./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 3289d67d 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/weaver/popl20-counter-fun.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-3289d67-m [2024-11-16 19:29:07,010 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-16 19:29:07,080 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-11-16 19:29:07,086 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-16 19:29:07,088 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-16 19:29:07,139 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-16 19:29:07,140 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-16 19:29:07,140 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-16 19:29:07,141 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-16 19:29:07,141 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-16 19:29:07,141 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-16 19:29:07,142 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-16 19:29:07,143 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-16 19:29:07,145 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-16 19:29:07,148 INFO L153 SettingsManager]: * Use SBE=true [2024-11-16 19:29:07,148 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-16 19:29:07,149 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-16 19:29:07,149 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-16 19:29:07,149 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-16 19:29:07,150 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-16 19:29:07,150 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-16 19:29:07,150 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-16 19:29:07,151 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-16 19:29:07,151 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-16 19:29:07,151 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-16 19:29:07,152 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-16 19:29:07,152 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-16 19:29:07,152 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-16 19:29:07,152 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-16 19:29:07,153 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-16 19:29:07,153 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-16 19:29:07,153 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-16 19:29:07,153 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:29:07,154 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-16 19:29:07,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-16 19:29:07,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-16 19:29:07,157 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-16 19:29:07,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-16 19:29:07,158 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-16 19:29:07,158 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-16 19:29:07,158 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-16 19:29:07,159 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-16 19:29:07,159 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fbe9f324c9eba6beb8c990e3f85f0b00a68548fe05ffdb4e97bc061354d1cdf2 [2024-11-16 19:29:07,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-16 19:29:07,458 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-16 19:29:07,462 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-16 19:29:07,464 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-16 19:29:07,464 INFO L274 PluginConnector]: CDTParser initialized [2024-11-16 19:29:07,466 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-11-16 19:29:08,998 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-16 19:29:09,195 INFO L384 CDTParser]: Found 1 translation units. [2024-11-16 19:29:09,195 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-counter-fun.wvr.c [2024-11-16 19:29:09,203 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8188c9673/92bfd805e67d4678a8aa9a806bb08a84/FLAG0ff6b45c4 [2024-11-16 19:29:09,590 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8188c9673/92bfd805e67d4678a8aa9a806bb08a84 [2024-11-16 19:29:09,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-16 19:29:09,594 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-16 19:29:09,596 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-16 19:29:09,596 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-16 19:29:09,603 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-16 19:29:09,604 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:09,605 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33f0dcc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09, skipping insertion in model container [2024-11-16 19:29:09,605 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:09,635 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-16 19:29:09,846 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/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-11-16 19:29:09,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:29:09,866 INFO L200 MainTranslator]: Completed pre-run [2024-11-16 19:29:09,887 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/weaver/popl20-counter-fun.wvr.c[2707,2720] [2024-11-16 19:29:09,896 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-16 19:29:09,925 INFO L204 MainTranslator]: Completed translation [2024-11-16 19:29:09,926 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09 WrapperNode [2024-11-16 19:29:09,926 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-16 19:29:09,927 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-16 19:29:09,927 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-16 19:29:09,928 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-16 19:29:09,935 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:09,949 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:09,973 INFO L138 Inliner]: procedures = 23, calls = 35, calls flagged for inlining = 13, calls inlined = 15, statements flattened = 187 [2024-11-16 19:29:09,973 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-16 19:29:09,974 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-16 19:29:09,974 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-16 19:29:09,974 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-16 19:29:09,983 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:09,983 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:09,986 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:10,003 INFO L175 MemorySlicer]: Split 14 memory accesses to 2 slices as follows [2, 12]. 86 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-16 19:29:10,003 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:10,003 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:10,011 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:10,012 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:10,013 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:10,015 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:10,017 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-16 19:29:10,018 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-16 19:29:10,019 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-16 19:29:10,019 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-16 19:29:10,019 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (1/1) ... [2024-11-16 19:29:10,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-16 19:29:10,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:10,068 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) [2024-11-16 19:29:10,071 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 [2024-11-16 19:29:10,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-16 19:29:10,123 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-16 19:29:10,123 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-16 19:29:10,124 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-16 19:29:10,124 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-16 19:29:10,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-16 19:29:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-16 19:29:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-16 19:29:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-16 19:29:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-16 19:29:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-16 19:29:10,125 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-16 19:29:10,126 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-16 19:29:10,126 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-16 19:29:10,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-16 19:29:10,126 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-16 19:29:10,129 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-16 19:29:10,256 INFO L256 CfgBuilder]: Building ICFG [2024-11-16 19:29:10,260 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-16 19:29:10,641 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-16 19:29:10,641 INFO L307 CfgBuilder]: Performing block encoding [2024-11-16 19:29:10,928 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-16 19:29:10,930 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-16 19:29:10,930 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:29:10 BoogieIcfgContainer [2024-11-16 19:29:10,930 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-16 19:29:10,933 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-16 19:29:10,933 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-16 19:29:10,938 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-16 19:29:10,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 07:29:09" (1/3) ... [2024-11-16 19:29:10,939 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6458b242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:29:10, skipping insertion in model container [2024-11-16 19:29:10,940 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 07:29:09" (2/3) ... [2024-11-16 19:29:10,941 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6458b242 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 07:29:10, skipping insertion in model container [2024-11-16 19:29:10,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 16.11 07:29:10" (3/3) ... [2024-11-16 19:29:10,943 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-counter-fun.wvr.c [2024-11-16 19:29:10,963 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-16 19:29:10,963 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-16 19:29:10,963 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-16 19:29:11,012 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-16 19:29:11,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 38 transitions, 90 flow [2024-11-16 19:29:11,089 INFO L124 PetriNetUnfolderBase]: 8/36 cut-off events. [2024-11-16 19:29:11,089 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:29:11,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 36 events. 8/36 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 48 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-16 19:29:11,095 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 38 transitions, 90 flow [2024-11-16 19:29:11,098 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 35 transitions, 82 flow [2024-11-16 19:29:11,111 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-16 19:29:11,119 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;@2682d33a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-16 19:29:11,119 INFO L334 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-11-16 19:29:11,135 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-16 19:29:11,136 INFO L124 PetriNetUnfolderBase]: 8/34 cut-off events. [2024-11-16 19:29:11,136 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-16 19:29:11,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:11,137 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:11,138 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:11,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:11,144 INFO L85 PathProgramCache]: Analyzing trace with hash -326550447, now seen corresponding path program 1 times [2024-11-16 19:29:11,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:11,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471791202] [2024-11-16 19:29:11,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:11,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:11,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:11,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:11,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:11,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471791202] [2024-11-16 19:29:11,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471791202] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:11,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:11,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:29:11,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195004333] [2024-11-16 19:29:11,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:11,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-16 19:29:11,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:11,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-16 19:29:11,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-16 19:29:11,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-16 19:29:11,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 35 transitions, 82 flow. Second operand has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:11,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:11,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-16 19:29:11,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:11,483 INFO L124 PetriNetUnfolderBase]: 63/144 cut-off events. [2024-11-16 19:29:11,483 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2024-11-16 19:29:11,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 275 conditions, 144 events. 