./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/unreach-call.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --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 1ecd7c8e693c00e4ad1aa87421fd475cfc129d605eef5f310568fee0c97eadf4 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 14:42:45,971 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 14:42:46,042 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-10-14 14:42:46,049 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 14:42:46,050 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 14:42:46,081 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 14:42:46,081 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 14:42:46,082 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 14:42:46,082 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 14:42:46,083 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 14:42:46,083 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 14:42:46,083 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 14:42:46,084 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 14:42:46,084 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 14:42:46,085 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 14:42:46,085 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 14:42:46,085 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-10-14 14:42:46,086 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 14:42:46,086 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 14:42:46,086 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 14:42:46,087 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 14:42:46,087 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-10-14 14:42:46,088 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 14:42:46,088 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-10-14 14:42:46,088 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 14:42:46,088 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 14:42:46,089 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-10-14 14:42:46,089 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 14:42:46,089 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 14:42:46,089 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 14:42:46,090 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 14:42:46,090 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 14:42:46,090 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:42:46,091 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 14:42:46,091 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 14:42:46,091 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-10-14 14:42:46,092 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 14:42:46,092 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 14:42:46,092 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 14:42:46,093 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 14:42:46,093 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 14:42:46,093 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 14:42:46,094 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1ecd7c8e693c00e4ad1aa87421fd475cfc129d605eef5f310568fee0c97eadf4 [2024-10-14 14:42:46,346 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 14:42:46,370 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 14:42:46,373 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 14:42:46,374 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 14:42:46,376 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 14:42:46,377 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c [2024-10-14 14:42:47,882 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 14:42:48,081 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 14:42:48,082 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c [2024-10-14 14:42:48,090 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bd1ae6a/d9e2378b28e2489bbfd90a08bf9777d3/FLAGcd7e5e1db [2024-10-14 14:42:48,104 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a7bd1ae6a/d9e2378b28e2489bbfd90a08bf9777d3 [2024-10-14 14:42:48,106 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 14:42:48,108 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 14:42:48,109 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 14:42:48,109 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 14:42:48,115 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 14:42:48,116 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,119 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c7aa22d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48, skipping insertion in model container [2024-10-14 14:42:48,119 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,146 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 14:42:48,429 WARN L248 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/popl20-prod-cons-eq.wvr.c[4419,4432] [2024-10-14 14:42:48,446 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:42:48,458 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 14:42:48,485 WARN L248 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/popl20-prod-cons-eq.wvr.c[4419,4432] [2024-10-14 14:42:48,490 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 14:42:48,510 INFO L204 MainTranslator]: Completed translation [2024-10-14 14:42:48,510 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48 WrapperNode [2024-10-14 14:42:48,511 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 14:42:48,512 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 14:42:48,513 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 14:42:48,513 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 14:42:48,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,536 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,588 INFO L138 Inliner]: procedures = 27, calls = 65, calls flagged for inlining = 26, calls inlined = 32, statements flattened = 397 [2024-10-14 14:42:48,588 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 14:42:48,589 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 14:42:48,589 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 14:42:48,589 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 14:42:48,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,602 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,615 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,658 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 3, 3, 16]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 6 writes are split as follows [0, 1, 1, 4]. [2024-10-14 14:42:48,658 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,658 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,679 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,689 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,696 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,699 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,707 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 14:42:48,712 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 14:42:48,712 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 14:42:48,712 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 14:42:48,713 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (1/1) ... [2024-10-14 14:42:48,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 14:42:48,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:42:48,756 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 14:42:48,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 14:42:48,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 14:42:48,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-14 14:42:48,817 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-10-14 14:42:48,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-10-14 14:42:48,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-10-14 14:42:48,818 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-14 