsatisfiable core [2022-07-22 21:37:09,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:37:09,907 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:37:10,088 INFO L356 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-07-22 21:37:10,088 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-07-22 21:37:10,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:37:10,840 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:37:11,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:37:11,031 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-22 21:37:11,031 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:37:11,135 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:37:11,135 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 25 [2022-07-22 21:37:11,187 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:37:11,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:37:11,642 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:37:11,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 70 [2022-07-22 21:37:11,685 INFO L356 Elim1Store]: treesize reduction 39, result has 64.2 percent of original size [2022-07-22 21:37:11,686 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 924 treesize of output 833 [2022-07-22 21:37:11,700 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:37:11,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 694 treesize of output 518 [2022-07-22 21:37:11,736 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:37:11,737 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 572 treesize of output 548 [2022-07-22 21:37:13,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-22 21:37:13,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-22 21:37:13,416 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516184012] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:37:13,416 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:37:13,416 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 23] total 61 [2022-07-22 21:37:13,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768243760] [2022-07-22 21:37:13,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:37:13,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-22 21:37:13,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:13,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-22 21:37:13,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=3318, Unknown=30, NotChecked=0, Total=3660 [2022-07-22 21:37:13,420 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2022-07-22 21:37:13,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 426 places, 492 transitions, 7866 flow. Second operand has 61 states, 61 states have (on average 86.70491803278688) internal successors, (5289), 61 states have internal predecessors, (5289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:13,422 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:13,422 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2022-07-22 21:37:13,422 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:17,957 INFO L129 PetriNetUnfolder]: 4541/8748 cut-off events. [2022-07-22 21:37:17,967 INFO L130 PetriNetUnfolder]: For 61914/61933 co-relation queries the response was YES. [2022-07-22 21:37:18,025 INFO L84 FinitePrefix]: Finished finitePrefix Result has 39634 conditions, 8748 events. 4541/8748 cut-off events. For 61914/61933 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 71586 event pairs, 901 based on Foata normal form. 68/8766 useless extension candidates. Maximal degree in co-relation 39544. Up to 3466 conditions per place. [2022-07-22 21:37:18,052 INFO L132 encePairwiseOnDemand]: 133/174 looper letters, 315 selfloop transitions, 366 changer transitions 2/756 dead transitions. [2022-07-22 21:37:18,052 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 756 transitions, 11354 flow [2022-07-22 21:37:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-07-22 21:37:18,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2022-07-22 21:37:18,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 4626 transitions. [2022-07-22 21:37:18,056 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5212981744421906 [2022-07-22 21:37:18,056 INFO L72 ComplementDD]: Start complementDD. Operand 51 states and 4626 transitions. [2022-07-22 21:37:18,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 51 states and 4626 transitions. [2022-07-22 21:37:18,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:18,057 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 51 states and 4626 transitions. [2022-07-22 21:37:18,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 52 states, 51 states have (on average 90.70588235294117) internal successors, (4626), 51 states have internal predecessors, (4626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:18,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 52 states, 52 states have (on average 174.0) internal successors, (9048), 52 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:18,066 INFO L81 ComplementDD]: Finished complementDD. Result has 52 states, 52 states have (on average 174.0) internal successors, (9048), 52 states have internal predecessors, (9048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:18,066 INFO L186 Difference]: Start difference. First operand has 426 places, 492 transitions, 7866 flow. Second operand 51 states and 4626 transitions. [2022-07-22 21:37:18,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 756 transitions, 11354 flow [2022-07-22 21:37:18,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 454 places, 756 transitions, 11042 flow, removed 2 selfloop flow, removed 22 redundant places. [2022-07-22 21:37:18,360 INFO L242 Difference]: Finished difference. Result has 465 places, 597 transitions, 9896 flow [2022-07-22 21:37:18,360 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=7579, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=51, PETRI_FLOW=9896, PETRI_PLACES=465, PETRI_TRANSITIONS=597} [2022-07-22 21:37:18,361 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 310 predicate places. [2022-07-22 21:37:18,361 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 597 transitions, 9896 flow [2022-07-22 21:37:18,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 86.70491803278688) internal successors, (5289), 61 states have internal predecessors, (5289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:18,361 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:18,361 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:18,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 21:37:18,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:37:18,567 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:18,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:18,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1230885854, now seen corresponding path program 8 times [2022-07-22 21:37:18,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:18,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097523069] [2022-07-22 21:37:18,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:18,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:19,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:19,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097523069] [2022-07-22 21:37:19,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097523069] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:19,182 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:19,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 21:37:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573714568] [2022-07-22 21:37:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:37:19,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:37:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:37:19,184 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-07-22 21:37:19,185 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 597 transitions, 9896 flow. Second operand has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:19,185 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:19,185 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-07-22 21:37:19,185 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:21,885 INFO L129 PetriNetUnfolder]: 4573/8856 cut-off events. [2022-07-22 21:37:21,886 INFO L130 PetriNetUnfolder]: For 75078/75097 co-relation queries the response was YES. [2022-07-22 21:37:21,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 44739 conditions, 8856 events. 