./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/pthread/bigshot_s.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/pthread/bigshot_s.i -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 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 07:59:32,030 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 07:59:32,085 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-12 07:59:32,090 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 07:59:32,093 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 07:59:32,124 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 07:59:32,125 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 07:59:32,125 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 07:59:32,126 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 07:59:32,127 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 07:59:32,127 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 07:59:32,128 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 07:59:32,128 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 07:59:32,129 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 07:59:32,130 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 07:59:32,130 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 07:59:32,130 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-12 07:59:32,130 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 07:59:32,131 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 07:59:32,131 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 07:59:32,131 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 07:59:32,133 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-12 07:59:32,133 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 07:59:32,133 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-12 07:59:32,133 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 07:59:32,134 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 07:59:32,134 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-12 07:59:32,134 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 07:59:32,134 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 07:59:32,134 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 07:59:32,135 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 07:59:32,135 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 07:59:32,135 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 07:59:32,136 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 07:59:32,136 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 07:59:32,143 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-12 07:59:32,143 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 07:59:32,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 07:59:32,143 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 07:59:32,143 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 07:59:32,143 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 07:59:32,144 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 07:59:32,144 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d8c741fd238f074816319de9a9bd5d97cd9b35eb7f53a276be973ea0c31ecbe [2024-11-12 07:59:32,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 07:59:32,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 07:59:32,378 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 07:59:32,379 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 07:59:32,380 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 07:59:32,381 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/bigshot_s.i [2024-11-12 07:59:33,615 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 07:59:33,830 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 07:59:33,832 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i [2024-11-12 07:59:33,845 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20395d5b9/0f9be09baf7346708b8901615fcfabf1/FLAG47a21c087 [2024-11-12 07:59:34,165 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/20395d5b9/0f9be09baf7346708b8901615fcfabf1 [2024-11-12 07:59:34,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 07:59:34,167 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 07:59:34,169 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 07:59:34,170 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 07:59:34,173 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 07:59:34,174 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,174 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8c4ed73 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34, skipping insertion in model container [2024-11-12 07:59:34,174 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,213 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 07:59:34,577 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i[55202,55215] [2024-11-12 07:59:34,591 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 07:59:34,599 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 07:59:34,641 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/bigshot_s.i[55202,55215] [2024-11-12 07:59:34,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 07:59:34,700 INFO L204 MainTranslator]: Completed translation [2024-11-12 07:59:34,701 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34 WrapperNode [2024-11-12 07:59:34,701 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 07:59:34,702 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 07:59:34,702 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 07:59:34,703 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 07:59:34,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,729 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,747 INFO L138 Inliner]: procedures = 322, calls = 23, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 61 [2024-11-12 07:59:34,748 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 07:59:34,749 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 07:59:34,749 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 07:59:34,749 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 07:59:34,756 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,757 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,759 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,769 INFO L175 MemorySlicer]: Split 13 memory accesses to 3 slices as follows [2, 9, 2]. 69 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8, 0]. The 1 writes are split as follows [0, 0, 1]. [2024-11-12 07:59:34,770 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,770 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,776 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,779 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,781 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,781 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,783 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 07:59:34,784 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 07:59:34,784 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 07:59:34,784 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 07:59:34,784 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (1/1) ... [2024-11-12 07:59:34,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 07:59:34,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:34,810 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) [2024-11-12 07:59:34,811 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 [2024-11-12 07:59:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2024-11-12 07:59:34,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2024-11-12 07:59:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#2 [2024-11-12 07:59:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 07:59:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 07:59:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-12 07:59:34,846 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 07:59:34,846 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 07:59:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 07:59:34,847 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 07:59:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 07:59:34,847 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 07:59:34,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 07:59:34,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 07:59:34,848 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-12 07:59:34,848 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 07:59:34,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 07:59:34,849 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 07:59:34,956 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 07:59:34,957 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 07:59:35,051 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 07:59:35,051 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 07:59:35,176 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 07:59:35,176 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-12 07:59:35,176 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:59:35 BoogieIcfgContainer [2024-11-12 07:59:35,176 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 07:59:35,178 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 07:59:35,178 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 07:59:35,181 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 07:59:35,181 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 07:59:34" (1/3) ... [2024-11-12 07:59:35,181 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5355d2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:59:35, skipping insertion in model container [2024-11-12 07:59:35,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 07:59:34" (2/3) ... [2024-11-12 07:59:35,182 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5355d2e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 07:59:35, skipping insertion in model container [2024-11-12 07:59:35,182 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 07:59:35" (3/3) ... [2024-11-12 07:59:35,183 INFO L112 eAbstractionObserver]: Analyzing ICFG bigshot_s.i [2024-11-12 07:59:35,195 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 07:59:35,196 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-12 07:59:35,196 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 07:59:35,225 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 07:59:35,249 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 29 places, 26 transitions, 66 flow [2024-11-12 07:59:35,268 INFO L124 PetriNetUnfolderBase]: 4/24 cut-off events. [2024-11-12 07:59:35,268 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 07:59:35,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33 conditions, 24 events. 4/24 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 16 event pairs, 0 based on Foata normal form. 0/19 useless extension candidates. Maximal degree in co-relation 22. Up to 2 conditions per place. [2024-11-12 07:59:35,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 26 transitions, 66 flow [2024-11-12 07:59:35,272 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 25 places, 21 transitions, 54 flow [2024-11-12 07:59:35,279 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 07:59:35,284 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;@2bde6a8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 07:59:35,284 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-12 07:59:35,290 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 07:59:35,290 INFO L124 PetriNetUnfolderBase]: 3/20 cut-off events. [2024-11-12 07:59:35,291 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 07:59:35,291 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:35,291 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:35,292 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:35,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:35,298 INFO L85 PathProgramCache]: Analyzing trace with hash -1687339131, now seen corresponding path program 1 times [2024-11-12 07:59:35,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:35,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338182360] [2024-11-12 07:59:35,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:35,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:35,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:35,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:35,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338182360] [2024-11-12 07:59:35,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338182360] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 07:59:35,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 07:59:35,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 07:59:35,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006284658] [2024-11-12 07:59:35,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 07:59:35,544 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 07:59:35,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:35,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 07:59:35,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 07:59:35,571 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-11-12 07:59:35,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 21 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:35,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:35,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-11-12 07:59:35,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:35,616 INFO L124 PetriNetUnfolderBase]: 7/31 cut-off events. [2024-11-12 07:59:35,616 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 07:59:35,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 31 events. 7/31 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 19 event pairs, 4 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 46. Up to 23 conditions per place. [2024-11-12 07:59:35,617 INFO L140 encePairwiseOnDemand]: 23/26 looper letters, 15 selfloop transitions, 1 changer transitions 0/20 dead transitions. [2024-11-12 07:59:35,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 20 transitions, 84 flow [2024-11-12 07:59:35,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 07:59:35,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 07:59:35,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 39 transitions. [2024-11-12 07:59:35,626 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-12 07:59:35,628 INFO L175 Difference]: Start difference. First operand has 25 places, 21 transitions, 54 flow. Second operand 3 states and 39 transitions. [2024-11-12 07:59:35,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 20 transitions, 84 flow [2024-11-12 07:59:35,630 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 23 places, 20 transitions, 76 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 07:59:35,634 INFO L231 Difference]: Finished difference. Result has 23 places, 19 transitions, 44 flow [2024-11-12 07:59:35,635 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=42, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=44, PETRI_PLACES=23, PETRI_TRANSITIONS=19} [2024-11-12 07:59:35,639 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, -2 predicate places. [2024-11-12 07:59:35,639 INFO