14:42:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-14 14:42:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-14 14:42:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-14 14:42:48,819 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-14 14:42:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-14 14:42:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-14 14:42:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-14 14:42:48,820 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-14 14:42:48,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-10-14 14:42:48,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-10-14 14:42:48,822 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-10-14 14:42:48,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 14:42:48,822 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 14:42:48,822 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 14:42:48,823 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 14:42:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-14 14:42:48,823 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-14 14:42:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-14 14:42:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-14 14:42:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-14 14:42:48,823 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-14 14:42:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 14:42:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 14:42:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 14:42:48,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 14:42:48,825 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 14:42:48,827 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 14:42:49,011 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 14:42:49,013 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 14:42:49,609 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 14:42:49,610 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 14:42:50,094 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 14:42:50,095 INFO L314 CfgBuilder]: Removed 9 assume(true) statements. [2024-10-14 14:42:50,096 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:42:50 BoogieIcfgContainer [2024-10-14 14:42:50,096 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 14:42:50,098 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 14:42:50,098 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 14:42:50,103 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 14:42:50,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 02:42:48" (1/3) ... [2024-10-14 14:42:50,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac8fadb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:42:50, skipping insertion in model container [2024-10-14 14:42:50,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 02:42:48" (2/3) ... [2024-10-14 14:42:50,105 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac8fadb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 02:42:50, skipping insertion in model container [2024-10-14 14:42:50,105 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 02:42:50" (3/3) ... [2024-10-14 14:42:50,107 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons-eq.wvr.c [2024-10-14 14:42:50,127 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 14:42:50,128 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-10-14 14:42:50,128 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 14:42:50,189 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 14:42:50,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 43 transitions, 107 flow [2024-10-14 14:42:50,266 INFO L124 PetriNetUnfolderBase]: 9/40 cut-off events. [2024-10-14 14:42:50,266 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 14:42:50,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 40 events. 9/40 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 45 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 33. Up to 2 conditions per place. [2024-10-14 14:42:50,271 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 43 transitions, 107 flow [2024-10-14 14:42:50,275 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 39 transitions, 96 flow [2024-10-14 14:42:50,289 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 14:42:50,298 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@7b9bd14c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 14:42:50,299 INFO L334 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-10-14 14:42:50,322 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 14:42:50,323 INFO L124 PetriNetUnfolderBase]: 9/38 cut-off events. [2024-10-14 14:42:50,323 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 14:42:50,323 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:50,324 INFO L204 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] [2024-10-14 14:42:50,324 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:50,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:50,330 INFO L85 PathProgramCache]: Analyzing trace with hash -981209084, now seen corresponding path program 1 times [2024-10-14 14:42:50,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:50,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924512369] [2024-10-14 14:42:50,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:50,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:50,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:50,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:42:50,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:50,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924512369] [2024-10-14 14:42:50,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924512369] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:42:50,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:42:50,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:42:50,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597682506] [2024-10-14 14:42:50,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:50,819 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:42:50,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:50,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:42:50,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:42:50,861 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-10-14 14:42:50,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:50,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:50,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-10-14 14:42:50,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:51,152 INFO L124 PetriNetUnfolderBase]: 503/792 cut-off events. [2024-10-14 14:42:51,152 INFO L125 PetriNetUnfolderBase]: For 55/55 co-relation queries the response was YES. [2024-10-14 14:42:51,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1567 conditions, 792 events. 