4573/8856 cut-off events. For 75078/75097 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 72998 event pairs, 1188 based on Foata normal form. 20/8797 useless extension candidates. Maximal degree in co-relation 44638. Up to 4799 conditions per place. [2022-07-22 21:37:21,988 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 362 selfloop transitions, 204 changer transitions 15/668 dead transitions. [2022-07-22 21:37:21,988 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 668 transitions, 11568 flow [2022-07-22 21:37:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 21:37:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-22 21:37:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2938 transitions. [2022-07-22 21:37:21,991 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5822433610780816 [2022-07-22 21:37:21,991 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2938 transitions. [2022-07-22 21:37:21,991 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2938 transitions. [2022-07-22 21:37:21,991 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:21,991 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2938 transitions. [2022-07-22 21:37:21,994 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 101.3103448275862) internal successors, (2938), 29 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:21,996 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:21,997 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:21,997 INFO L186 Difference]: Start difference. First operand has 465 places, 597 transitions, 9896 flow. Second operand 29 states and 2938 transitions. [2022-07-22 21:37:21,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 668 transitions, 11568 flow [2022-07-22 21:37:22,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 668 transitions, 10490 flow, removed 105 selfloop flow, removed 37 redundant places. [2022-07-22 21:37:22,560 INFO L242 Difference]: Finished difference. Result has 458 places, 592 transitions, 9169 flow [2022-07-22 21:37:22,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=8830, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=9169, PETRI_PLACES=458, PETRI_TRANSITIONS=592} [2022-07-22 21:37:22,561 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 303 predicate places. [2022-07-22 21:37:22,561 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 592 transitions, 9169 flow [2022-07-22 21:37:22,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 97.71428571428571) internal successors, (2052), 21 states have internal predecessors, (2052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:22,561 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:22,561 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:22,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-07-22 21:37:22,561 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:22,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:22,562 INFO L85 PathProgramCache]: Analyzing trace with hash -2117038966, now seen corresponding path program 9 times [2022-07-22 21:37:22,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:22,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879353267] [2022-07-22 21:37:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:22,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:23,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:23,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:23,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879353267] [2022-07-22 21:37:23,015 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879353267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:23,015 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:23,015 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 21:37:23,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714405998] [2022-07-22 21:37:23,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:23,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:37:23,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:23,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:37:23,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:37:23,017 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2022-07-22 21:37:23,018 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 592 transitions, 9169 flow. Second operand has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:23,018 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:23,018 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2022-07-22 21:37:23,018 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:25,568 INFO L129 PetriNetUnfolder]: 4525/8766 cut-off events. [2022-07-22 21:37:25,569 INFO L130 PetriNetUnfolder]: For 64568/64587 co-relation queries the response was YES. [2022-07-22 21:37:25,643 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41311 conditions, 8766 events. 4525/8766 cut-off events. For 64568/64587 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 72051 event pairs, 1248 based on Foata normal form. 20/8709 useless extension candidates. Maximal degree in co-relation 41211. Up to 4796 conditions per place. [2022-07-22 21:37:25,739 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 348 selfloop transitions, 205 changer transitions 9/652 dead transitions. [2022-07-22 21:37:25,739 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 652 transitions, 10668 flow [2022-07-22 21:37:25,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 21:37:25,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-22 21:37:25,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2845 transitions. [2022-07-22 21:37:25,742 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6055768412090251 [2022-07-22 21:37:25,742 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2845 transitions. [2022-07-22 21:37:25,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2845 transitions. [2022-07-22 21:37:25,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:25,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2845 transitions. [2022-07-22 21:37:25,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 105.37037037037037) internal successors, (2845), 27 states have internal predecessors, (2845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:25,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:25,749 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:25,749 INFO L186 Difference]: Start difference. First operand has 458 places, 592 transitions, 9169 flow. Second operand 27 states and 2845 transitions. [2022-07-22 21:37:25,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 652 transitions, 10668 flow [2022-07-22 21:37:26,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 652 transitions, 10428 flow, removed 9 selfloop flow, removed 26 redundant places. [2022-07-22 21:37:26,079 INFO L242 Difference]: Finished difference. Result has 456 places, 587 transitions, 9257 flow [2022-07-22 21:37:26,081 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=8909, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=205, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=9257, PETRI_PLACES=456, PETRI_TRANSITIONS=587} [2022-07-22 21:37:26,081 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 301 predicate places. [2022-07-22 21:37:26,081 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 587 transitions, 9257 flow [2022-07-22 21:37:26,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 101.57142857142857) internal successors, (2133), 21 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:26,081 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:26,081 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:26,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-07-22 21:37:26,082 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:26,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:26,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1845315764, now seen corresponding path program 10 times [2022-07-22 21:37:26,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:26,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039695656] [2022-07-22 21:37:26,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:26,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:26,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:26,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039695656] [2022-07-22 21:37:26,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039695656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 21:37:26,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749558620] [2022-07-22 21:37:26,577 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 21:37:26,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 21:37:26,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 21:37:26,578 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 21:37:26,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 21:37:26,656 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 21:37:26,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 