63/144 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 503 event pairs, 42 based on Foata normal form. 21/150 useless extension candidates. Maximal degree in co-relation 227. Up to 113 conditions per place. [2024-11-16 19:29:11,486 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 20 selfloop transitions, 0 changer transitions 0/31 dead transitions. [2024-11-16 19:29:11,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 114 flow [2024-11-16 19:29:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-16 19:29:11,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2024-11-16 19:29:11,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 50 transitions. [2024-11-16 19:29:11,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6578947368421053 [2024-11-16 19:29:11,500 INFO L175 Difference]: Start difference. First operand has 34 places, 35 transitions, 82 flow. Second operand 2 states and 50 transitions. [2024-11-16 19:29:11,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 114 flow [2024-11-16 19:29:11,503 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 31 transitions, 106 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-16 19:29:11,504 INFO L231 Difference]: Finished difference. Result has 31 places, 31 transitions, 66 flow [2024-11-16 19:29:11,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=31} [2024-11-16 19:29:11,511 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, -3 predicate places. [2024-11-16 19:29:11,511 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 31 transitions, 66 flow [2024-11-16 19:29:11,512 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:11,512 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:11,512 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:11,513 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-16 19:29:11,513 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:11,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:11,514 INFO L85 PathProgramCache]: Analyzing trace with hash -791003220, now seen corresponding path program 1 times [2024-11-16 19:29:11,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:11,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379225408] [2024-11-16 19:29:11,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:11,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:11,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:11,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:11,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:11,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379225408] [2024-11-16 19:29:11,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379225408] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:11,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:11,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-16 19:29:11,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917919032] [2024-11-16 19:29:11,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:11,716 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-16 19:29:11,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:11,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-16 19:29:11,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-16 19:29:11,719 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 38 [2024-11-16 19:29:11,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 31 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:11,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:11,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 38 [2024-11-16 19:29:11,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:11,856 INFO L124 PetriNetUnfolderBase]: 94/223 cut-off events. [2024-11-16 19:29:11,857 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-16 19:29:11,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 400 conditions, 223 events. 94/223 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 908 event pairs, 22 based on Foata normal form. 1/201 useless extension candidates. Maximal degree in co-relation 397. Up to 113 conditions per place. [2024-11-16 19:29:11,859 INFO L140 encePairwiseOnDemand]: 34/38 looper letters, 27 selfloop transitions, 3 changer transitions 1/42 dead transitions. [2024-11-16 19:29:11,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 153 flow [2024-11-16 19:29:11,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-16 19:29:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-16 19:29:11,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-11-16 19:29:11,864 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6228070175438597 [2024-11-16 19:29:11,864 INFO L175 Difference]: Start difference. First operand has 31 places, 31 transitions, 66 flow. Second operand 3 states and 71 transitions. [2024-11-16 19:29:11,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 153 flow [2024-11-16 19:29:11,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 42 transitions, 153 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:29:11,869 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2024-11-16 19:29:11,870 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-11-16 19:29:11,871 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 0 predicate places. [2024-11-16 19:29:11,871 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2024-11-16 19:29:11,872 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:11,872 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:11,872 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:11,873 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-16 19:29:11,874 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:11,874 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:11,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1644826284, now seen corresponding path program 1 times [2024-11-16 19:29:11,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:11,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482336805] [2024-11-16 19:29:11,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:11,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:12,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:12,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482336805] [2024-11-16 19:29:12,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482336805] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:12,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:12,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:12,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616622960] [2024-11-16 19:29:12,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:12,133 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:12,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:12,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:12,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:12,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-16 19:29:12,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:12,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:12,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-16 19:29:12,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:12,444 INFO L124 PetriNetUnfolderBase]: 291/556 cut-off events. [2024-11-16 19:29:12,444 INFO L125 PetriNetUnfolderBase]: For 57/61 co-relation queries the response was YES. [2024-11-16 19:29:12,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1176 conditions, 556 events. 291/556 cut-off events. For 57/61 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2718 event pairs, 93 based on Foata normal form. 0/516 useless extension candidates. Maximal degree in co-relation 1171. Up to 257 conditions per place. [2024-11-16 19:29:12,453 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 52 selfloop transitions, 15 changer transitions 3/78 dead transitions. [2024-11-16 19:29:12,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 78 transitions, 348 flow [2024-11-16 19:29:12,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:29:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:29:12,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-11-16 19:29:12,456 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5526315789473685 [2024-11-16 19:29:12,456 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 6 states and 126 transitions. [2024-11-16 19:29:12,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 78 transitions, 348 flow [2024-11-16 19:29:12,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 78 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:29:12,461 INFO L231 Difference]: Finished difference. Result has 41 places, 47 transitions, 178 flow [2024-11-16 19:29:12,461 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=41, PETRI_TRANSITIONS=47} [2024-11-16 19:29:12,462 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2024-11-16 19:29:12,462 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 47 transitions, 178 flow [2024-11-16 19:29:12,462 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:12,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:12,463 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:12,464 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-16 19:29:12,464 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:12,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:12,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1174677432, now seen corresponding path program 2 times [2024-11-16 19:29:12,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:12,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299186870] [2024-11-16 19:29:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:12,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:12,609 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:12,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:12,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299186870] [2024-11-16 19:29:12,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299186870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:12,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100158070] [2024-11-16 19:29:12,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:29:12,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:12,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:12,614 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) [2024-11-16 19:29:12,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-16 19:29:12,714 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:29:12,714 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:12,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:29:12,722 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:12,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:12,826 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:12,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:12,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100158070] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:12,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:12,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-16 19:29:12,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040750914] [2024-11-16 19:29:12,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:12,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 19:29:12,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:12,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 19:29:12,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-16 19:29:12,896 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:29:12,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 47 transitions, 178 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:12,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:12,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:29:12,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:13,312 INFO L124 PetriNetUnfolderBase]: 426/783 cut-off events. [2024-11-16 19:29:13,312 INFO L125 PetriNetUnfolderBase]: For 499/499 co-relation queries the response was YES. [2024-11-16 19:29:13,315 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2187 conditions, 783 events. 426/783 cut-off events. For 499/499 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3874 event pairs, 37 based on Foata normal form. 15/798 useless extension candidates. Maximal degree in co-relation 2179. Up to 139 conditions per place. [2024-11-16 19:29:13,320 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 90 selfloop transitions, 37 changer transitions 2/136 dead transitions. [2024-11-16 19:29:13,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 136 transitions, 771 flow [2024-11-16 19:29:13,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 19:29:13,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-16 19:29:13,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 235 transitions. [2024-11-16 19:29:13,324 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4417293233082707 [2024-11-16 19:29:13,324 INFO L175 Difference]: Start difference. First operand has 41 places, 47 transitions, 178 flow. Second operand 14 states and 235 transitions. [2024-11-16 19:29:13,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 136 transitions, 771 flow [2024-11-16 19:29:13,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 136 transitions, 771 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-16 19:29:13,335 INFO L231 Difference]: Finished difference. Result has 60 places, 75 transitions, 429 flow [2024-11-16 19:29:13,336 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=429, PETRI_PLACES=60, PETRI_TRANSITIONS=75} [2024-11-16 19:29:13,337 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 26 predicate places. [2024-11-16 19:29:13,338 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 75 transitions, 429 flow [2024-11-16 19:29:13,338 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:13,338 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:13,338 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:13,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-16 19:29:13,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:13,540 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:13,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:13,540 INFO L85 PathProgramCache]: Analyzing trace with hash 527563630, now seen corresponding path program 3 times [2024-11-16 19:29:13,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:13,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655238647] [2024-11-16 19:29:13,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:13,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:13,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:13,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:13,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655238647] [2024-11-16 19:29:13,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655238647] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:13,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:13,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:13,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188238924] [2024-11-16 19:29:13,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:13,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:13,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:13,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:13,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:13,639 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:29:13,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 75 transitions, 429 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:13,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:13,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:29:13,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:13,876 INFO L124 PetriNetUnfolderBase]: 416/820 cut-off events. [2024-11-16 19:29:13,876 INFO L125 PetriNetUnfolderBase]: For 1666/1698 co-relation queries the response was YES. [2024-11-16 19:29:13,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2856 conditions, 820 events. 