503/792 cut-off events. For 55/55 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3515 event pairs, 91 based on Foata normal form. 1/683 useless extension candidates. Maximal degree in co-relation 1400. Up to 493 conditions per place. [2024-10-14 14:42:51,164 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 41 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2024-10-14 14:42:51,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 53 transitions, 226 flow [2024-10-14 14:42:51,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:42:51,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:42:51,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-10-14 14:42:51,176 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-10-14 14:42:51,179 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 96 flow. Second operand 3 states and 79 transitions. [2024-10-14 14:42:51,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 53 transitions, 226 flow [2024-10-14 14:42:51,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 53 transitions, 206 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 14:42:51,189 INFO L231 Difference]: Finished difference. Result has 37 places, 41 transitions, 103 flow [2024-10-14 14:42:51,191 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=103, PETRI_PLACES=37, PETRI_TRANSITIONS=41} [2024-10-14 14:42:51,197 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -3 predicate places. [2024-10-14 14:42:51,197 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 41 transitions, 103 flow [2024-10-14 14:42:51,198 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:51,198 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:51,198 INFO L204 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] [2024-10-14 14:42:51,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-14 14:42:51,199 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:51,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:51,201 INFO L85 PathProgramCache]: Analyzing trace with hash 971552426, now seen corresponding path program 1 times [2024-10-14 14:42:51,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:51,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664325698] [2024-10-14 14:42:51,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:51,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:51,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 14:42:51,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:51,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664325698] [2024-10-14 14:42:51,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664325698] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:42:51,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:42:51,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:42:51,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110481982] [2024-10-14 14:42:51,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:51,392 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:42:51,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:51,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:42:51,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:42:51,395 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-10-14 14:42:51,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 41 transitions, 103 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:51,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:51,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-10-14 14:42:51,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:51,653 INFO L124 PetriNetUnfolderBase]: 582/929 cut-off events. [2024-10-14 14:42:51,654 INFO L125 PetriNetUnfolderBase]: For 191/191 co-relation queries the response was YES. [2024-10-14 14:42:51,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2038 conditions, 929 events. 582/929 cut-off events. For 191/191 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4638 event pairs, 357 based on Foata normal form. 36/920 useless extension candidates. Maximal degree in co-relation 896. Up to 652 conditions per place. [2024-10-14 14:42:51,665 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 34 selfloop transitions, 2 changer transitions 16/60 dead transitions. [2024-10-14 14:42:51,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 60 transitions, 251 flow [2024-10-14 14:42:51,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 14:42:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 14:42:51,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-10-14 14:42:51,667 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-10-14 14:42:51,667 INFO L175 Difference]: Start difference. First operand has 37 places, 41 transitions, 103 flow. Second operand 4 states and 96 transitions. [2024-10-14 14:42:51,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 60 transitions, 251 flow [2024-10-14 14:42:51,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 60 transitions, 248 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:42:51,669 INFO L231 Difference]: Finished difference. Result has 41 places, 42 transitions, 116 flow [2024-10-14 14:42:51,671 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=41, PETRI_TRANSITIONS=42} [2024-10-14 14:42:51,673 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 1 predicate places. [2024-10-14 14:42:51,673 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 42 transitions, 116 flow [2024-10-14 14:42:51,673 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:51,674 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:51,674 INFO L204 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] [2024-10-14 14:42:51,674 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-14 14:42:51,674 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:51,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:51,675 INFO L85 PathProgramCache]: Analyzing trace with hash -2021955472, now seen corresponding path program 1 times [2024-10-14 14:42:51,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:51,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418260001] [2024-10-14 14:42:51,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:51,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:51,877 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:42:51,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:51,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418260001] [2024-10-14 14:42:51,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418260001] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:42:51,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:42:51,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 14:42:51,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751829060] [2024-10-14 14:42:51,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:51,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:42:51,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:51,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:42:51,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:42:51,882 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-10-14 14:42:51,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 42 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:51,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:51,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-10-14 14:42:51,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:52,160 INFO L124 PetriNetUnfolderBase]: 559/898 cut-off events. [2024-10-14 14:42:52,161 INFO L125 PetriNetUnfolderBase]: For 348/348 co-relation queries the response was YES. [2024-10-14 14:42:52,164 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2033 conditions, 898 events. 559/898 cut-off events. For 348/348 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4498 event pairs, 341 based on Foata normal form. 39/884 useless extension candidates. Maximal degree in co-relation 1577. Up to 655 conditions per place. [2024-10-14 14:42:52,170 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 55 selfloop transitions, 7 changer transitions 0/70 dead transitions. [2024-10-14 14:42:52,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 70 transitions, 320 flow [2024-10-14 14:42:52,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:42:52,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:42:52,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-10-14 14:42:52,173 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5302325581395348 [2024-10-14 14:42:52,174 INFO L175 Difference]: Start difference. First operand has 41 places, 42 transitions, 116 flow. Second operand 5 states and 114 transitions. [2024-10-14 14:42:52,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 70 transitions, 320 flow [2024-10-14 14:42:52,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 70 transitions, 310 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-14 14:42:52,178 INFO L231 Difference]: Finished difference. Result has 45 places, 48 transitions, 170 flow [2024-10-14 14:42:52,178 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=45, PETRI_TRANSITIONS=48} [2024-10-14 14:42:52,180 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 5 predicate places. [2024-10-14 14:42:52,180 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 48 transitions, 170 flow [2024-10-14 14:42:52,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:52,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:52,181 INFO L204 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] [2024-10-14 14:42:52,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-10-14 14:42:52,181 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:52,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:52,182 INFO L85 PathProgramCache]: Analyzing trace with hash 491854487, now seen corresponding path program 1 times [2024-10-14 14:42:52,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:52,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692228464] [2024-10-14 14:42:52,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:52,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:52,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:52,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 14:42:52,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:52,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692228464] [2024-10-14 14:42:52,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692228464] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:42:52,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:42:52,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:42:52,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326393852] [2024-10-14 14:42:52,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:52,399 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:42:52,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:52,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:42:52,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:42:52,401 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-10-14 14:42:52,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 48 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:52,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:52,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-10-14 14:42:52,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:52,716 INFO L124 PetriNetUnfolderBase]: 807/1390 cut-off events. [2024-10-14 14:42:52,716 INFO L125 PetriNetUnfolderBase]: For 529/529 co-relation queries the response was YES. [2024-10-14 14:42:52,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3202 conditions, 1390 events. 807/1390 cut-off events. For 529/529 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 8125 event pairs, 537 based on Foata normal form. 44/1340 useless extension candidates. Maximal degree in co-relation 2336. Up to 832 conditions per place. [2024-10-14 14:42:52,727 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 64 selfloop transitions, 14 changer transitions 1/87 dead transitions. [2024-10-14 14:42:52,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 87 transitions, 482 flow [2024-10-14 14:42:52,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:42:52,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:42:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-10-14 14:42:52,729 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5441860465116279 [2024-10-14 14:42:52,730 INFO L175 Difference]: Start difference. First operand has 45 places, 48 transitions, 170 flow. Second operand 5 states and 117 transitions. [2024-10-14 14:42:52,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 87 transitions, 482 flow [2024-10-14 14:42:52,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 87 transitions, 478 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:42:52,734 INFO L231 Difference]: Finished difference. Result has 51 places, 60 transitions, 305 flow [2024-10-14 14:42:52,734 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=305, PETRI_PLACES=51, PETRI_TRANSITIONS=60} [2024-10-14 14:42:52,735 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2024-10-14 14:42:52,735 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 60 transitions, 305 flow [2024-10-14 14:42:52,735 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:52,735 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:52,736 INFO L204 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] [2024-10-14 14:42:52,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-14 14:42:52,736 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:52,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:52,737 INFO L85 PathProgramCache]: Analyzing trace with hash 147203735, now seen corresponding path program 1 times [2024-10-14 14:42:52,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:52,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680234083] [2024-10-14 14:42:52,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:52,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:52,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:52,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 14:42:52,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:52,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680234083] [2024-10-14 14:42:52,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680234083] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:42:52,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:42:52,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:42:52,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395370857] [2024-10-14 14:42:52,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:52,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:42:52,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:52,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:42:52,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:42:52,856 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-10-14 14:42:52,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 60 transitions, 305 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:52,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:52,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-10-14 14:42:52,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:53,056 INFO L124 PetriNetUnfolderBase]: 638/1138 cut-off events. [2024-10-14 14:42:53,056 INFO L125 PetriNetUnfolderBase]: For 669/669 co-relation queries the response was YES. [2024-10-14 14:42:53,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2826 conditions, 1138 events. 638/1138 cut-off events. For 669/669 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 6152 event pairs, 200 based on Foata normal form. 50/1144 useless extension candidates. Maximal degree in co-relation 2355. Up to 621 conditions per place. [2024-10-14 14:42:53,064 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 49 selfloop transitions, 2 changer transitions 16/75 dead transitions. [2024-10-14 14:42:53,064 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 75 transitions, 490 flow [2024-10-14 14:42:53,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:42:53,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:42:53,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-10-14 14:42:53,065 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-10-14 14:42:53,066 INFO L175 Difference]: Start difference. First operand has 51 places, 60 transitions, 305 flow. Second operand 3 states and 79 transitions. [2024-10-14 14:42:53,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 75 transitions, 490 flow [2024-10-14 14:42:53,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 485 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 14:42:53,070 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 174 flow [2024-10-14 14:42:53,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-10-14 14:42:53,071 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 