21:37:26,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 70 conjunts are in the unsatisfiable core [2022-07-22 21:37:26,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 21:37:26,681 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:37:26,712 INFO L356 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2022-07-22 21:37:26,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2022-07-22 21:37:26,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:37:26,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:37:26,920 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-22 21:37:26,921 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 25 [2022-07-22 21:37:27,109 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:37:27,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:37:27,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:37:27,563 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:37:27,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:37:27,571 INFO L356 Elim1Store]: treesize reduction 13, result has 23.5 percent of original size [2022-07-22 21:37:27,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 17 [2022-07-22 21:37:27,741 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-22 21:37:27,968 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-22 21:37:28,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:37:28,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 21:37:28,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 26 [2022-07-22 21:37:28,215 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2022-07-22 21:37:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 21:37:28,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 21:37:28,733 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_ArrVal_515 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (v_ArrVal_513 Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ (* 4 |c_ULTIMATE.start_create_fresh_int_array_~i~0#1|) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|) v_ArrVal_513)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_514))) (or (not (let ((.cse0 (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_515)) (.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse1 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|))))) (let ((.cse3 (* c_~i_AB~0 4))) (= (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3)) (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3))))))) is different from false [2022-07-22 21:37:28,762 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_ArrVal_515 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (v_ArrVal_513 Int)) (let ((.cse0 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| v_ArrVal_513)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_514))) (or (let ((.cse1 (* c_~i_AB~0 4))) (= (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1)) (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse1)))) (not (let ((.cse2 (store .cse0 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_515)) (.cse3 (* c_~i_BA~0 4))) (= (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_~arr~0#1.base|) (+ .cse3 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3)))))))) is different from false [2022-07-22 21:37:28,780 WARN L833 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| Int) (v_ArrVal_515 (Array Int Int)) (v_ArrVal_514 (Array Int Int)) (v_ArrVal_513 Int)) (let ((.cse2 (store (store |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base|) |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| v_ArrVal_513)) |c_ULTIMATE.start_main_~#t1~0#1.base| v_ArrVal_514))) (or (not (let ((.cse0 (store .cse2 |c_ULTIMATE.start_main_~#t2~0#1.base| v_ArrVal_515)) (.cse1 (* c_~i_BA~0 4))) (= (select (select .cse0 |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base|) (+ .cse1 |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset|)) (select (select .cse0 c_~A~0.base) (+ c_~A~0.offset .cse1))))) (let ((.cse3 (* c_~i_AB~0 4))) (= (select (select .cse2 |c_ULTIMATE.start_create_fresh_int_array_#t~malloc17#1.base|) (+ |ULTIMATE.start_create_fresh_int_array_~arr~0#1.offset| .cse3)) (select (select .cse2 c_~A~0.base) (+ c_~A~0.offset .cse3))))))) is different from false [2022-07-22 21:37:29,367 INFO L356 Elim1Store]: treesize reduction 23, result has 60.3 percent of original size [2022-07-22 21:37:29,368 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 186 treesize of output 92 [2022-07-22 21:37:29,450 INFO L356 Elim1Store]: treesize reduction 47, result has 73.7 percent of original size [2022-07-22 21:37:29,450 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 1842 treesize of output 1677 [2022-07-22 21:37:29,492 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:37:29,492 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 1528 treesize of output 1408 [2022-07-22 21:37:29,525 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 21:37:29,526 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 1270 treesize of output 903 [2022-07-22 21:37:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 1 times theorem prover too weak. 0 trivial. 1 not checked. [2022-07-22 21:37:31,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749558620] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 21:37:31,051 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 21:37:31,051 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 26] total 65 [2022-07-22 21:37:31,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364727012] [2022-07-22 21:37:31,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 21:37:31,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-07-22 21:37:31,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:31,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-07-22 21:37:31,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=3350, Unknown=65, NotChecked=366, Total=4160 [2022-07-22 21:37:31,055 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2022-07-22 21:37:31,057 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 587 transitions, 9257 flow. Second operand has 65 states, 65 states have (on average 86.50769230769231) internal successors, (5623), 65 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:31,057 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:31,057 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2022-07-22 21:37:31,057 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:36,973 INFO L129 PetriNetUnfolder]: 4722/9081 cut-off events. [2022-07-22 21:37:36,973 INFO L130 PetriNetUnfolder]: For 70039/70058 co-relation queries the response was YES. [2022-07-22 21:37:37,037 INFO L84 FinitePrefix]: Finished finitePrefix Result has 42970 conditions, 9081 events. 4722/9081 cut-off events. For 70039/70058 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 74673 event pairs, 1098 based on Foata normal form. 36/9042 useless extension candidates. Maximal degree in co-relation 42872. Up to 4503 conditions per place. [2022-07-22 21:37:37,074 INFO L132 encePairwiseOnDemand]: 134/174 looper letters, 411 selfloop transitions, 274 changer transitions 1/759 dead transitions. [2022-07-22 21:37:37,074 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 759 transitions, 12046 flow [2022-07-22 21:37:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-22 21:37:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2022-07-22 21:37:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 3458 transitions. [2022-07-22 21:37:37,077 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5229885057471264 [2022-07-22 21:37:37,077 INFO L72 ComplementDD]: Start complementDD. Operand 38 states and 3458 transitions. [2022-07-22 21:37:37,077 INFO L73 IsDeterministic]: Start isDeterministic. Operand 38 states and 3458 transitions. [2022-07-22 21:37:37,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:37,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 38 states and 3458 transitions. [2022-07-22 21:37:37,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 39 states, 38 states have (on average 91.0) internal successors, (3458), 38 states have internal predecessors, (3458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:37,085 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 39 states, 39 states have (on average 174.0) internal successors, (6786), 39 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:37,085 INFO L81 ComplementDD]: Finished complementDD. Result has 39 states, 39 states have (on average 174.0) internal successors, (6786), 39 states have internal predecessors, (6786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:37,085 INFO L186 Difference]: Start difference. First operand has 456 places, 587 transitions, 9257 flow. Second operand 