416/820 cut-off events. For 1666/1698 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 4338 event pairs, 111 based on Foata normal form. 4/809 useless extension candidates. Maximal degree in co-relation 2841. Up to 325 conditions per place. [2024-11-16 19:29:13,884 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 80 selfloop transitions, 21 changer transitions 10/129 dead transitions. [2024-11-16 19:29:13,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 129 transitions, 980 flow [2024-11-16 19:29:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:29:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:29:13,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-11-16 19:29:13,889 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-16 19:29:13,889 INFO L175 Difference]: Start difference. First operand has 60 places, 75 transitions, 429 flow. Second operand 7 states and 133 transitions. [2024-11-16 19:29:13,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 129 transitions, 980 flow [2024-11-16 19:29:13,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 129 transitions, 946 flow, removed 17 selfloop flow, removed 0 redundant places. [2024-11-16 19:29:13,905 INFO L231 Difference]: Finished difference. Result has 71 places, 82 transitions, 545 flow [2024-11-16 19:29:13,908 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=407, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=545, PETRI_PLACES=71, PETRI_TRANSITIONS=82} [2024-11-16 19:29:13,909 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 37 predicate places. [2024-11-16 19:29:13,909 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 82 transitions, 545 flow [2024-11-16 19:29:13,910 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:13,910 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:13,910 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:13,910 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-16 19:29:13,910 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:13,910 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:13,910 INFO L85 PathProgramCache]: Analyzing trace with hash -668605480, now seen corresponding path program 4 times [2024-11-16 19:29:13,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:13,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401359299] [2024-11-16 19:29:13,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:13,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:13,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:14,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:14,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:14,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401359299] [2024-11-16 19:29:14,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401359299] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:14,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:14,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:29:14,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174943810] [2024-11-16 19:29:14,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:14,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:29:14,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:14,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:29:14,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:29:14,036 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:29:14,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 82 transitions, 545 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:14,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:14,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:29:14,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:14,199 INFO L124 PetriNetUnfolderBase]: 392/859 cut-off events. [2024-11-16 19:29:14,199 INFO L125 PetriNetUnfolderBase]: For 2611/2661 co-relation queries the response was YES. [2024-11-16 19:29:14,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3281 conditions, 859 events. 392/859 cut-off events. For 2611/2661 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 4925 event pairs, 121 based on Foata normal form. 23/842 useless extension candidates. Maximal degree in co-relation 3260. Up to 543 conditions per place. [2024-11-16 19:29:14,209 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 79 selfloop transitions, 6 changer transitions 3/110 dead transitions. [2024-11-16 19:29:14,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 110 transitions, 869 flow [2024-11-16 19:29:14,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:29:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:29:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 98 transitions. [2024-11-16 19:29:14,211 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5157894736842106 [2024-11-16 19:29:14,211 INFO L175 Difference]: Start difference. First operand has 71 places, 82 transitions, 545 flow. Second operand 5 states and 98 transitions. [2024-11-16 19:29:14,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 110 transitions, 869 flow [2024-11-16 19:29:14,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 110 transitions, 832 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-16 19:29:14,222 INFO L231 Difference]: Finished difference. Result has 74 places, 87 transitions, 559 flow [2024-11-16 19:29:14,223 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=559, PETRI_PLACES=74, PETRI_TRANSITIONS=87} [2024-11-16 19:29:14,223 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 40 predicate places. [2024-11-16 19:29:14,224 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 87 transitions, 559 flow [2024-11-16 19:29:14,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:14,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:14,224 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:14,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-16 19:29:14,225 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:14,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:14,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1539121956, now seen corresponding path program 1 times [2024-11-16 19:29:14,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:14,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897360607] [2024-11-16 19:29:14,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:14,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:14,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:14,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:14,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897360607] [2024-11-16 19:29:14,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897360607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:14,300 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:14,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:14,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334541150] [2024-11-16 19:29:14,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:14,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:14,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:14,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:14,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:14,310 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:29:14,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 559 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:14,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:14,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:29:14,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:14,545 INFO L124 PetriNetUnfolderBase]: 527/1037 cut-off events. [2024-11-16 19:29:14,545 INFO L125 PetriNetUnfolderBase]: For 2556/2597 co-relation queries the response was YES. [2024-11-16 19:29:14,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3888 conditions, 1037 events. 527/1037 cut-off events. For 2556/2597 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 5735 event pairs, 135 based on Foata normal form. 37/1051 useless extension candidates. Maximal degree in co-relation 3865. Up to 413 conditions per place. [2024-11-16 19:29:14,555 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 85 selfloop transitions, 15 changer transitions 15/129 dead transitions. [2024-11-16 19:29:14,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 129 transitions, 1016 flow [2024-11-16 19:29:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-16 19:29:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-16 19:29:14,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-11-16 19:29:14,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.518796992481203 [2024-11-16 19:29:14,556 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 559 flow. Second operand 7 states and 138 transitions. [2024-11-16 19:29:14,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 129 transitions, 1016 flow [2024-11-16 19:29:14,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 129 transitions, 1010 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-16 19:29:14,566 INFO L231 Difference]: Finished difference. Result has 82 places, 86 transitions, 592 flow [2024-11-16 19:29:14,567 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=556, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=592, PETRI_PLACES=82, PETRI_TRANSITIONS=86} [2024-11-16 19:29:14,567 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 48 predicate places. [2024-11-16 19:29:14,567 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 86 transitions, 592 flow [2024-11-16 19:29:14,568 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:14,568 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:14,568 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:14,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-16 19:29:14,568 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:14,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:14,569 INFO L85 PathProgramCache]: Analyzing trace with hash -289282816, now seen corresponding path program 2 times [2024-11-16 19:29:14,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:14,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326910173] [2024-11-16 19:29:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:14,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:14,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:14,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:14,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326910173] [2024-11-16 19:29:14,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326910173] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:14,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268296894] [2024-11-16 19:29:14,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:29:14,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:14,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:14,671 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) [2024-11-16 19:29:14,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-16 19:29:14,754 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:29:14,754 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:14,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:29:14,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:14,833 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:14,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268296894] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:14,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:14,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-16 19:29:14,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090833413] [2024-11-16 19:29:14,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:14,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:29:14,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:14,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:29:14,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:29:14,896 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:29:14,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 86 transitions, 592 flow. Second operand has 11 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:14,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:14,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:29:14,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:15,418 INFO L124 PetriNetUnfolderBase]: 844/1566 cut-off events. [2024-11-16 19:29:15,419 INFO L125 PetriNetUnfolderBase]: For 5178/5178 co-relation queries the response was YES. [2024-11-16 19:29:15,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6266 conditions, 1566 events. 844/1566 cut-off events. For 5178/5178 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8824 event pairs, 79 based on Foata normal form. 32/1592 useless extension candidates. Maximal degree in co-relation 6240. Up to 286 conditions per place. [2024-11-16 19:29:15,432 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 134 selfloop transitions, 90 changer transitions 2/234 dead transitions. [2024-11-16 19:29:15,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 234 transitions, 2079 flow [2024-11-16 19:29:15,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:29:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:29:15,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 293 transitions. [2024-11-16 19:29:15,434 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4535603715170279 [2024-11-16 19:29:15,435 INFO L175 Difference]: Start difference. First operand has 82 places, 86 transitions, 592 flow. Second operand 17 states and 293 transitions. [2024-11-16 19:29:15,435 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 234 transitions, 2079 flow [2024-11-16 19:29:15,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 234 transitions, 1996 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-11-16 19:29:15,452 INFO L231 Difference]: Finished difference. Result has 102 places, 152 transitions, 1462 flow [2024-11-16 19:29:15,453 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=564, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=1462, PETRI_PLACES=102, PETRI_TRANSITIONS=152} [2024-11-16 19:29:15,455 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 68 predicate places. [2024-11-16 19:29:15,456 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 152 transitions, 1462 flow [2024-11-16 19:29:15,456 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.090909090909092) internal successors, (133), 11 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:15,456 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:15,456 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:15,475 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-16 19:29:15,657 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,SelfDestructingSolverStorable7 [2024-11-16 19:29:15,657 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:15,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:15,658 INFO L85 PathProgramCache]: Analyzing trace with hash -283510546, now seen corresponding path program 3 times [2024-11-16 19:29:15,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:15,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168034045] [2024-11-16 19:29:15,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:15,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:15,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:15,736 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:15,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:15,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168034045] [2024-11-16 19:29:15,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168034045] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:15,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70659984] [2024-11-16 19:29:15,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:29:15,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:15,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:15,739 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) [2024-11-16 19:29:15,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-16 19:29:15,823 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:29:15,824 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:15,825 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:29:15,827 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:15,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:15,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:15,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:15,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70659984] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:15,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:15,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 9 [2024-11-16 19:29:15,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062980441] [2024-11-16 19:29:15,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:15,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-16 19:29:15,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:15,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-16 19:29:15,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-11-16 19:29:15,924 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:29:15,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 152 transitions, 1462 flow. Second operand has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:15,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:15,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:29:15,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:16,435 INFO L124 PetriNetUnfolderBase]: 830/1547 cut-off events. [2024-11-16 19:29:16,435 INFO L125 PetriNetUnfolderBase]: For 7726/7726 co-relation queries the response was YES. [2024-11-16 19:29:16,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6982 conditions, 1547 events. 