13 predicate places. [2024-10-14 14:42:53,071 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 174 flow [2024-10-14 14:42:53,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:53,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:53,073 INFO L204 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] [2024-10-14 14:42:53,073 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-14 14:42:53,074 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:53,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:53,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1850563707, now seen corresponding path program 1 times [2024-10-14 14:42:53,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:53,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005672117] [2024-10-14 14:42:53,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:53,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:53,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:42:53,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:53,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005672117] [2024-10-14 14:42:53,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005672117] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:42:53,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679536808] [2024-10-14 14:42:53,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:53,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:42:53,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:42:53,265 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) [2024-10-14 14:42:53,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-14 14:42:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:53,431 INFO L255 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 14:42:53,437 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:42:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:42:53,519 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:42:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:42:53,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679536808] provided 1 perfect and 1 imperfect interpolant sequences [2024-10-14 14:42:53,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-10-14 14:42:53,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 9 [2024-10-14 14:42:53,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377171545] [2024-10-14 14:42:53,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:53,573 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:42:53,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:53,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:42:53,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-10-14 14:42:53,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-10-14 14:42:53,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:53,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:53,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-10-14 14:42:53,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:53,746 INFO L124 PetriNetUnfolderBase]: 454/737 cut-off events. [2024-10-14 14:42:53,747 INFO L125 PetriNetUnfolderBase]: For 819/819 co-relation queries the response was YES. [2024-10-14 14:42:53,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2029 conditions, 737 events. 454/737 cut-off events. For 819/819 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3550 event pairs, 298 based on Foata normal form. 1/693 useless extension candidates. Maximal degree in co-relation 2003. Up to 672 conditions per place. [2024-10-14 14:42:53,754 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 34 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2024-10-14 14:42:53,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 46 transitions, 252 flow [2024-10-14 14:42:53,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:42:53,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:42:53,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 89 transitions. [2024-10-14 14:42:53,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.413953488372093 [2024-10-14 14:42:53,757 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 174 flow. Second operand 5 states and 89 transitions. [2024-10-14 14:42:53,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 46 transitions, 252 flow [2024-10-14 14:42:53,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 46 transitions, 230 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-10-14 14:42:53,761 INFO L231 Difference]: Finished difference. Result has 51 places, 46 transitions, 168 flow [2024-10-14 14:42:53,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=51, PETRI_TRANSITIONS=46} [2024-10-14 14:42:53,762 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2024-10-14 14:42:53,764 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 46 transitions, 168 flow [2024-10-14 14:42:53,764 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.8) internal successors, (79), 5 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:53,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:53,764 INFO L204 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] [2024-10-14 14:42:53,784 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-14 14:42:53,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-14 14:42:53,966 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:53,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:53,967 INFO L85 PathProgramCache]: Analyzing trace with hash 732343031, now seen corresponding path program 1 times [2024-10-14 14:42:53,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:53,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912788892] [2024-10-14 14:42:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:53,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:54,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 14:42:54,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:54,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912788892] [2024-10-14 14:42:54,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912788892] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:42:54,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:42:54,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:42:54,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912842662] [2024-10-14 14:42:54,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:54,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:42:54,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:54,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:42:54,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:42:54,178 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-10-14 14:42:54,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 46 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:54,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:54,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-10-14 14:42:54,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:54,347 INFO L124 PetriNetUnfolderBase]: 562/922 cut-off events. [2024-10-14 14:42:54,348 INFO L125 PetriNetUnfolderBase]: For 890/890 co-relation queries the response was YES. [2024-10-14 14:42:54,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2466 conditions, 922 events. 