38 states and 3458 transitions. [2022-07-22 21:37:37,085 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 759 transitions, 12046 flow [2022-07-22 21:37:37,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 462 places, 759 transitions, 11482 flow, removed 5 selfloop flow, removed 28 redundant places. [2022-07-22 21:37:37,431 INFO L242 Difference]: Finished difference. Result has 470 places, 625 transitions, 9998 flow [2022-07-22 21:37:37,431 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=8714, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=587, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=237, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=9998, PETRI_PLACES=470, PETRI_TRANSITIONS=625} [2022-07-22 21:37:37,432 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 315 predicate places. [2022-07-22 21:37:37,432 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 625 transitions, 9998 flow [2022-07-22 21:37:37,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 86.50769230769231) internal successors, (5623), 65 states have internal predecessors, (5623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:37,433 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:37,433 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:37,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 21:37:37,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-07-22 21:37:37,634 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:37,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:37,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1773275984, now seen corresponding path program 10 times [2022-07-22 21:37:37,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:37,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567493409] [2022-07-22 21:37:37,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:37,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:37,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:38,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:38,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:38,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567493409] [2022-07-22 21:37:38,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567493409] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:38,032 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:38,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:37:38,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586804064] [2022-07-22 21:37:38,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:38,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:37:38,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:38,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:37:38,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:37:38,034 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-22 21:37:38,035 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 625 transitions, 9998 flow. Second operand has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:38,035 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:38,035 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-22 21:37:38,035 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:40,834 INFO L129 PetriNetUnfolder]: 4720/9119 cut-off events. [2022-07-22 21:37:40,834 INFO L130 PetriNetUnfolder]: For 78293/78312 co-relation queries the response was YES. [2022-07-22 21:37:40,929 INFO L84 FinitePrefix]: Finished finitePrefix Result has 46144 conditions, 9119 events. 4720/9119 cut-off events. For 78293/78312 co-relation queries the response was YES. Maximal size of possible extension queue 529. Compared 75270 event pairs, 1215 based on Foata normal form. 14/9054 useless extension candidates. Maximal degree in co-relation 46041. Up to 4993 conditions per place. [2022-07-22 21:37:41,044 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 373 selfloop transitions, 213 changer transitions 9/683 dead transitions. [2022-07-22 21:37:41,045 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 683 transitions, 11640 flow [2022-07-22 21:37:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 21:37:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-22 21:37:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2963 transitions. [2022-07-22 21:37:41,052 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5871977804201347 [2022-07-22 21:37:41,052 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2963 transitions. [2022-07-22 21:37:41,052 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2963 transitions. [2022-07-22 21:37:41,053 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:41,053 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2963 transitions. [2022-07-22 21:37:41,055 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.17241379310344) internal successors, (2963), 29 states have internal predecessors, (2963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:41,058 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:41,058 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:41,058 INFO L186 Difference]: Start difference. First operand has 470 places, 625 transitions, 9998 flow. Second operand 29 states and 2963 transitions. [2022-07-22 21:37:41,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 683 transitions, 11640 flow [2022-07-22 21:37:41,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 683 transitions, 11240 flow, removed 32 selfloop flow, removed 29 redundant places. [2022-07-22 21:37:41,478 INFO L242 Difference]: Finished difference. Result has 474 places, 624 transitions, 10139 flow [2022-07-22 21:37:41,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=9613, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=10139, PETRI_PLACES=474, PETRI_TRANSITIONS=624} [2022-07-22 21:37:41,483 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 319 predicate places. [2022-07-22 21:37:41,484 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 624 transitions, 10139 flow [2022-07-22 21:37:41,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:41,484 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:41,484 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:41,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-07-22 21:37:41,485 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:41,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:41,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1442239000, now seen corresponding path program 11 times [2022-07-22 21:37:41,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:41,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606949301] [2022-07-22 21:37:41,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:41,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:41,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:41,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:41,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606949301] [2022-07-22 21:37:41,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606949301] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:41,924 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:41,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 21:37:41,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319706804] [2022-07-22 21:37:41,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:41,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:37:41,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:41,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:37:41,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:37:41,926 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-22 21:37:41,927 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 624 transitions, 10139 flow. Second operand has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:41,927 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:41,927 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-22 21:37:41,927 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:44,978 INFO L129 PetriNetUnfolder]: 5170/9923 cut-off events. [2022-07-22 21:37:44,978 INFO L130 PetriNetUnfolder]: For 90183/90202 co-relation queries the response was YES. [2022-07-22 21:37:45,075 INFO L84 FinitePrefix]: Finished finitePrefix Result has 50063 conditions, 9923 events. 