830/1547 cut-off events. For 7726/7726 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8802 event pairs, 81 based on Foata normal form. 16/1557 useless extension candidates. Maximal degree in co-relation 6948. Up to 274 conditions per place. [2024-11-16 19:29:16,449 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 121 selfloop transitions, 101 changer transitions 2/232 dead transitions. [2024-11-16 19:29:16,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 232 transitions, 2365 flow [2024-11-16 19:29:16,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-16 19:29:16,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-16 19:29:16,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 229 transitions. [2024-11-16 19:29:16,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43045112781954886 [2024-11-16 19:29:16,451 INFO L175 Difference]: Start difference. First operand has 102 places, 152 transitions, 1462 flow. Second operand 14 states and 229 transitions. [2024-11-16 19:29:16,451 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 232 transitions, 2365 flow [2024-11-16 19:29:16,474 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 232 transitions, 2171 flow, removed 89 selfloop flow, removed 2 redundant places. [2024-11-16 19:29:16,479 INFO L231 Difference]: Finished difference. Result has 119 places, 171 transitions, 1718 flow [2024-11-16 19:29:16,480 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1718, PETRI_PLACES=119, PETRI_TRANSITIONS=171} [2024-11-16 19:29:16,481 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 85 predicate places. [2024-11-16 19:29:16,482 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 171 transitions, 1718 flow [2024-11-16 19:29:16,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.0) internal successors, (108), 9 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:16,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:16,482 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:16,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-16 19:29:16,686 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:16,687 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:16,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash 936159708, now seen corresponding path program 4 times [2024-11-16 19:29:16,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:16,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721951569] [2024-11-16 19:29:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:16,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:16,754 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:16,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:16,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721951569] [2024-11-16 19:29:16,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721951569] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:16,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:16,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:16,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323131816] [2024-11-16 19:29:16,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:16,756 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:16,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:16,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:16,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-16 19:29:16,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 171 transitions, 1718 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:16,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:16,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-16 19:29:16,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:17,139 INFO L124 PetriNetUnfolderBase]: 791/1525 cut-off events. [2024-11-16 19:29:17,139 INFO L125 PetriNetUnfolderBase]: For 8414/8430 co-relation queries the response was YES. [2024-11-16 19:29:17,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7239 conditions, 1525 events. 791/1525 cut-off events. For 8414/8430 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 9064 event pairs, 202 based on Foata normal form. 12/1517 useless extension candidates. Maximal degree in co-relation 7200. Up to 685 conditions per place. [2024-11-16 19:29:17,155 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 120 selfloop transitions, 54 changer transitions 3/208 dead transitions. [2024-11-16 19:29:17,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 208 transitions, 2319 flow [2024-11-16 19:29:17,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:29:17,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:29:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-11-16 19:29:17,157 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2024-11-16 19:29:17,157 INFO L175 Difference]: Start difference. First operand has 119 places, 171 transitions, 1718 flow. Second operand 6 states and 124 transitions. [2024-11-16 19:29:17,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 208 transitions, 2319 flow [2024-11-16 19:29:17,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 208 transitions, 2256 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-11-16 19:29:17,194 INFO L231 Difference]: Finished difference. Result has 123 places, 173 transitions, 1811 flow [2024-11-16 19:29:17,194 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1658, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1811, PETRI_PLACES=123, PETRI_TRANSITIONS=173} [2024-11-16 19:29:17,195 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 89 predicate places. [2024-11-16 19:29:17,195 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 173 transitions, 1811 flow [2024-11-16 19:29:17,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:17,195 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:17,195 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:17,195 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-16 19:29:17,195 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:17,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:17,196 INFO L85 PathProgramCache]: Analyzing trace with hash 34739396, now seen corresponding path program 5 times [2024-11-16 19:29:17,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:17,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642018012] [2024-11-16 19:29:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:17,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:17,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:17,286 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:17,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:17,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642018012] [2024-11-16 19:29:17,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642018012] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:17,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059252646] [2024-11-16 19:29:17,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:29:17,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:17,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:17,289 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) [2024-11-16 19:29:17,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-16 19:29:17,375 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:29:17,375 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:17,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-16 19:29:17,378 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-16 19:29:17,417 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-16 19:29:17,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059252646] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:17,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-16 19:29:17,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2024-11-16 19:29:17,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868497733] [2024-11-16 19:29:17,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:17,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:29:17,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:17,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:29:17,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-16 19:29:17,423 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:29:17,424 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 173 transitions, 1811 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:17,424 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:17,424 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:29:17,424 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:17,713 INFO L124 PetriNetUnfolderBase]: 609/1483 cut-off events. [2024-11-16 19:29:17,713 INFO L125 PetriNetUnfolderBase]: For 9614/9672 co-relation queries the response was YES. [2024-11-16 19:29:17,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7243 conditions, 1483 events. 609/1483 cut-off events. For 9614/9672 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 10430 event pairs, 261 based on Foata normal form. 60/1521 useless extension candidates. Maximal degree in co-relation 7204. Up to 857 conditions per place. [2024-11-16 19:29:17,727 INFO L140 encePairwiseOnDemand]: 32/38 looper letters, 116 selfloop transitions, 3 changer transitions 23/196 dead transitions. [2024-11-16 19:29:17,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 196 transitions, 2326 flow [2024-11-16 19:29:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:29:17,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:29:17,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-16 19:29:17,729 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4842105263157895 [2024-11-16 19:29:17,729 INFO L175 Difference]: Start difference. First operand has 123 places, 173 transitions, 1811 flow. Second operand 5 states and 92 transitions. [2024-11-16 19:29:17,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 196 transitions, 2326 flow [2024-11-16 19:29:17,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 196 transitions, 2202 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-16 19:29:17,769 INFO L231 Difference]: Finished difference. Result has 126 places, 173 transitions, 1725 flow [2024-11-16 19:29:17,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1706, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1725, PETRI_PLACES=126, PETRI_TRANSITIONS=173} [2024-11-16 19:29:17,770 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 92 predicate places. [2024-11-16 19:29:17,770 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 173 transitions, 1725 flow [2024-11-16 19:29:17,770 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:17,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:17,770 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:17,788 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-16 19:29:17,974 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:17,975 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:17,975 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:17,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1322009816, now seen corresponding path program 1 times [2024-11-16 19:29:17,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:17,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36808907] [2024-11-16 19:29:17,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:17,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:17,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:18,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:18,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36808907] [2024-11-16 19:29:18,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36808907] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:18,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844764494] [2024-11-16 19:29:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:18,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:18,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:18,094 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) [2024-11-16 19:29:18,095 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-16 19:29:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:18,180 INFO L255 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:29:18,181 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:18,238 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:18,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844764494] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:18,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:18,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-16 19:29:18,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338089086] [2024-11-16 19:29:18,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:18,280 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:29:18,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:18,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:29:18,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:29:18,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:29:18,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 173 transitions, 1725 flow. Second operand has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:18,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:18,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:29:18,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:18,765 INFO L124 PetriNetUnfolderBase]: 781/1476 cut-off events. [2024-11-16 19:29:18,765 INFO L125 PetriNetUnfolderBase]: For 7327/7327 co-relation queries the response was YES. [2024-11-16 19:29:18,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6780 conditions, 1476 events. 