562/922 cut-off events. For 890/890 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 4544 event pairs, 139 based on Foata normal form. 22/908 useless extension candidates. Maximal degree in co-relation 2440. Up to 548 conditions per place. [2024-10-14 14:42:54,355 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 49 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-10-14 14:42:54,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 59 transitions, 320 flow [2024-10-14 14:42:54,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:42:54,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:42:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-10-14 14:42:54,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5968992248062015 [2024-10-14 14:42:54,356 INFO L175 Difference]: Start difference. First operand has 51 places, 46 transitions, 168 flow. Second operand 3 states and 77 transitions. [2024-10-14 14:42:54,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 59 transitions, 320 flow [2024-10-14 14:42:54,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 59 transitions, 312 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-10-14 14:42:54,359 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 172 flow [2024-10-14 14:42:54,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=172, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-10-14 14:42:54,360 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 11 predicate places. [2024-10-14 14:42:54,360 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 172 flow [2024-10-14 14:42:54,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:54,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:54,361 INFO L204 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] [2024-10-14 14:42:54,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-10-14 14:42:54,361 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:54,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:54,362 INFO L85 PathProgramCache]: Analyzing trace with hash 333029632, now seen corresponding path program 1 times [2024-10-14 14:42:54,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:54,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486720933] [2024-10-14 14:42:54,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:54,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:54,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 14:42:54,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:54,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486720933] [2024-10-14 14:42:54,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486720933] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:42:54,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:42:54,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:42:54,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911269833] [2024-10-14 14:42:54,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:54,583 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:42:54,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:54,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:42:54,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:42:54,584 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-10-14 14:42:54,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 172 flow. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:54,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:54,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-10-14 14:42:54,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:54,811 INFO L124 PetriNetUnfolderBase]: 587/940 cut-off events. [2024-10-14 14:42:54,812 INFO L125 PetriNetUnfolderBase]: For 1099/1099 co-relation queries the response was YES. [2024-10-14 14:42:54,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2710 conditions, 940 events. 587/940 cut-off events. For 1099/1099 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4544 event pairs, 380 based on Foata normal form. 21/938 useless extension candidates. Maximal degree in co-relation 2683. Up to 817 conditions per place. [2024-10-14 14:42:54,819 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 38 selfloop transitions, 2 changer transitions 22/70 dead transitions. [2024-10-14 14:42:54,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 375 flow [2024-10-14 14:42:54,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:42:54,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:42:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-10-14 14:42:54,820 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4930232558139535 [2024-10-14 14:42:54,820 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 172 flow. Second operand 5 states and 106 transitions. [2024-10-14 14:42:54,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 375 flow [2024-10-14 14:42:54,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 70 transitions, 373 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:42:54,823 INFO L231 Difference]: Finished difference. Result has 57 places, 48 transitions, 192 flow [2024-10-14 14:42:54,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=57, PETRI_TRANSITIONS=48} [2024-10-14 14:42:54,824 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 17 predicate places. [2024-10-14 14:42:54,824 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 48 transitions, 192 flow [2024-10-14 14:42:54,825 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:54,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:54,825 INFO L204 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] [2024-10-14 14:42:54,825 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-14 14:42:54,825 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:54,826 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:54,826 INFO L85 PathProgramCache]: Analyzing trace with hash -211148251, now seen corresponding path program 1 times [2024-10-14 14:42:54,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:54,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771919500] [2024-10-14 14:42:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:54,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:54,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:55,058 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 14:42:55,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:55,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771919500] [2024-10-14 14:42:55,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771919500] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:42:55,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:42:55,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:42:55,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234441690] [2024-10-14 14:42:55,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:55,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:42:55,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:55,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:42:55,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:42:55,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 43 [2024-10-14 14:42:55,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 48 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:55,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:55,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 43 [2024-10-14 14:42:55,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:55,425 INFO L124 PetriNetUnfolderBase]: 1156/1786 cut-off events. [2024-10-14 14:42:55,425 INFO L125 PetriNetUnfolderBase]: For 1929/1929 co-relation queries the response was YES. [2024-10-14 14:42:55,428 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4998 conditions, 1786 events. 