5170/9923 cut-off events. For 90183/90202 co-relation queries the response was YES. Maximal size of possible extension queue 599. Compared 83191 event pairs, 1164 based on Foata normal form. 76/9919 useless extension candidates. Maximal degree in co-relation 49955. Up to 4630 conditions per place. [2022-07-22 21:37:45,117 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 392 selfloop transitions, 299 changer transitions 0/779 dead transitions. [2022-07-22 21:37:45,117 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 779 transitions, 12976 flow [2022-07-22 21:37:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-22 21:37:45,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-07-22 21:37:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 3420 transitions. [2022-07-22 21:37:45,119 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5956112852664577 [2022-07-22 21:37:45,119 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 3420 transitions. [2022-07-22 21:37:45,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 3420 transitions. [2022-07-22 21:37:45,120 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:45,120 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 3420 transitions. [2022-07-22 21:37:45,122 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 103.63636363636364) internal successors, (3420), 33 states have internal predecessors, (3420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:45,125 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:45,125 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 174.0) internal successors, (5916), 34 states have internal predecessors, (5916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:45,125 INFO L186 Difference]: Start difference. First operand has 474 places, 624 transitions, 10139 flow. Second operand 33 states and 3420 transitions. [2022-07-22 21:37:45,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 779 transitions, 12976 flow [2022-07-22 21:37:45,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 779 transitions, 12484 flow, removed 32 selfloop flow, removed 29 redundant places. [2022-07-22 21:37:45,680 INFO L242 Difference]: Finished difference. Result has 483 places, 659 transitions, 11159 flow [2022-07-22 21:37:45,681 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=9695, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=265, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=11159, PETRI_PLACES=483, PETRI_TRANSITIONS=659} [2022-07-22 21:37:45,682 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 328 predicate places. [2022-07-22 21:37:45,682 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 659 transitions, 11159 flow [2022-07-22 21:37:45,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:45,682 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:45,683 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:45,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 21:37:45,683 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash -356820308, now seen corresponding path program 12 times [2022-07-22 21:37:45,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:45,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458563458] [2022-07-22 21:37:45,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:45,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:45,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:46,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:46,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:46,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458563458] [2022-07-22 21:37:46,088 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458563458] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:46,088 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:46,088 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:37:46,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466686655] [2022-07-22 21:37:46,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:46,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:37:46,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:46,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:37:46,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:37:46,090 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-22 21:37:46,091 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 659 transitions, 11159 flow. Second operand has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:46,091 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:46,091 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-22 21:37:46,091 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:49,076 INFO L129 PetriNetUnfolder]: 5234/10061 cut-off events. [2022-07-22 21:37:49,076 INFO L130 PetriNetUnfolder]: For 99200/99219 co-relation queries the response was YES. [2022-07-22 21:37:49,168 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52583 conditions, 10061 events. 5234/10061 cut-off events. For 99200/99219 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 84525 event pairs, 1274 based on Foata normal form. 24/9998 useless extension candidates. Maximal degree in co-relation 52474. Up to 5642 conditions per place. [2022-07-22 21:37:49,206 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 403 selfloop transitions, 248 changer transitions 5/744 dead transitions. [2022-07-22 21:37:49,206 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 744 transitions, 13645 flow [2022-07-22 21:37:49,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 21:37:49,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2022-07-22 21:37:49,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 2773 transitions. [2022-07-22 21:37:49,208 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5902511707109408 [2022-07-22 21:37:49,209 INFO L72 ComplementDD]: Start complementDD. Operand 27 states and 2773 transitions. [2022-07-22 21:37:49,209 INFO L73 IsDeterministic]: Start isDeterministic. Operand 27 states and 2773 transitions. [2022-07-22 21:37:49,209 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:49,209 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 27 states and 2773 transitions. [2022-07-22 21:37:49,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 28 states, 27 states have (on average 102.70370370370371) internal successors, (2773), 27 states have internal predecessors, (2773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:49,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:49,213 INFO L81 ComplementDD]: Finished complementDD. Result has 28 states, 28 states have (on average 174.0) internal successors, (4872), 28 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:49,213 INFO L186 Difference]: Start difference. First operand has 483 places, 659 transitions, 11159 flow. Second operand 27 states and 2773 transitions. [2022-07-22 21:37:49,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 744 transitions, 13645 flow [2022-07-22 21:37:49,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 744 transitions, 13348 flow, removed 25 selfloop flow, removed 21 redundant places. [2022-07-22 21:37:49,768 INFO L242 Difference]: Finished difference. Result has 492 places, 687 transitions, 12225 flow [2022-07-22 21:37:49,769 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=10884, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=12225, PETRI_PLACES=492, PETRI_TRANSITIONS=687} [2022-07-22 21:37:49,769 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 337 predicate places. [2022-07-22 21:37:49,769 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 687 transitions, 12225 flow [2022-07-22 21:37:49,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:49,769 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:49,770 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:49,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 21:37:49,770 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:49,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:49,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1004739636, now seen corresponding path program 13 times [2022-07-22 21:37:49,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:49,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618367970] [2022-07-22 21:37:49,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:49,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:49,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:50,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:50,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618367970] [2022-07-22 21:37:50,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618367970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:50,206 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:50,206 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 21:37:50,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871421089] [2022-07-22 21:37:50,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:50,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:37:50,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:50,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:37:50,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:37:50,208 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-22 21:37:50,209 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 687 transitions, 12225 flow. Second operand has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:50,209 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:50,209 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-22 21:37:50,209 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:53,359 INFO L129 PetriNetUnfolder]: 5212/10019 cut-off events. [2022-07-22 21:37:53,359 INFO L130 PetriNetUnfolder]: For 102665/102684 co-relation queries the response was YES. [2022-07-22 21:37:53,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52165 conditions, 10019 events. 