L471 AbstractCegarLoop]: Abstraction has has 23 places, 19 transitions, 44 flow [2024-11-12 07:59:35,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:35,640 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:35,640 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:35,640 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 07:59:35,640 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:35,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:35,641 INFO L85 PathProgramCache]: Analyzing trace with hash -1922285189, now seen corresponding path program 1 times [2024-11-12 07:59:35,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:35,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607425787] [2024-11-12 07:59:35,641 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:35,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:36,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:36,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:36,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607425787] [2024-11-12 07:59:36,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607425787] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 07:59:36,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 07:59:36,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-12 07:59:36,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301185366] [2024-11-12 07:59:36,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 07:59:36,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 07:59:36,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:36,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 07:59:36,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-12 07:59:36,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 26 [2024-11-12 07:59:36,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 19 transitions, 44 flow. Second operand has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 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) [2024-11-12 07:59:36,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:36,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 26 [2024-11-12 07:59:36,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:36,248 INFO L124 PetriNetUnfolderBase]: 12/49 cut-off events. [2024-11-12 07:59:36,248 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 07:59:36,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 49 events. 12/49 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 77 event pairs, 4 based on Foata normal form. 1/48 useless extension candidates. Maximal degree in co-relation 82. Up to 24 conditions per place. [2024-11-12 07:59:36,249 INFO L140 encePairwiseOnDemand]: 18/26 looper letters, 17 selfloop transitions, 6 changer transitions 5/31 dead transitions. [2024-11-12 07:59:36,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 31 transitions, 125 flow [2024-11-12 07:59:36,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 07:59:36,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 07:59:36,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 74 transitions. [2024-11-12 07:59:36,252 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3162393162393162 [2024-11-12 07:59:36,252 INFO L175 Difference]: Start difference. First operand has 23 places, 19 transitions, 44 flow. Second operand 9 states and 74 transitions. [2024-11-12 07:59:36,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 31 transitions, 125 flow [2024-11-12 07:59:36,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 31 transitions, 124 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 07:59:36,255 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 73 flow [2024-11-12 07:59:36,255 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=43, PETRI_DIFFERENCE_MINUEND_PLACES=22, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=73, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2024-11-12 07:59:36,256 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 8 predicate places. [2024-11-12 07:59:36,256 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 73 flow [2024-11-12 07:59:36,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.875) internal successors, (55), 8 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) [2024-11-12 07:59:36,256 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:36,256 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:36,256 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 07:59:36,257 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:36,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:36,257 INFO L85 PathProgramCache]: Analyzing trace with hash 2079180860, now seen corresponding path program 1 times [2024-11-12 07:59:36,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:36,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990839229] [2024-11-12 07:59:36,258 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:36,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:36,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:36,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:36,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:36,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990839229] [2024-11-12 07:59:36,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990839229] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:36,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816832462] [2024-11-12 07:59:36,372 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:36,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:36,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:36,375 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) [2024-11-12 07:59:36,375 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 07:59:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:36,443 INFO L256 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-12 07:59:36,446 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:36,544 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 15 treesize of output 7 [2024-11-12 07:59:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:36,556 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 07:59:36,613 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:36,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816832462] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 07:59:36,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 07:59:36,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-12 07:59:36,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226968735] [2024-11-12 07:59:36,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 07:59:36,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 07:59:36,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:36,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 07:59:36,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-12 07:59:36,616 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-11-12 07:59:36,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 73 flow. Second operand has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:36,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:36,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-11-12 07:59:36,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:36,737 INFO L124 PetriNetUnfolderBase]: 14/50 cut-off events. [2024-11-12 07:59:36,738 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 07:59:36,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 132 conditions, 50 events. 