1156/1786 cut-off events. For 1929/1929 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 8770 event pairs, 242 based on Foata normal form. 123/1900 useless extension candidates. Maximal degree in co-relation 4968. Up to 538 conditions per place. [2024-10-14 14:42:55,437 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 74 selfloop transitions, 10 changer transitions 0/89 dead transitions. [2024-10-14 14:42:55,437 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 89 transitions, 525 flow [2024-10-14 14:42:55,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:42:55,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:42:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-10-14 14:42:55,438 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5069767441860465 [2024-10-14 14:42:55,439 INFO L175 Difference]: Start difference. First operand has 57 places, 48 transitions, 192 flow. Second operand 5 states and 109 transitions. [2024-10-14 14:42:55,439 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 89 transitions, 525 flow [2024-10-14 14:42:55,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 89 transitions, 509 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-10-14 14:42:55,443 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 250 flow [2024-10-14 14:42:55,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=250, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-10-14 14:42:55,444 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-10-14 14:42:55,445 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 250 flow [2024-10-14 14:42:55,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:55,446 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:55,446 INFO L204 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] [2024-10-14 14:42:55,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-14 14:42:55,446 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:55,447 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:55,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1097744205, now seen corresponding path program 2 times [2024-10-14 14:42:55,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:55,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146025863] [2024-10-14 14:42:55,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:55,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:55,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-14 14:42:55,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:55,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146025863] [2024-10-14 14:42:55,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146025863] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:42:55,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:42:55,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:42:55,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687252838] [2024-10-14 14:42:55,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:55,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 14:42:55,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:55,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 14:42:55,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 14:42:55,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-10-14 14:42:55,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 250 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:55,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:55,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-10-14 14:42:55,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:56,092 INFO L124 PetriNetUnfolderBase]: 999/1618 cut-off events. [2024-10-14 14:42:56,092 INFO L125 PetriNetUnfolderBase]: For 3419/3558 co-relation queries the response was YES. [2024-10-14 14:42:56,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5354 conditions, 1618 events. 999/1618 cut-off events. For 3419/3558 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 8214 event pairs, 548 based on Foata normal form. 166/1687 useless extension candidates. Maximal degree in co-relation 5321. Up to 1141 conditions per place. [2024-10-14 14:42:56,105 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 41 selfloop transitions, 2 changer transitions 24/80 dead transitions. [2024-10-14 14:42:56,106 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 488 flow [2024-10-14 14:42:56,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 14:42:56,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 14:42:56,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 109 transitions. [2024-10-14 14:42:56,107 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5069767441860465 [2024-10-14 14:42:56,107 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 250 flow. Second operand 5 states and 109 transitions. [2024-10-14 14:42:56,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 488 flow [2024-10-14 14:42:56,111 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 488 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 14:42:56,112 INFO L231 Difference]: Finished difference. Result has 67 places, 56 transitions, 272 flow [2024-10-14 14:42:56,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=272, PETRI_PLACES=67, PETRI_TRANSITIONS=56} [2024-10-14 14:42:56,113 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 27 predicate places. [2024-10-14 14:42:56,114 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 56 transitions, 272 flow [2024-10-14 14:42:56,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:56,114 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:56,114 INFO L204 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] [2024-10-14 14:42:56,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-14 14:42:56,115 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:56,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:56,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1343305931, now seen corresponding path program 1 times [2024-10-14 14:42:56,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:56,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385841878] [2024-10-14 14:42:56,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:56,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:56,430 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-10-14 14:42:56,430 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:56,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385841878] [2024-10-14 14:42:56,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385841878] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:42:56,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:42:56,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 14:42:56,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224348806] [2024-10-14 14:42:56,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:56,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 14:42:56,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:56,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 14:42:56,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-14 14:42:56,447 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 43 [2024-10-14 14:42:56,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 56 transitions, 272 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:56,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:56,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 43 [2024-10-14 14:42:56,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:56,960 INFO L124 PetriNetUnfolderBase]: 1500/2297 cut-off events. [2024-10-14 14:42:56,961 INFO L125 PetriNetUnfolderBase]: For 4107/4115 co-relation queries the response was YES. [2024-10-14 14:42:56,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7777 conditions, 2297 events. 1500/2297 cut-off events. For 4107/4115 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 11570 event pairs, 47 based on Foata normal form. 52/2344 useless extension candidates. Maximal degree in co-relation 7744. Up to 988 conditions per place. [2024-10-14 14:42:56,977 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 89 selfloop transitions, 11 changer transitions 0/108 dead transitions. [2024-10-14 14:42:56,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 108 transitions, 732 flow [2024-10-14 14:42:56,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 14:42:56,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 14:42:56,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-10-14 14:42:56,979 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5038759689922481 [2024-10-14 14:42:56,979 INFO L175 Difference]: Start difference. First operand has 67 places, 56 transitions, 272 flow. Second operand 6 states and 130 transitions. [2024-10-14 14:42:56,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 108 transitions, 732 flow [2024-10-14 14:42:56,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 712 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-10-14 14:42:56,985 INFO L231 Difference]: Finished difference. Result has 70 places, 63 transitions, 348 flow [2024-10-14 14:42:56,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=348, PETRI_PLACES=70, PETRI_TRANSITIONS=63} [2024-10-14 14:42:56,986 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 30 predicate places. [2024-10-14 14:42:56,986 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 63 transitions, 348 flow [2024-10-14 14:42:56,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:56,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:56,986 INFO L204 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] [2024-10-14 14:42:56,986 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-10-14 14:42:56,987 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:56,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:56,987 INFO L85 PathProgramCache]: Analyzing trace with hash 75926374, now seen corresponding path program 1 times [2024-10-14 14:42:56,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:56,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006585196] [2024-10-14 14:42:56,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:56,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:57,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:42:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-10-14 14:42:57,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:42:57,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006585196] [2024-10-14 14:42:57,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006585196] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 14:42:57,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 14:42:57,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 14:42:57,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39188124] [2024-10-14 14:42:57,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 14:42:57,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 14:42:57,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-14 14:42:57,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 14:42:57,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 14:42:57,135 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-10-14 14:42:57,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 63 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:57,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 14:42:57,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-10-14 14:42:57,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 14:42:57,454 INFO L124 PetriNetUnfolderBase]: 1046/1662 cut-off events. [2024-10-14 14:42:57,455 INFO L125 PetriNetUnfolderBase]: For 4682/4842 co-relation queries the response was YES. [2024-10-14 14:42:57,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6384 conditions, 1662 events. 1046/1662 cut-off events. For 4682/4842 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 8158 event pairs, 300 based on Foata normal form. 189/1790 useless extension candidates. Maximal degree in co-relation 6345. Up to 826 conditions per place. [2024-10-14 14:42:57,473 INFO L140 encePairwiseOnDemand]: 40/43 looper letters, 57 selfloop transitions, 3 changer transitions 0/77 dead transitions. [2024-10-14 14:42:57,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 77 transitions, 555 flow [2024-10-14 14:42:57,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 14:42:57,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 14:42:57,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2024-10-14 14:42:57,475 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5813953488372093 [2024-10-14 14:42:57,475 INFO L175 Difference]: Start difference. First operand has 70 places, 63 transitions, 348 flow. Second operand 3 states and 75 transitions. [2024-10-14 14:42:57,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 77 transitions, 555 flow [2024-10-14 14:42:57,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 77 transitions, 552 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 14:42:57,482 INFO L231 Difference]: Finished difference. Result has 72 places, 64 transitions, 367 flow [2024-10-14 14:42:57,482 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=367, PETRI_PLACES=72, PETRI_TRANSITIONS=64} [2024-10-14 14:42:57,484 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2024-10-14 14:42:57,484 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 64 transitions, 367 flow [2024-10-14 14:42:57,485 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 14:42:57,485 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 14:42:57,485 INFO L204 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] [2024-10-14 14:42:57,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-14 14:42:57,486 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-10-14 14:42:57,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 14:42:57,486 INFO L85 PathProgramCache]: Analyzing trace with hash -135093256, now seen corresponding path program 1 times [2024-10-14 14:42:57,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-14 14:42:57,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771555347] [2024-10-14 14:42:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:42:57,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-14 14:42:57,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:00,062 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-14 14:43:00,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-14 14:43:00,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771555347] [2024-10-14 14:43:00,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771555347] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-14 14:43:00,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282723759] [2024-10-14 14:43:00,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 14:43:00,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-14 14:43:00,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 14:43:00,065 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) [2024-10-14 14:43:00,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-14 14:43:00,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 14:43:00,267 INFO L255 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-10-14 14:43:00,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 14:43:00,382 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-14 14:43:00,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-14 14:43:00,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-10-14 14:43:00,764 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 23 [2024-10-14 14:43:00,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2024-10-14 14:43:00,805 INFO L349 Elim1Store]: treesize reduction 20, result has 62.3 percent of original size [2024-10-14 14:43:00,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 45 [2024-10-14 14:43:00,823 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-14 14:43:00,824 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 14:43:01,857 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 91 [2024-10-14 14:43:01,876 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:43:01,876 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 314 treesize of output 298 [2024-10-14 14:43:01,886 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 290 treesize of output 274 [2024-10-14 14:43:01,903 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:43:01,904 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 806 treesize of output 718 [2024-10-14 14:43:07,234 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-14 14:43:07,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 2174 treesize of output 2070 [2024-10-14 14:43:08,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 867 treesize of output 753