5212/10019 cut-off events. For 102665/102684 co-relation queries the response was YES. Maximal size of possible extension queue 600. Compared 84192 event pairs, 1285 based on Foata normal form. 24/9956 useless extension candidates. Maximal degree in co-relation 52053. Up to 5642 conditions per place. [2022-07-22 21:37:53,511 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 402 selfloop transitions, 242 changer transitions 5/737 dead transitions. [2022-07-22 21:37:53,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 737 transitions, 13852 flow [2022-07-22 21:37:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 21:37:53,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2022-07-22 21:37:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 2675 transitions. [2022-07-22 21:37:53,513 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5912908930150309 [2022-07-22 21:37:53,513 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 2675 transitions. [2022-07-22 21:37:53,513 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 2675 transitions. [2022-07-22 21:37:53,514 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:53,514 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 2675 transitions. [2022-07-22 21:37:53,516 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 102.88461538461539) internal successors, (2675), 26 states have internal predecessors, (2675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:53,518 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:53,518 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 174.0) internal successors, (4698), 27 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:53,518 INFO L186 Difference]: Start difference. First operand has 492 places, 687 transitions, 12225 flow. Second operand 26 states and 2675 transitions. [2022-07-22 21:37:53,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 737 transitions, 13852 flow [2022-07-22 21:37:54,140 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 737 transitions, 13501 flow, removed 6 selfloop flow, removed 22 redundant places. [2022-07-22 21:37:54,152 INFO L242 Difference]: Finished difference. Result has 497 places, 681 transitions, 12300 flow [2022-07-22 21:37:54,153 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=11797, PETRI_DIFFERENCE_MINUEND_PLACES=470, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=240, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12300, PETRI_PLACES=497, PETRI_TRANSITIONS=681} [2022-07-22 21:37:54,154 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 342 predicate places. [2022-07-22 21:37:54,154 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 681 transitions, 12300 flow [2022-07-22 21:37:54,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:54,154 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:54,154 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:54,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 21:37:54,155 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:54,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:54,155 INFO L85 PathProgramCache]: Analyzing trace with hash -105582696, now seen corresponding path program 14 times [2022-07-22 21:37:54,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:54,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773440094] [2022-07-22 21:37:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:54,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:54,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:54,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773440094] [2022-07-22 21:37:54,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773440094] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:54,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:54,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 21:37:54,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948471756] [2022-07-22 21:37:54,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:54,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:37:54,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:54,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:37:54,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:37:54,545 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-22 21:37:54,547 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 681 transitions, 12300 flow. Second operand has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:54,547 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:54,547 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-22 21:37:54,547 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:37:57,814 INFO L129 PetriNetUnfolder]: 5362/10277 cut-off events. [2022-07-22 21:37:57,815 INFO L130 PetriNetUnfolder]: For 109996/110015 co-relation queries the response was YES. [2022-07-22 21:37:57,907 INFO L84 FinitePrefix]: Finished finitePrefix Result has 53522 conditions, 10277 events. 5362/10277 cut-off events. For 109996/110015 co-relation queries the response was YES. Maximal size of possible extension queue 633. Compared 86641 event pairs, 1286 based on Foata normal form. 80/10265 useless extension candidates. Maximal degree in co-relation 53410. Up to 5404 conditions per place. [2022-07-22 21:37:57,947 INFO L132 encePairwiseOnDemand]: 141/174 looper letters, 364 selfloop transitions, 307 changer transitions 0/759 dead transitions. [2022-07-22 21:37:57,947 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 759 transitions, 14106 flow [2022-07-22 21:37:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 21:37:57,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-22 21:37:57,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2992 transitions. [2022-07-22 21:37:57,949 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5929449068569164 [2022-07-22 21:37:57,949 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2992 transitions. [2022-07-22 21:37:57,949 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2992 transitions. [2022-07-22 21:37:57,949 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:37:57,949 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2992 transitions. [2022-07-22 21:37:57,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 103.17241379310344) internal successors, (2992), 29 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:57,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:57,954 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:57,954 INFO L186 Difference]: Start difference. First operand has 497 places, 681 transitions, 12300 flow. Second operand 29 states and 2992 transitions. [2022-07-22 21:37:57,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 759 transitions, 14106 flow [2022-07-22 21:37:58,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 759 transitions, 13515 flow, removed 6 selfloop flow, removed 26 redundant places. [2022-07-22 21:37:58,566 INFO L242 Difference]: Finished difference. Result has 505 places, 687 transitions, 12670 flow [2022-07-22 21:37:58,567 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=11328, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=287, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12670, PETRI_PLACES=505, PETRI_TRANSITIONS=687} [2022-07-22 21:37:58,568 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 350 predicate places. [2022-07-22 21:37:58,568 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 687 transitions, 12670 flow [2022-07-22 21:37:58,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:58,568 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:37:58,568 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:37:58,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-07-22 21:37:58,569 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:37:58,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:37:58,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1438483448, now seen corresponding path program 15 times [2022-07-22 21:37:58,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:37:58,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693808277] [2022-07-22 