14/50 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 50 event pairs, 6 based on Foata normal form. 2/51 useless extension candidates. Maximal degree in co-relation 123. Up to 29 conditions per place. [2024-11-12 07:59:36,740 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 19 selfloop transitions, 6 changer transitions 1/29 dead transitions. [2024-11-12 07:59:36,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 143 flow [2024-11-12 07:59:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 07:59:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 07:59:36,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 76 transitions. [2024-11-12 07:59:36,743 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4175824175824176 [2024-11-12 07:59:36,743 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 73 flow. Second operand 7 states and 76 transitions. [2024-11-12 07:59:36,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 143 flow [2024-11-12 07:59:36,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 136 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-12 07:59:36,744 INFO L231 Difference]: Finished difference. Result has 35 places, 24 transitions, 96 flow [2024-11-12 07:59:36,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=16, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=96, PETRI_PLACES=35, PETRI_TRANSITIONS=24} [2024-11-12 07:59:36,745 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 10 predicate places. [2024-11-12 07:59:36,745 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 24 transitions, 96 flow [2024-11-12 07:59:36,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 9.928571428571429) internal successors, (139), 14 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:36,747 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:36,747 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:36,764 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 07:59:36,951 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:36,952 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:36,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:36,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1577510395, now seen corresponding path program 2 times [2024-11-12 07:59:36,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:36,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435645372] [2024-11-12 07:59:36,956 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:36,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:37,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:37,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:37,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435645372] [2024-11-12 07:59:37,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435645372] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:37,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977958259] [2024-11-12 07:59:37,131 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 07:59:37,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:37,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:37,133 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) [2024-11-12 07:59:37,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 07:59:37,208 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 07:59:37,209 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 07:59:37,210 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-12 07:59:37,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:37,309 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 15 treesize of output 7 [2024-11-12 07:59:37,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:37,322 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 07:59:37,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:37,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977958259] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 07:59:37,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 07:59:37,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-12 07:59:37,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201927043] [2024-11-12 07:59:37,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 07:59:37,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-12 07:59:37,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:37,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-12 07:59:37,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2024-11-12 07:59:37,404 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-11-12 07:59:37,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 24 transitions, 96 flow. Second operand has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:37,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:37,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-11-12 07:59:37,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:37,562 INFO L124 PetriNetUnfolderBase]: 16/56 cut-off events. [2024-11-12 07:59:37,562 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-11-12 07:59:37,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172 conditions, 56 events. 16/56 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 56 event pairs, 6 based on Foata normal form. 2/57 useless extension candidates. Maximal degree in co-relation 150. Up to 29 conditions per place. [2024-11-12 07:59:37,563 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 21 selfloop transitions, 7 changer transitions 1/32 dead transitions. [2024-11-12 07:59:37,563 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 32 transitions, 180 flow [2024-11-12 07:59:37,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-12 07:59:37,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-12 07:59:37,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-11-12 07:59:37,567 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41346153846153844 [2024-11-12 07:59:37,567 INFO L175 Difference]: Start difference. First operand has 35 places, 24 transitions, 96 flow. Second operand 8 states and 86 transitions. [2024-11-12 07:59:37,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 32 transitions, 180 flow [2024-11-12 07:59:37,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 32 transitions, 168 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-12 07:59:37,569 INFO L231 Difference]: Finished difference. Result has 40 places, 26 transitions, 120 flow [2024-11-12 07:59:37,569 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=120, PETRI_PLACES=40, PETRI_TRANSITIONS=26} [2024-11-12 07:59:37,570 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 15 predicate places. [2024-11-12 07:59:37,570 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 26 transitions, 120 flow [2024-11-12 07:59:37,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.882352941176471) internal successors, (168), 17 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:37,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:37,571 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:37,586 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 07:59:37,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-11-12 07:59:37,776 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:37,777 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:37,777 INFO L85 PathProgramCache]: Analyzing trace with hash -2096330670, now seen corresponding path program 3 times [2024-11-12 07:59:37,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:37,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982558179] [2024-11-12 07:59:37,777 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:37,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:37,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:37,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:37,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982558179] [2024-11-12 