781/1476 cut-off events. For 7327/7327 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 8378 event pairs, 154 based on Foata normal form. 22/1496 useless extension candidates. Maximal degree in co-relation 6738. Up to 532 conditions per place. [2024-11-16 19:29:18,787 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 120 selfloop transitions, 84 changer transitions 3/215 dead transitions. [2024-11-16 19:29:18,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 215 transitions, 2333 flow [2024-11-16 19:29:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:29:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:29:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-11-16 19:29:18,788 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48830409356725146 [2024-11-16 19:29:18,788 INFO L175 Difference]: Start difference. First operand has 126 places, 173 transitions, 1725 flow. Second operand 9 states and 167 transitions. [2024-11-16 19:29:18,788 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 215 transitions, 2333 flow [2024-11-16 19:29:18,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 215 transitions, 2264 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-11-16 19:29:18,820 INFO L231 Difference]: Finished difference. Result has 128 places, 172 transitions, 1872 flow [2024-11-16 19:29:18,820 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1872, PETRI_PLACES=128, PETRI_TRANSITIONS=172} [2024-11-16 19:29:18,821 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 94 predicate places. [2024-11-16 19:29:18,821 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 172 transitions, 1872 flow [2024-11-16 19:29:18,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.454545454545455) internal successors, (137), 11 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:18,822 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:18,822 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:18,840 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-16 19:29:19,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-16 19:29:19,023 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:19,023 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:19,023 INFO L85 PathProgramCache]: Analyzing trace with hash -198797556, now seen corresponding path program 2 times [2024-11-16 19:29:19,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:19,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285912712] [2024-11-16 19:29:19,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:19,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:19,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:19,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:19,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285912712] [2024-11-16 19:29:19,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285912712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:19,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:19,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:19,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406469970] [2024-11-16 19:29:19,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:19,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:19,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:19,131 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-16 19:29:19,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 172 transitions, 1872 flow. Second operand has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:19,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:19,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-16 19:29:19,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:19,400 INFO L124 PetriNetUnfolderBase]: 648/1274 cut-off events. [2024-11-16 19:29:19,400 INFO L125 PetriNetUnfolderBase]: For 7995/8023 co-relation queries the response was YES. [2024-11-16 19:29:19,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6236 conditions, 1274 events. 648/1274 cut-off events. For 7995/8023 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 7216 event pairs, 189 based on Foata normal form. 20/1290 useless extension candidates. Maximal degree in co-relation 6195. Up to 710 conditions per place. [2024-11-16 19:29:19,415 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 126 selfloop transitions, 34 changer transitions 6/197 dead transitions. [2024-11-16 19:29:19,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 197 transitions, 2363 flow [2024-11-16 19:29:19,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:29:19,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:29:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 119 transitions. [2024-11-16 19:29:19,416 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5219298245614035 [2024-11-16 19:29:19,416 INFO L175 Difference]: Start difference. First operand has 128 places, 172 transitions, 1872 flow. Second operand 6 states and 119 transitions. [2024-11-16 19:29:19,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 197 transitions, 2363 flow [2024-11-16 19:29:19,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 197 transitions, 2262 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-11-16 19:29:19,480 INFO L231 Difference]: Finished difference. Result has 129 places, 168 transitions, 1797 flow [2024-11-16 19:29:19,480 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1797, PETRI_PLACES=129, PETRI_TRANSITIONS=168} [2024-11-16 19:29:19,481 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 95 predicate places. [2024-11-16 19:29:19,481 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 168 transitions, 1797 flow [2024-11-16 19:29:19,482 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:19,482 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:19,482 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:19,482 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-16 19:29:19,483 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:19,483 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:19,483 INFO L85 PathProgramCache]: Analyzing trace with hash 552024453, now seen corresponding path program 1 times [2024-11-16 19:29:19,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:19,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916655485] [2024-11-16 19:29:19,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:19,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:19,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:19,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:29:19,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:19,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916655485] [2024-11-16 19:29:19,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916655485] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:19,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:19,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-16 19:29:19,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484651805] [2024-11-16 19:29:19,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:19,564 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-16 19:29:19,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:19,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-16 19:29:19,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-16 19:29:19,574 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:29:19,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 168 transitions, 1797 flow. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:19,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:19,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:29:19,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:19,865 INFO L124 PetriNetUnfolderBase]: 763/1422 cut-off events. [2024-11-16 19:29:19,866 INFO L125 PetriNetUnfolderBase]: For 7829/7857 co-relation queries the response was YES. [2024-11-16 19:29:19,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6605 conditions, 1422 events. 763/1422 cut-off events. For 7829/7857 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 7853 event pairs, 171 based on Foata normal form. 27/1447 useless extension candidates. Maximal degree in co-relation 6565. Up to 590 conditions per place. [2024-11-16 19:29:19,880 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 148 selfloop transitions, 50 changer transitions 0/206 dead transitions. [2024-11-16 19:29:19,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 206 transitions, 2456 flow [2024-11-16 19:29:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:29:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:29:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-11-16 19:29:19,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4956140350877193 [2024-11-16 19:29:19,881 INFO L175 Difference]: Start difference. First operand has 129 places, 168 transitions, 1797 flow. Second operand 6 states and 113 transitions. [2024-11-16 19:29:19,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 206 transitions, 2456 flow [2024-11-16 19:29:19,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 206 transitions, 2261 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-11-16 19:29:19,914 INFO L231 Difference]: Finished difference. Result has 121 places, 174 transitions, 1806 flow [2024-11-16 19:29:19,915 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1614, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1806, PETRI_PLACES=121, PETRI_TRANSITIONS=174} [2024-11-16 19:29:19,916 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 87 predicate places. [2024-11-16 19:29:19,916 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 174 transitions, 1806 flow [2024-11-16 19:29:19,916 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:19,916 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:19,917 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:19,917 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-16 19:29:19,917 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:19,917 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:19,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1437774447, now seen corresponding path program 2 times [2024-11-16 19:29:19,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:19,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657271384] [2024-11-16 19:29:19,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:19,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:29:19,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:19,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657271384] [2024-11-16 19:29:19,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657271384] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:19,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:19,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-16 19:29:19,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591624259] [2024-11-16 19:29:19,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:19,999 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-16 19:29:20,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:20,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-16 19:29:20,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-16 19:29:20,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 38 [2024-11-16 19:29:20,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 174 transitions, 1806 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:20,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:20,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 38 [2024-11-16 19:29:20,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:20,262 INFO L124 PetriNetUnfolderBase]: 685/1305 cut-off events. [2024-11-16 19:29:20,262 INFO L125 PetriNetUnfolderBase]: For 6505/6547 co-relation queries the response was YES. [2024-11-16 19:29:20,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5918 conditions, 1305 events. 685/1305 cut-off events. For 6505/6547 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7110 event pairs, 209 based on Foata normal form. 8/1300 useless extension candidates. Maximal degree in co-relation 5885. Up to 705 conditions per place. [2024-11-16 19:29:20,276 INFO L140 encePairwiseOnDemand]: 31/38 looper letters, 123 selfloop transitions, 34 changer transitions 4/187 dead transitions. [2024-11-16 19:29:20,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 187 transitions, 2151 flow [2024-11-16 19:29:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-16 19:29:20,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-16 19:29:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2024-11-16 19:29:20,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4692982456140351 [2024-11-16 19:29:20,279 INFO L175 Difference]: Start difference. First operand has 121 places, 174 transitions, 1806 flow. Second operand 6 states and 107 transitions. [2024-11-16 19:29:20,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 187 transitions, 2151 flow [2024-11-16 19:29:20,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 187 transitions, 2069 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-16 19:29:20,304 INFO L231 Difference]: Finished difference. Result has 125 places, 169 transitions, 1734 flow [2024-11-16 19:29:20,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1680, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1734, PETRI_PLACES=125, PETRI_TRANSITIONS=169} [2024-11-16 19:29:20,306 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 91 predicate places. [2024-11-16 19:29:20,306 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 169 transitions, 1734 flow [2024-11-16 19:29:20,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:20,307 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:20,307 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:20,307 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-16 19:29:20,307 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:20,307 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:20,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1479161305, now seen corresponding path program 3 times [2024-11-16 19:29:20,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:20,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390370206] [2024-11-16 19:29:20,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:20,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:29:20,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:20,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390370206] [2024-11-16 19:29:20,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390370206] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:20,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031828497] [2024-11-16 19:29:20,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:29:20,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:20,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:20,397 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) [2024-11-16 19:29:20,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-16 19:29:20,485 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-16 19:29:20,486 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:20,488 INFO L255 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-16 19:29:20,489 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:20,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:29:20,532 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:20,564 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-16 19:29:20,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031828497] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:20,565 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:20,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2024-11-16 19:29:20,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083589119] [2024-11-16 19:29:20,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:20,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:29:20,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:20,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:29:20,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:29:20,586 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:29:20,587 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 169 transitions, 1734 flow. Second operand has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:20,587 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:20,587 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:29:20,587 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:20,984 INFO L124 PetriNetUnfolderBase]: 722/1328 cut-off events. [2024-11-16 19:29:20,984 INFO L125 PetriNetUnfolderBase]: For 6316/6316 co-relation queries the response was YES. [2024-11-16 19:29:20,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5942 conditions, 1328 events. 