21:37:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:37:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:37:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:37:59,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:37:59,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:37:59,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693808277] [2022-07-22 21:37:59,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693808277] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:37:59,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:37:59,076 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-07-22 21:37:59,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649894644] [2022-07-22 21:37:59,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:37:59,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 21:37:59,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:37:59,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 21:37:59,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2022-07-22 21:37:59,078 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-22 21:37:59,079 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 687 transitions, 12670 flow. Second operand has 22 states, 22 states have (on average 98.54545454545455) internal successors, (2168), 22 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:37:59,079 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:37:59,079 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-22 21:37:59,079 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:02,217 INFO L129 PetriNetUnfolder]: 5081/9718 cut-off events. [2022-07-22 21:38:02,217 INFO L130 PetriNetUnfolder]: For 106078/106097 co-relation queries the response was YES. [2022-07-22 21:38:02,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 51633 conditions, 9718 events. 5081/9718 cut-off events. For 106078/106097 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 81104 event pairs, 1293 based on Foata normal form. 80/9702 useless extension candidates. Maximal degree in co-relation 51518. Up to 5087 conditions per place. [2022-07-22 21:38:02,358 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 350 selfloop transitions, 303 changer transitions 0/741 dead transitions. [2022-07-22 21:38:02,358 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 741 transitions, 13916 flow [2022-07-22 21:38:02,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 21:38:02,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-22 21:38:02,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2888 transitions. [2022-07-22 21:38:02,360 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5927750410509032 [2022-07-22 21:38:02,360 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2888 transitions. [2022-07-22 21:38:02,360 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2888 transitions. [2022-07-22 21:38:02,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:02,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2888 transitions. [2022-07-22 21:38:02,362 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 103.14285714285714) internal successors, (2888), 28 states have internal predecessors, (2888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:02,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:02,365 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:02,365 INFO L186 Difference]: Start difference. First operand has 505 places, 687 transitions, 12670 flow. Second operand 28 states and 2888 transitions. [2022-07-22 21:38:02,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 741 transitions, 13916 flow [2022-07-22 21:38:02,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 741 transitions, 13475 flow, removed 8 selfloop flow, removed 28 redundant places. [2022-07-22 21:38:02,906 INFO L242 Difference]: Finished difference. Result has 502 places, 670 transitions, 12462 flow [2022-07-22 21:38:02,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=11444, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=291, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12462, PETRI_PLACES=502, PETRI_TRANSITIONS=670} [2022-07-22 21:38:02,907 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 347 predicate places. [2022-07-22 21:38:02,907 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 670 transitions, 12462 flow [2022-07-22 21:38:02,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.54545454545455) internal successors, (2168), 22 states have internal predecessors, (2168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:02,908 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:02,908 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:38:02,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-07-22 21:38:02,908 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:02,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:02,909 INFO L85 PathProgramCache]: Analyzing trace with hash 139634646, now seen corresponding path program 11 times [2022-07-22 21:38:02,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:02,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938053614] [2022-07-22 21:38:02,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:02,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:02,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:03,344 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:38:03,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:03,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938053614] [2022-07-22 21:38:03,345 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938053614] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:03,345 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:03,345 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-07-22 21:38:03,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347239552] [2022-07-22 21:38:03,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:03,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 21:38:03,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:03,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 21:38:03,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2022-07-22 21:38:03,347 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-22 21:38:03,348 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 670 transitions, 12462 flow. Second operand has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:03,348 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:03,348 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-22 21:38:03,348 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:06,601 INFO L129 PetriNetUnfolder]: 5093/9729 cut-off events. [2022-07-22 21:38:06,601 INFO L130 PetriNetUnfolder]: For 110217/110236 co-relation queries the response was YES. [2022-07-22 21:38:06,700 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52436 conditions, 9729 events. 5093/9729 cut-off events. For 110217/110236 co-relation queries the response was YES. Maximal size of possible extension queue 604. Compared 80975 event pairs, 1331 based on Foata normal form. 14/9643 useless extension candidates. Maximal degree in co-relation 52322. Up to 5601 conditions per place. [2022-07-22 21:38:06,738 INFO L132 encePairwiseOnDemand]: 143/174 looper letters, 365 selfloop transitions, 276 changer transitions 2/731 dead transitions. [2022-07-22 21:38:06,738 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 530 places, 731 transitions, 14200 flow [2022-07-22 21:38:06,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 21:38:06,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2022-07-22 21:38:06,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 2973 transitions. [2022-07-22 21:38:06,740 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.5891795481569561 [2022-07-22 21:38:06,740 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 2973 transitions. [2022-07-22 21:38:06,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 2973 transitions. [2022-07-22 21:38:06,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:06,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 2973 transitions. [2022-07-22 21:38:06,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 102.51724137931035) internal successors, (2973), 29 states have internal predecessors, (2973), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:06,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:06,745 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 174.0) internal successors, (5220), 30 states have internal predecessors, (5220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:06,745 INFO L186 Difference]: Start difference. First operand has 502 places, 670 transitions, 12462 flow. Second