07:59:37,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982558179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:37,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447061903] [2024-11-12 07:59:37,946 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 07:59:37,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:37,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:37,948 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 07:59:37,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 07:59:38,009 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-12 07:59:38,009 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 07:59:38,010 INFO L256 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 07:59:38,011 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:38,112 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 15 treesize of output 7 [2024-11-12 07:59:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:38,124 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 07:59:38,212 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:38,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447061903] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 07:59:38,213 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 07:59:38,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 19 [2024-11-12 07:59:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882999583] [2024-11-12 07:59:38,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 07:59:38,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 07:59:38,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:38,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 07:59:38,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-11-12 07:59:38,215 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-11-12 07:59:38,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 26 transitions, 120 flow. Second operand has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:38,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:38,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-11-12 07:59:38,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:38,450 INFO L124 PetriNetUnfolderBase]: 18/62 cut-off events. [2024-11-12 07:59:38,450 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-12 07:59:38,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 62 events. 18/62 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 6 based on Foata normal form. 2/63 useless extension candidates. Maximal degree in co-relation 188. Up to 29 conditions per place. [2024-11-12 07:59:38,451 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 23 selfloop transitions, 8 changer transitions 1/35 dead transitions. [2024-11-12 07:59:38,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 35 transitions, 218 flow [2024-11-12 07:59:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 07:59:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 07:59:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 96 transitions. [2024-11-12 07:59:38,452 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41025641025641024 [2024-11-12 07:59:38,452 INFO L175 Difference]: Start difference. First operand has 40 places, 26 transitions, 120 flow. Second operand 9 states and 96 transitions. [2024-11-12 07:59:38,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 35 transitions, 218 flow [2024-11-12 07:59:38,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 35 transitions, 200 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-11-12 07:59:38,454 INFO L231 Difference]: Finished difference. Result has 45 places, 28 transitions, 144 flow [2024-11-12 07:59:38,454 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=144, PETRI_PLACES=45, PETRI_TRANSITIONS=28} [2024-11-12 07:59:38,455 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 20 predicate places. [2024-11-12 07:59:38,455 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 28 transitions, 144 flow [2024-11-12 07:59:38,455 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.75) internal successors, (195), 20 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:38,455 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:38,455 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:38,469 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-12 07:59:38,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:38,660 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:38,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:38,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1889554351, now seen corresponding path program 4 times [2024-11-12 07:59:38,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:38,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142406618] [2024-11-12 07:59:38,661 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:38,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:38,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:38,831 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:38,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142406618] [2024-11-12 07:59:38,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142406618] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:38,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95130030] [2024-11-12 07:59:38,832 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-12 07:59:38,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:38,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:38,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 07:59:38,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 07:59:38,924 INFO L229 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-12 07:59:38,925 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 07:59:38,926 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 07:59:38,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:39,060 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 15 treesize of output 7 [2024-11-12 07:59:39,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:39,072 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 07:59:39,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:39,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95130030] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 07:59:39,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 07:59:39,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 22 [2024-11-12 07:59:39,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496931615] [2024-11-12 07:59:39,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 07:59:39,179 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-12 07:59:39,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:39,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-12 07:59:39,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=422, Unknown=0, NotChecked=0, Total=506 [2024-11-12 07:59:39,186 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-11-12 07:59:39,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 28 transitions, 144 flow. Second operand has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:39,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:39,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-11-12 07:59:39,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:39,451 INFO L124 PetriNetUnfolderBase]: 20/68 cut-off events. [2024-11-12 07:59:39,452 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-11-12 07:59:39,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 252 conditions, 68 events. 20/68 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 70 event pairs, 6 based on Foata normal form. 2/69 useless extension candidates. Maximal degree in co-relation 226. Up to 29 conditions per place. [2024-11-12 07:59:39,453 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 25 selfloop transitions, 9 changer transitions 1/38 dead transitions. [2024-11-12 07:59:39,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 38 transitions, 256 flow [2024-11-12 07:59:39,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 07:59:39,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 07:59:39,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-11-12 07:59:39,454 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4076923076923077 [2024-11-12 07:59:39,454 INFO L175 Difference]: Start difference. First operand has 45 places, 28 transitions, 144 flow. Second operand 10 states and 106 transitions. [2024-11-12 07:59:39,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 38 transitions, 256 flow [2024-11-12 07:59:39,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 38 transitions, 232 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-12 07:59:39,456 INFO L231 Difference]: Finished difference. Result has 50 places, 30 transitions, 168 flow [2024-11-12 07:59:39,456 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=168, PETRI_PLACES=50, PETRI_TRANSITIONS=30} [2024-11-12 07:59:39,457 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 25 predicate places. [2024-11-12 07:59:39,457 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 30 transitions, 168 flow [2024-11-12 07:59:39,457 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 9.652173913043478) internal successors, (222), 23 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:39,457 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:39,457 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:39,473 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 07:59:39,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:39,658 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:39,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:39,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1214231500, now seen corresponding path program 5 times [2024-11-12 07:59:39,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:39,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850178778] [2024-11-12 07:59:39,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:39,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:39,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:39,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:39,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:39,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850178778] [2024-11-12 07:59:39,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850178778] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:39,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593429329] [2024-11-12 07:59:39,864 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-12 07:59:39,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:39,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:39,866 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 07:59:39,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 07:59:39,933 INFO L229 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-11-12 07:59:39,933 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 07:59:39,934 INFO L256 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-12 07:59:39,935 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:40,097 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 15 treesize of output 7 [2024-11-12 07:59:40,111 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:40,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 07:59:40,219 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:40,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593429329] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 07:59:40,219 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 07:59:40,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2024-11-12 07:59:40,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792681483] [2024-11-12 07:59:40,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 07:59:40,220 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-12 07:59:40,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:40,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-12 07:59:40,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-11-12 07:59:40,229 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-11-12 07:59:40,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 30 transitions, 168 flow. Second operand has 26 states, 26 states have (on average 9.576923076923077) internal successors, (249), 26 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:40,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:40,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-11-12 07:59:40,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:40,554 INFO L124 PetriNetUnfolderBase]: 22/74 cut-off events. [2024-11-12 07:59:40,554 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2024-11-12 07:59:40,555 INFO L83 FinitePrefix]: Finished finitePrefix Result has 292 conditions, 74 events. 22/74 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 74 event pairs, 6 based on Foata normal form. 2/75 useless extension candidates. Maximal degree in co-relation 264. Up to 29 conditions per place. [2024-11-12 07:59:40,555 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 27 selfloop transitions, 10 changer transitions 1/41 dead transitions. [2024-11-12 07:59:40,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 41 transitions, 294 flow [2024-11-12 07:59:40,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 07:59:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 07:59:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-11-12 07:59:40,557 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40559440559440557 [2024-11-12 07:59:40,557 INFO L175 Difference]: Start difference. First operand has 50 places, 30 transitions, 168 flow. Second operand 11 states and 116 transitions. [2024-11-12 07:59:40,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 41 transitions, 294 flow [2024-11-12 07:59:40,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 41 transitions, 264 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-11-12 07:59:40,560 INFO L231 Difference]: Finished difference. Result has 55 places, 32 transitions, 192 flow [2024-11-12 07:59:40,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=192, PETRI_PLACES=55, PETRI_TRANSITIONS=32} [2024-11-12 07:59:40,561 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 30 predicate places. [2024-11-12 07:59:40,561 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 32 transitions, 192 flow [2024-11-12 07:59:40,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.576923076923077) internal successors, (249), 26 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:40,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:40,561 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:40,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-12 07:59:40,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:40,762 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:40,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:40,763 INFO L85 PathProgramCache]: Analyzing trace with hash 769033385, now seen corresponding path program 6 times [2024-11-12 07:59:40,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:40,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404049853] [2024-11-12 07:59:40,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:40,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:40,989 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:40,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:40,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404049853] [2024-11-12 07:59:40,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404049853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:40,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348128845] [2024-11-12 07:59:40,989 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-12 07:59:40,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:40,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:40,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 07:59:40,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 07:59:41,075 INFO L229 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-11-12 07:59:41,076 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 07:59:41,080 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 07:59:41,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:41,290 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 15 treesize of output 7 [2024-11-12 07:59:41,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:41,303 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 07:59:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:41,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348128845] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 07:59:41,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 07:59:41,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-12 07:59:41,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209231596] [2024-11-12 07:59:41,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 07:59:41,423 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-12 07:59:41,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 07:59:41,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-12 07:59:41,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=702, Unknown=0, NotChecked=0, Total=812 [2024-11-12 07:59:41,426 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 26 [2024-11-12 07:59:41,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 32 transitions, 192 flow. Second operand has 29 states, 29 states have (on average 9.517241379310345) internal successors, (276), 29 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:41,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 07:59:41,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 26 [2024-11-12 07:59:41,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 07:59:41,756 INFO L124 PetriNetUnfolderBase]: 24/80 cut-off events. [2024-11-12 07:59:41,756 INFO L125 PetriNetUnfolderBase]: For 255/255 co-relation queries the response was YES. [2024-11-12 07:59:41,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 332 conditions, 80 events. 24/80 cut-off events. For 255/255 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 80 event pairs, 6 based on Foata normal form. 2/81 useless extension candidates. Maximal degree in co-relation 302. Up to 29 conditions per place. [2024-11-12 07:59:41,757 INFO L140 encePairwiseOnDemand]: 21/26 looper letters, 29 selfloop transitions, 11 changer transitions 1/44 dead transitions. [2024-11-12 07:59:41,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 44 transitions, 332 flow [2024-11-12 07:59:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 07:59:41,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 07:59:41,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 126 transitions. [2024-11-12 07:59:41,761 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40384615384615385 [2024-11-12 07:59:41,761 INFO L175 Difference]: Start difference. First operand has 55 places, 32 transitions, 192 flow. Second operand 12 states and 126 transitions. [2024-11-12 07:59:41,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 44 transitions, 332 flow [2024-11-12 07:59:41,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 44 transitions, 296 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-12 07:59:41,763 INFO L231 Difference]: Finished difference. Result has 60 places, 34 transitions, 216 flow [2024-11-12 07:59:41,764 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=216, PETRI_PLACES=60, PETRI_TRANSITIONS=34} [2024-11-12 07:59:41,766 INFO L279 CegarLoopForPetriNet]: 25 programPoint places, 35 predicate places. [2024-11-12 07:59:41,766 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 34 transitions, 216 flow [2024-11-12 07:59:41,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 9.517241379310345) internal successors, (276), 29 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 07:59:41,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 07:59:41,767 INFO L206 CegarLoopForPetriNet]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 07:59:41,779 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 07:59:41,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:41,967 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-12 07:59:41,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 07:59:41,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1864592826, now seen corresponding path program 7 times [2024-11-12 07:59:41,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 07:59:41,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578539557] [2024-11-12 07:59:41,968 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 07:59:41,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 07:59:41,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:42,908 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 20 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:42,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 07:59:42,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578539557] [2024-11-12 07:59:42,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578539557] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 07:59:42,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796339341] [2024-11-12 07:59:42,909 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-12 07:59:42,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 07:59:42,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 07:59:42,911 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 07:59:42,912 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 07:59:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 07:59:42,995 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-11-12 07:59:42,998 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 07:59:43,068 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 11 treesize of output 7 [2024-11-12 07:59:43,129 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-12 07:59:43,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-12 07:59:43,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-12 07:59:43,251 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 07:59:43,252 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-12 07:59:43,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 07:59:43,298 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-12 07:59:43,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 07:59:43,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-12 07:59:43,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 07:59:43,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2024-11-12 07:59:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 9 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 07:59:43,450 INFO L312 TraceCheckSpWp]: Computing backward predicates...