722/1328 cut-off events. For 6316/6316 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 7036 event pairs, 155 based on Foata normal form. 11/1337 useless extension candidates. Maximal degree in co-relation 5907. Up to 533 conditions per place. [2024-11-16 19:29:20,995 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 139 selfloop transitions, 65 changer transitions 2/214 dead transitions. [2024-11-16 19:29:20,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 214 transitions, 2396 flow [2024-11-16 19:29:20,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:29:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:29:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-11-16 19:29:20,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2024-11-16 19:29:20,997 INFO L175 Difference]: Start difference. First operand has 125 places, 169 transitions, 1734 flow. Second operand 9 states and 160 transitions. [2024-11-16 19:29:20,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 214 transitions, 2396 flow [2024-11-16 19:29:21,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 214 transitions, 2304 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-11-16 19:29:21,019 INFO L231 Difference]: Finished difference. Result has 127 places, 177 transitions, 1903 flow [2024-11-16 19:29:21,020 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1595, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1903, PETRI_PLACES=127, PETRI_TRANSITIONS=177} [2024-11-16 19:29:21,020 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 93 predicate places. [2024-11-16 19:29:21,020 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 177 transitions, 1903 flow [2024-11-16 19:29:21,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.909090909090908) internal successors, (131), 11 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:21,021 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:21,021 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:21,039 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-16 19:29:21,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-16 19:29:21,222 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:21,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:21,222 INFO L85 PathProgramCache]: Analyzing trace with hash -808536608, now seen corresponding path program 1 times [2024-11-16 19:29:21,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:21,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936900900] [2024-11-16 19:29:21,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:21,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:21,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:21,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:21,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:21,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936900900] [2024-11-16 19:29:21,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936900900] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-16 19:29:21,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-16 19:29:21,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-16 19:29:21,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488011689] [2024-11-16 19:29:21,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-16 19:29:21,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-16 19:29:21,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:21,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-16 19:29:21,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-16 19:29:21,331 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:29:21,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 177 transitions, 1903 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:21,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:21,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:29:21,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:21,514 INFO L124 PetriNetUnfolderBase]: 506/1082 cut-off events. [2024-11-16 19:29:21,514 INFO L125 PetriNetUnfolderBase]: For 6200/6252 co-relation queries the response was YES. [2024-11-16 19:29:21,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5242 conditions, 1082 events. 506/1082 cut-off events. For 6200/6252 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 6227 event pairs, 189 based on Foata normal form. 12/1081 useless extension candidates. Maximal degree in co-relation 5205. Up to 727 conditions per place. [2024-11-16 19:29:21,523 INFO L140 encePairwiseOnDemand]: 33/38 looper letters, 115 selfloop transitions, 2 changer transitions 16/190 dead transitions. [2024-11-16 19:29:21,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 190 transitions, 2281 flow [2024-11-16 19:29:21,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-16 19:29:21,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-16 19:29:21,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-11-16 19:29:21,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4789473684210526 [2024-11-16 19:29:21,525 INFO L175 Difference]: Start difference. First operand has 127 places, 177 transitions, 1903 flow. Second operand 5 states and 91 transitions. [2024-11-16 19:29:21,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 190 transitions, 2281 flow [2024-11-16 19:29:21,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 190 transitions, 2108 flow, removed 17 selfloop flow, removed 10 redundant places. [2024-11-16 19:29:21,548 INFO L231 Difference]: Finished difference. Result has 119 places, 174 transitions, 1730 flow [2024-11-16 19:29:21,548 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1730, PETRI_PLACES=119, PETRI_TRANSITIONS=174} [2024-11-16 19:29:21,549 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 85 predicate places. [2024-11-16 19:29:21,549 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 174 transitions, 1730 flow [2024-11-16 19:29:21,549 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:21,549 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:21,549 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:21,550 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-16 19:29:21,550 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:21,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:21,550 INFO L85 PathProgramCache]: Analyzing trace with hash 546090289, now seen corresponding path program 1 times [2024-11-16 19:29:21,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:21,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183512277] [2024-11-16 19:29:21,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:21,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:21,805 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:21,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:21,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183512277] [2024-11-16 19:29:21,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183512277] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:21,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391795337] [2024-11-16 19:29:21,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:21,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:21,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:21,808 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) [2024-11-16 19:29:21,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-16 19:29:21,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:21,902 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 19:29:21,906 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:21,993 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:21,993 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:22,033 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 36 treesize of output 12 [2024-11-16 19:29:22,097 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:22,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391795337] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:22,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:22,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 10 [2024-11-16 19:29:22,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190316420] [2024-11-16 19:29:22,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:22,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:29:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:22,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:29:22,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:29:22,102 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:29:22,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 174 transitions, 1730 flow. Second operand has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:22,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:22,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:29:22,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:22,649 INFO L124 PetriNetUnfolderBase]: 1495/2991 cut-off events. [2024-11-16 19:29:22,650 INFO L125 PetriNetUnfolderBase]: For 13359/13587 co-relation queries the response was YES. [2024-11-16 19:29:22,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13959 conditions, 2991 events. 1495/2991 cut-off events. For 13359/13587 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 20620 event pairs, 177 based on Foata normal form. 92/3057 useless extension candidates. Maximal degree in co-relation 13929. Up to 695 conditions per place. [2024-11-16 19:29:22,688 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 385 selfloop transitions, 15 changer transitions 18/475 dead transitions. [2024-11-16 19:29:22,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 475 transitions, 5807 flow [2024-11-16 19:29:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-16 19:29:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-16 19:29:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-11-16 19:29:22,690 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5105263157894737 [2024-11-16 19:29:22,690 INFO L175 Difference]: Start difference. First operand has 119 places, 174 transitions, 1730 flow. Second operand 10 states and 194 transitions. [2024-11-16 19:29:22,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 475 transitions, 5807 flow [2024-11-16 19:29:22,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 475 transitions, 5783 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-16 19:29:22,738 INFO L231 Difference]: Finished difference. Result has 125 places, 188 transitions, 1837 flow [2024-11-16 19:29:22,739 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1837, PETRI_PLACES=125, PETRI_TRANSITIONS=188} [2024-11-16 19:29:22,739 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 91 predicate places. [2024-11-16 19:29:22,739 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 188 transitions, 1837 flow [2024-11-16 19:29:22,740 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.090909090909092) internal successors, (155), 11 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:22,740 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:22,740 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:22,757 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-16 19:29:22,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:22,941 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:22,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:22,941 INFO L85 PathProgramCache]: Analyzing trace with hash -1530798789, now seen corresponding path program 2 times [2024-11-16 19:29:22,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:22,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548119796] [2024-11-16 19:29:22,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:22,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:23,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:23,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548119796] [2024-11-16 19:29:23,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548119796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:23,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952792975] [2024-11-16 19:29:23,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:29:23,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:23,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:23,158 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:23,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-16 19:29:23,245 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:29:23,252 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:23,254 INFO L255 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-16 19:29:23,256 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:23,340 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:23,373 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 36 treesize of output 12 [2024-11-16 19:29:23,451 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-16 19:29:23,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952792975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:23,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:23,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-11-16 19:29:23,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164968060] [2024-11-16 19:29:23,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:23,453 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:29:23,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:23,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:29:23,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:29:23,464 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 38 [2024-11-16 19:29:23,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 188 transitions, 1837 flow. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:23,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:23,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 38 [2024-11-16 19:29:23,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:24,450 INFO L124 PetriNetUnfolderBase]: 3808/7617 cut-off events. [2024-11-16 19:29:24,450 INFO L125 PetriNetUnfolderBase]: For 36381/37201 co-relation queries the response was YES. [2024-11-16 19:29:24,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37064 conditions, 7617 events. 3808/7617 cut-off events. For 36381/37201 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 61792 event pairs, 456 based on Foata normal form. 325/7873 useless extension candidates. Maximal degree in co-relation 37031. Up to 2096 conditions per place. [2024-11-16 19:29:24,520 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 396 selfloop transitions, 24 changer transitions 35/512 dead transitions. [2024-11-16 19:29:24,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 512 transitions, 6218 flow [2024-11-16 19:29:24,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-16 19:29:24,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-16 19:29:24,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-11-16 19:29:24,522 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5146198830409356 [2024-11-16 19:29:24,522 INFO L175 Difference]: Start difference. First operand has 125 places, 188 transitions, 1837 flow. Second operand 9 states and 176 transitions. [2024-11-16 19:29:24,522 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 512 transitions, 6218 flow [2024-11-16 19:29:24,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 512 transitions, 6172 flow, removed 22 selfloop flow, removed 1 redundant places. [2024-11-16 19:29:24,688 INFO L231 Difference]: Finished difference. Result has 138 places, 207 transitions, 2035 flow [2024-11-16 19:29:24,689 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=1819, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2035, PETRI_PLACES=138, PETRI_TRANSITIONS=207} [2024-11-16 19:29:24,690 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 104 predicate places. [2024-11-16 19:29:24,690 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 207 transitions, 2035 flow [2024-11-16 19:29:24,690 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:24,690 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:24,690 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:24,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-16 19:29:24,891 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:24,891 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:24,892 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:24,892 INFO L85 PathProgramCache]: Analyzing trace with hash -2097019134, now seen corresponding path program 3 times [2024-11-16 19:29:24,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:24,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914832376] [2024-11-16 19:29:24,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:24,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:25,021 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:25,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:25,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914832376] [2024-11-16 19:29:25,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914832376] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:25,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108796918] [2024-11-16 19:29:25,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-16 19:29:25,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:25,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:25,024 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:25,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-16 19:29:25,135 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-16 19:29:25,135 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:25,137 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:25,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:25,242 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:25,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108796918] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:25,312 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:25,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2024-11-16 19:29:25,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100147672] [2024-11-16 19:29:25,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:25,313 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-16 19:29:25,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:25,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-16 19:29:25,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2024-11-16 19:29:25,332 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:29:25,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 207 transitions, 2035 flow. Second operand has 15 states, 15 states have (on average 12.733333333333333) internal successors, (191), 15 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:25,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:25,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:29:25,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:27,577 INFO L124 PetriNetUnfolderBase]: 7184/12866 cut-off events. [2024-11-16 19:29:27,577 INFO L125 PetriNetUnfolderBase]: For 59734/59734 co-relation queries the response was YES. [2024-11-16 19:29:27,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61126 conditions, 12866 events. 7184/12866 cut-off events. For 59734/59734 co-relation queries the response was YES. Maximal size of possible extension queue 653. Compared 99465 event pairs, 322 based on Foata normal form. 308/13174 useless extension candidates. Maximal degree in co-relation 61086. Up to 2571 conditions per place. [2024-11-16 19:29:27,702 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 428 selfloop transitions, 190 changer transitions 12/639 dead transitions. [2024-11-16 19:29:27,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 639 transitions, 6768 flow [2024-11-16 19:29:27,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-16 19:29:27,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2024-11-16 19:29:27,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 500 transitions. [2024-11-16 19:29:27,704 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43859649122807015 [2024-11-16 19:29:27,704 INFO L175 Difference]: Start difference. First operand has 138 places, 207 transitions, 2035 flow. Second operand 30 states and 500 transitions. [2024-11-16 19:29:27,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 639 transitions, 6768 flow [2024-11-16 19:29:27,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 639 transitions, 6715 flow, removed 25 selfloop flow, removed 1 redundant places. [2024-11-16 19:29:28,005 INFO L231 Difference]: Finished difference. Result has 186 places, 312 transitions, 3814 flow [2024-11-16 19:29:28,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=3814, PETRI_PLACES=186, PETRI_TRANSITIONS=312} [2024-11-16 19:29:28,006 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 152 predicate places. [2024-11-16 19:29:28,006 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 312 transitions, 3814 flow [2024-11-16 19:29:28,006 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 12.733333333333333) internal successors, (191), 15 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:28,007 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:28,007 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:28,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-16 19:29:28,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:28,207 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:28,208 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:28,208 INFO L85 PathProgramCache]: Analyzing trace with hash -1857850126, now seen corresponding path program 4 times [2024-11-16 19:29:28,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:28,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219389676] [2024-11-16 19:29:28,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:28,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:28,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:28,438 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:28,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:28,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219389676] [2024-11-16 19:29:28,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219389676] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:28,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139260239] [2024-11-16 19:29:28,439 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-16 19:29:28,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:28,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:28,441 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:28,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-16 19:29:28,529 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-16 19:29:28,529 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:28,530 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:28,531 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:28,594 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:28,651 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:28,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139260239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:28,652 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:28,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-16 19:29:28,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493341829] [2024-11-16 19:29:28,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:28,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:29:28,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:28,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:29:28,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:29:28,664 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:29:28,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 312 transitions, 3814 flow. Second operand has 11 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:28,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:28,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:29:28,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:31,697 INFO L124 PetriNetUnfolderBase]: 10078/17986 cut-off events. [2024-11-16 19:29:31,698 INFO L125 PetriNetUnfolderBase]: For 183480/183480 co-relation queries the response was YES. [2024-11-16 19:29:31,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103555 conditions, 17986 events. 10078/17986 cut-off events. For 183480/183480 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 144944 event pairs, 601 based on Foata normal form. 109/18095 useless extension candidates. Maximal degree in co-relation 103495. Up to 3649 conditions per place. [2024-11-16 19:29:31,901 INFO L140 encePairwiseOnDemand]: 30/38 looper letters, 322 selfloop transitions, 253 changer transitions 9/593 dead transitions. [2024-11-16 19:29:31,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 593 transitions, 7851 flow [2024-11-16 19:29:31,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 19:29:31,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-16 19:29:31,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 253 transitions. [2024-11-16 19:29:31,902 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.443859649122807 [2024-11-16 19:29:31,902 INFO L175 Difference]: Start difference. First operand has 186 places, 312 transitions, 3814 flow. Second operand 15 states and 253 transitions. [2024-11-16 19:29:31,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 593 transitions, 7851 flow [2024-11-16 19:29:33,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 593 transitions, 7554 flow, removed 141 selfloop flow, removed 2 redundant places. [2024-11-16 19:29:33,608 INFO L231 Difference]: Finished difference. Result has 205 places, 408 transitions, 5663 flow [2024-11-16 19:29:33,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=3645, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5663, PETRI_PLACES=205, PETRI_TRANSITIONS=408} [2024-11-16 19:29:33,609 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 171 predicate places. [2024-11-16 19:29:33,609 INFO L471 AbstractCegarLoop]: Abstraction has has 205 places, 408 transitions, 5663 flow [2024-11-16 19:29:33,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.818181818181818) internal successors, (141), 11 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:33,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:33,609 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:33,622 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-16 19:29:33,810 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-16 19:29:33,810 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:33,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:33,811 INFO L85 PathProgramCache]: Analyzing trace with hash 459584452, now seen corresponding path program 5 times [2024-11-16 19:29:33,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:33,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340394954] [2024-11-16 19:29:33,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:33,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:33,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:33,943 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:33,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:33,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340394954] [2024-11-16 19:29:33,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340394954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:33,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861113745] [2024-11-16 19:29:33,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-16 19:29:33,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:33,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:33,946 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:33,948 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-16 19:29:34,055 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-16 19:29:34,055 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:34,057 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:34,059 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:34,133 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:34,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:34,190 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:34,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861113745] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:34,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:34,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-16 19:29:34,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113724039] [2024-11-16 19:29:34,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:34,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:29:34,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:34,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:29:34,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:29:34,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:29:34,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 408 transitions, 5663 flow. Second operand has 13 states, 13 states have (on average 12.538461538461538) internal successors, (163), 13 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:34,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:34,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:29:34,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:39,673 INFO L124 PetriNetUnfolderBase]: 13344/23824 cut-off events. [2024-11-16 19:29:39,673 INFO L125 PetriNetUnfolderBase]: For 314887/314887 co-relation queries the response was YES. [2024-11-16 19:29:39,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 146129 conditions, 23824 events. 13344/23824 cut-off events. For 314887/314887 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 197170 event pairs, 668 based on Foata normal form. 238/24062 useless extension candidates. Maximal degree in co-relation 146062. Up to 4486 conditions per place. [2024-11-16 19:29:39,938 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 357 selfloop transitions, 364 changer transitions 10/740 dead transitions. [2024-11-16 19:29:39,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 740 transitions, 10696 flow [2024-11-16 19:29:39,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-16 19:29:39,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-16 19:29:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 290 transitions. [2024-11-16 19:29:39,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44891640866873067 [2024-11-16 19:29:39,940 INFO L175 Difference]: Start difference. First operand has 205 places, 408 transitions, 5663 flow. Second operand 17 states and 290 transitions. [2024-11-16 19:29:39,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 740 transitions, 10696 flow [2024-11-16 19:29:42,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 740 transitions, 10609 flow, removed 23 selfloop flow, removed 1 redundant places. [2024-11-16 19:29:42,936 INFO L231 Difference]: Finished difference. Result has 231 places, 528 transitions, 8738 flow [2024-11-16 19:29:42,937 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=5596, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=244, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=8738, PETRI_PLACES=231, PETRI_TRANSITIONS=528} [2024-11-16 19:29:42,937 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 197 predicate places. [2024-11-16 19:29:42,937 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 528 transitions, 8738 flow [2024-11-16 19:29:42,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.538461538461538) internal successors, (163), 13 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:42,937 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:42,938 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:42,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-16 19:29:43,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-16 19:29:43,142 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:43,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:43,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1462554582, now seen corresponding path program 6 times [2024-11-16 19:29:43,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:43,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486868122] [2024-11-16 19:29:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:43,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:43,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:43,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486868122] [2024-11-16 19:29:43,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486868122] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:43,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101119953] [2024-11-16 19:29:43,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-16 19:29:43,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:43,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:43,268 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:43,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-16 19:29:43,379 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-16 19:29:43,380 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:29:43,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:43,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:43,449 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:43,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:43,496 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:43,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101119953] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:43,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:43,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2024-11-16 19:29:43,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541563165] [2024-11-16 19:29:43,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:43,498 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-16 19:29:43,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:43,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-16 19:29:43,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2024-11-16 19:29:43,514 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:29:43,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 528 transitions, 8738 flow. Second operand has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 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) [2024-11-16 19:29:43,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:43,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:29:43,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:29:49,259 INFO L124 PetriNetUnfolderBase]: 14297/25413 cut-off events. [2024-11-16 19:29:49,259 INFO L125 PetriNetUnfolderBase]: For 481661/481661 co-relation queries the response was YES. [2024-11-16 19:29:49,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177824 conditions, 25413 events. 14297/25413 cut-off events. For 481661/481661 co-relation queries the response was YES. Maximal size of possible extension queue 1058. Compared 212767 event pairs, 3898 based on Foata normal form. 15/25422 useless extension candidates. Maximal degree in co-relation 177746. Up to 15854 conditions per place. [2024-11-16 19:29:49,612 INFO L140 encePairwiseOnDemand]: 29/38 looper letters, 586 selfloop transitions, 119 changer transitions 44/758 dead transitions. [2024-11-16 19:29:49,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 758 transitions, 13030 flow [2024-11-16 19:29:49,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-16 19:29:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-16 19:29:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 247 transitions. [2024-11-16 19:29:49,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-11-16 19:29:49,613 INFO L175 Difference]: Start difference. First operand has 231 places, 528 transitions, 8738 flow. Second operand 15 states and 247 transitions. [2024-11-16 19:29:49,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 758 transitions, 13030 flow [2024-11-16 19:29:55,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 758 transitions, 12852 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-11-16 19:29:55,429 INFO L231 Difference]: Finished difference. Result has 249 places, 568 transitions, 9684 flow [2024-11-16 19:29:55,429 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=8573, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=528, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=9684, PETRI_PLACES=249, PETRI_TRANSITIONS=568} [2024-11-16 19:29:55,430 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 215 predicate places. [2024-11-16 19:29:55,430 INFO L471 AbstractCegarLoop]: Abstraction has has 249 places, 568 transitions, 9684 flow [2024-11-16 19:29:55,430 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.636363636363637) internal successors, (139), 11 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) [2024-11-16 19:29:55,430 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:29:55,430 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:29:55,442 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-16 19:29:55,630 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-16 19:29:55,631 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:29:55,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:29:55,631 INFO L85 PathProgramCache]: Analyzing trace with hash -270942402, now seen corresponding path program 7 times [2024-11-16 19:29:55,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:29:55,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789204794] [2024-11-16 19:29:55,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:29:55,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:29:55,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:55,781 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:55,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:29:55,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789204794] [2024-11-16 19:29:55,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789204794] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:29:55,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376258367] [2024-11-16 19:29:55,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-16 19:29:55,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:29:55,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:29:55,784 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:29:55,786 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-16 19:29:55,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:29:55,890 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:29:55,892 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:29:55,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:55,979 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:29:56,028 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:29:56,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376258367] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:29:56,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:29:56,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2024-11-16 19:29:56,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240064626] [2024-11-16 19:29:56,029 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:29:56,029 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-16 19:29:56,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:29:56,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-16 19:29:56,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-11-16 19:29:56,058 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:29:56,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 568 transitions, 9684 flow. Second operand has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:29:56,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:29:56,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:29:56,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:03,390 INFO L124 PetriNetUnfolderBase]: 17925/31501 cut-off events. [2024-11-16 19:30:03,390 INFO L125 PetriNetUnfolderBase]: For 685849/685861 co-relation queries the response was YES. [2024-11-16 19:30:03,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 232138 conditions, 31501 events. 17925/31501 cut-off events. For 685849/685861 co-relation queries the response was YES. Maximal size of possible extension queue 1351. Compared 269939 event pairs, 2895 based on Foata normal form. 202/31697 useless extension candidates. Maximal degree in co-relation 232052. Up to 12618 conditions per place. [2024-11-16 19:30:03,903 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 745 selfloop transitions, 268 changer transitions 10/1032 dead transitions. [2024-11-16 19:30:03,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 1032 transitions, 17498 flow [2024-11-16 19:30:03,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-16 19:30:03,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-16 19:30:03,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 400 transitions. [2024-11-16 19:30:03,905 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4576659038901602 [2024-11-16 19:30:03,905 INFO L175 Difference]: Start difference. First operand has 249 places, 568 transitions, 9684 flow. Second operand 23 states and 400 transitions. [2024-11-16 19:30:03,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 1032 transitions, 17498 flow [2024-11-16 19:30:14,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 1032 transitions, 16834 flow, removed 248 selfloop flow, removed 6 redundant places. [2024-11-16 19:30:14,853 INFO L231 Difference]: Finished difference. Result has 275 places, 678 transitions, 12398 flow [2024-11-16 19:30:14,854 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=9351, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=567, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=12398, PETRI_PLACES=275, PETRI_TRANSITIONS=678} [2024-11-16 19:30:14,854 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 241 predicate places. [2024-11-16 19:30:14,854 INFO L471 AbstractCegarLoop]: Abstraction has has 275 places, 678 transitions, 12398 flow [2024-11-16 19:30:14,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.75) internal successors, (153), 12 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:30:14,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:14,855 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:30:14,867 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-16 19:30:15,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-11-16 19:30:15,055 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2024-11-16 19:30:15,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-16 19:30:15,056 INFO L85 PathProgramCache]: Analyzing trace with hash 1281162134, now seen corresponding path program 8 times [2024-11-16 19:30:15,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-16 19:30:15,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373630361] [2024-11-16 19:30:15,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-16 19:30:15,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-16 19:30:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-16 19:30:15,154 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:30:15,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-16 19:30:15,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373630361] [2024-11-16 19:30:15,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373630361] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-16 19:30:15,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174560468] [2024-11-16 19:30:15,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-16 19:30:15,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-16 19:30:15,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-16 19:30:15,157 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-16 19:30:15,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-16 19:30:15,259 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-16 19:30:15,259 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-16 19:30:15,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-16 19:30:15,262 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-16 19:30:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:30:15,323 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-16 19:30:15,367 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-16 19:30:15,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174560468] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-16 19:30:15,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-16 19:30:15,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2024-11-16 19:30:15,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091681479] [2024-11-16 19:30:15,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-16 19:30:15,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-16 19:30:15,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-16 19:30:15,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-16 19:30:15,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2024-11-16 19:30:15,385 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 38 [2024-11-16 19:30:15,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 678 transitions, 12398 flow. Second operand has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:30:15,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-16 19:30:15,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 38 [2024-11-16 19:30:15,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-16 19:30:23,280 INFO L124 PetriNetUnfolderBase]: 18162/32052 cut-off events. [2024-11-16 19:30:23,280 INFO L125 PetriNetUnfolderBase]: For 750771/750771 co-relation queries the response was YES. [2024-11-16 19:30:23,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245892 conditions, 32052 events. 18162/32052 cut-off events. For 750771/750771 co-relation queries the response was YES. Maximal size of possible extension queue 1387. Compared 276730 event pairs, 4860 based on Foata normal form. 58/32104 useless extension candidates. Maximal degree in co-relation 245797. Up to 20149 conditions per place. [2024-11-16 19:30:23,768 INFO L140 encePairwiseOnDemand]: 28/38 looper letters, 713 selfloop transitions, 205 changer transitions 62/989 dead transitions. [2024-11-16 19:30:23,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 989 transitions, 17697 flow [2024-11-16 19:30:23,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-16 19:30:23,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-16 19:30:23,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 360 transitions. [2024-11-16 19:30:23,770 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41189931350114417 [2024-11-16 19:30:23,770 INFO L175 Difference]: Start difference. First operand has 275 places, 678 transitions, 12398 flow. Second operand 23 states and 360 transitions. [2024-11-16 19:30:23,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 989 transitions, 17697 flow [2024-11-16 19:30:33,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 290 places, 989 transitions, 17221 flow, removed 142 selfloop flow, removed 7 redundant places. [2024-11-16 19:30:33,944 INFO L231 Difference]: Finished difference. Result has 305 places, 699 transitions, 13067 flow [2024-11-16 19:30:33,945 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=38, PETRI_DIFFERENCE_MINUEND_FLOW=12024, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=678, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=13067, PETRI_PLACES=305, PETRI_TRANSITIONS=699} [2024-11-16 19:30:33,945 INFO L277 CegarLoopForPetriNet]: 34 programPoint places, 271 predicate places. [2024-11-16 19:30:33,945 INFO L471 AbstractCegarLoop]: Abstraction has has 305 places, 699 transitions, 13067 flow [2024-11-16 19:30:33,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.23076923076923) internal successors, (159), 13 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-16 19:30:33,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-16 19:30:33,946 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-16 19:30:33,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0