operand 29 states and 2973 transitions. [2022-07-22 21:38:06,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 530 places, 731 transitions, 14200 flow [2022-07-22 21:38:07,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 731 transitions, 13838 flow, removed 6 selfloop flow, removed 23 redundant places. [2022-07-22 21:38:07,330 INFO L242 Difference]: Finished difference. Result has 510 places, 675 transitions, 12864 flow [2022-07-22 21:38:07,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12106, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=271, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=12864, PETRI_PLACES=510, PETRI_TRANSITIONS=675} [2022-07-22 21:38:07,332 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 355 predicate places. [2022-07-22 21:38:07,332 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 675 transitions, 12864 flow [2022-07-22 21:38:07,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 98.66666666666667) internal successors, (2072), 21 states have internal predecessors, (2072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:07,332 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:07,332 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:38:07,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-07-22 21:38:07,333 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:07,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:07,333 INFO L85 PathProgramCache]: Analyzing trace with hash -155629712, now seen corresponding path program 12 times [2022-07-22 21:38:07,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:07,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093572208] [2022-07-22 21:38:07,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:07,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:07,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:38:07,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:07,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093572208] [2022-07-22 21:38:07,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093572208] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:07,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:07,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:38:07,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336456424] [2022-07-22 21:38:07,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:07,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:38:07,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:07,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:38:07,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:38:07,728 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 174 [2022-07-22 21:38:07,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 675 transitions, 12864 flow. Second operand has 20 states, 20 states have (on average 101.7) internal successors, (2034), 20 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:07,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:07,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 174 [2022-07-22 21:38:07,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-22 21:38:10,693 INFO L129 PetriNetUnfolder]: 5101/9783 cut-off events. [2022-07-22 21:38:10,694 INFO L130 PetriNetUnfolder]: For 114891/114910 co-relation queries the response was YES. [2022-07-22 21:38:10,832 INFO L84 FinitePrefix]: Finished finitePrefix Result has 52908 conditions, 9783 events. 5101/9783 cut-off events. For 114891/114910 co-relation queries the response was YES. Maximal size of possible extension queue 605. Compared 82055 event pairs, 1330 based on Foata normal form. 16/9701 useless extension candidates. Maximal degree in co-relation 52794. Up to 5599 conditions per place. [2022-07-22 21:38:10,869 INFO L132 encePairwiseOnDemand]: 142/174 looper letters, 405 selfloop transitions, 223 changer transitions 15/733 dead transitions. [2022-07-22 21:38:10,869 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 733 transitions, 14580 flow [2022-07-22 21:38:10,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 21:38:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2022-07-22 21:38:10,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 2944 transitions. [2022-07-22 21:38:10,871 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.6042692939244664 [2022-07-22 21:38:10,871 INFO L72 ComplementDD]: Start complementDD. Operand 28 states and 2944 transitions. [2022-07-22 21:38:10,871 INFO L73 IsDeterministic]: Start isDeterministic. Operand 28 states and 2944 transitions. [2022-07-22 21:38:10,871 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-22 21:38:10,871 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 28 states and 2944 transitions. [2022-07-22 21:38:10,873 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 29 states, 28 states have (on average 105.14285714285714) internal successors, (2944), 28 states have internal predecessors, (2944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:10,876 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:10,876 INFO L81 ComplementDD]: Finished complementDD. Result has 29 states, 29 states have (on average 174.0) internal successors, (5046), 29 states have internal predecessors, (5046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:10,876 INFO L186 Difference]: Start difference. First operand has 510 places, 675 transitions, 12864 flow. Second operand 28 states and 2944 transitions. [2022-07-22 21:38:10,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 733 transitions, 14580 flow [2022-07-22 21:38:11,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 733 transitions, 14276 flow, removed 2 selfloop flow, removed 20 redundant places. [2022-07-22 21:38:11,482 INFO L242 Difference]: Finished difference. Result has 519 places, 670 transitions, 12921 flow [2022-07-22 21:38:11,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=12566, PETRI_DIFFERENCE_MINUEND_PLACES=490, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=222, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=12921, PETRI_PLACES=519, PETRI_TRANSITIONS=670} [2022-07-22 21:38:11,483 INFO L279 CegarLoopForPetriNet]: 155 programPoint places, 364 predicate places. [2022-07-22 21:38:11,483 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 670 transitions, 12921 flow [2022-07-22 21:38:11,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 101.7) internal successors, (2034), 20 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:11,483 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-22 21:38:11,484 INFO L200 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 21:38:11,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-07-22 21:38:11,484 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-22 21:38:11,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 21:38:11,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1021973906, now seen corresponding path program 13 times [2022-07-22 21:38:11,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 21:38:11,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109158950] [2022-07-22 21:38:11,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 21:38:11,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 21:38:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 21:38:11,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-22 21:38:11,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 21:38:11,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109158950] [2022-07-22 21:38:11,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109158950] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 21:38:11,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 21:38:11,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-07-22 21:38:11,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867198122] [2022-07-22 21:38:11,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 21:38:11,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 21:38:11,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 21:38:11,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 21:38:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2022-07-22 21:38:11,866 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 174 [2022-07-22 21:38:11,866 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 670 transitions, 12921 flow. Second operand has 20 states, 20 states have (on average 98.8) internal successors, (1976), 20 states have internal predecessors, (1976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 21:38:11,866 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-22 21:38:11,866 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 174 [2022-07-22 21:38:11,866 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand