./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 273a578a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --traceabstraction.positions.where.we.compute.the.hoare.annotation All --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.owicki-witnesses-273a578-m [2024-02-19 14:08:58,973 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-02-19 14:08:59,028 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-02-19 14:08:59,033 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-02-19 14:08:59,033 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-02-19 14:08:59,066 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-02-19 14:08:59,069 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-02-19 14:08:59,069 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-02-19 14:08:59,070 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-02-19 14:08:59,071 INFO L153 SettingsManager]: * Use memory slicer=true [2024-02-19 14:08:59,071 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-02-19 14:08:59,071 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-02-19 14:08:59,072 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-02-19 14:08:59,073 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-02-19 14:08:59,073 INFO L153 SettingsManager]: * Use SBE=true [2024-02-19 14:08:59,073 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-02-19 14:08:59,074 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-02-19 14:08:59,076 INFO L153 SettingsManager]: * sizeof long=4 [2024-02-19 14:08:59,076 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-02-19 14:08:59,077 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-02-19 14:08:59,077 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-02-19 14:08:59,077 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-02-19 14:08:59,077 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-02-19 14:08:59,077 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-02-19 14:08:59,078 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-02-19 14:08:59,078 INFO L153 SettingsManager]: * sizeof long double=12 [2024-02-19 14:08:59,078 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-02-19 14:08:59,078 INFO L153 SettingsManager]: * Use constant arrays=true [2024-02-19 14:08:59,078 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-02-19 14:08:59,079 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-02-19 14:08:59,079 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-02-19 14:08:59,080 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-02-19 14:08:59,080 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:08:59,080 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-02-19 14:08:59,080 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-02-19 14:08:59,081 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-02-19 14:08:59,081 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-02-19 14:08:59,081 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-02-19 14:08:59,081 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-02-19 14:08:59,081 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-02-19 14:08:59,082 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-02-19 14:08:59,082 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-02-19 14:08:59,082 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-02-19 14:08:59,082 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All [2024-02-19 14:08:59,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-02-19 14:08:59,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-02-19 14:08:59,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-02-19 14:08:59,348 INFO L270 PluginConnector]: Initializing CDTParser... [2024-02-19 14:08:59,348 INFO L274 PluginConnector]: CDTParser initialized [2024-02-19 14:08:59,349 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-ext/14_spin2003.i [2024-02-19 14:09:00,399 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-02-19 14:09:00,626 INFO L384 CDTParser]: Found 1 translation units. [2024-02-19 14:09:00,627 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i [2024-02-19 14:09:00,640 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dfec027b/4e724ebae6694b04aaeb7ff62cbc3b01/FLAG38189f367 [2024-02-19 14:09:00,654 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8dfec027b/4e724ebae6694b04aaeb7ff62cbc3b01 [2024-02-19 14:09:00,656 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-02-19 14:09:00,658 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-02-19 14:09:00,659 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-02-19 14:09:00,659 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-02-19 14:09:00,663 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-02-19 14:09:00,664 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:09:00" (1/1) ... [2024-02-19 14:09:00,664 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2577da0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:00, skipping insertion in model container [2024-02-19 14:09:00,665 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 02:09:00" (1/1) ... [2024-02-19 14:09:00,702 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-02-19 14:09:00,985 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i[30203,30216] [2024-02-19 14:09:00,992 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:09:01,000 INFO L202 MainTranslator]: Completed pre-run [2024-02-19 14:09:01,045 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-ext/14_spin2003.i[30203,30216] [2024-02-19 14:09:01,047 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-02-19 14:09:01,077 INFO L206 MainTranslator]: Completed translation [2024-02-19 14:09:01,078 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01 WrapperNode [2024-02-19 14:09:01,078 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-02-19 14:09:01,079 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-02-19 14:09:01,079 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-02-19 14:09:01,079 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-02-19 14:09:01,084 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,102 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,120 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 44 [2024-02-19 14:09:01,120 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-02-19 14:09:01,121 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-02-19 14:09:01,121 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-02-19 14:09:01,121 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-02-19 14:09:01,129 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,140 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,156 INFO L175 MemorySlicer]: Split 3 memory accesses to 2 slices as follows [2, 1]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-02-19 14:09:01,156 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,156 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,170 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,171 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,171 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,173 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-02-19 14:09:01,173 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-02-19 14:09:01,173 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-02-19 14:09:01,173 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-02-19 14:09:01,174 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (1/1) ... [2024-02-19 14:09:01,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-02-19 14:09:01,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-02-19 14:09:01,201 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) [2024-02-19 14:09:01,207 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 [2024-02-19 14:09:01,235 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2024-02-19 14:09:01,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2024-02-19 14:09:01,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-02-19 14:09:01,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-02-19 14:09:01,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-02-19 14:09:01,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-02-19 14:09:01,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-02-19 14:09:01,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-02-19 14:09:01,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-02-19 14:09:01,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-02-19 14:09:01,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-02-19 14:09:01,238 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-02-19 14:09:01,355 INFO L244 CfgBuilder]: Building ICFG [2024-02-19 14:09:01,357 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-02-19 14:09:01,492 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-02-19 14:09:01,493 INFO L293 CfgBuilder]: Performing block encoding [2024-02-19 14:09:01,575 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-02-19 14:09:01,575 INFO L320 CfgBuilder]: Removed 1 assume(true) statements. [2024-02-19 14:09:01,576 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:09:01 BoogieIcfgContainer [2024-02-19 14:09:01,576 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-02-19 14:09:01,578 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-02-19 14:09:01,578 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-02-19 14:09:01,581 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-02-19 14:09:01,581 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 02:09:00" (1/3) ... [2024-02-19 14:09:01,582 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ae48ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:09:01, skipping insertion in model container [2024-02-19 14:09:01,582 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 02:09:01" (2/3) ... [2024-02-19 14:09:01,584 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31ae48ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 02:09:01, skipping insertion in model container [2024-02-19 14:09:01,584 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 02:09:01" (3/3) ... [2024-02-19 14:09:01,585 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2024-02-19 14:09:01,599 INFO L221 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-02-19 14:09:01,599 INFO L180 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-02-19 14:09:01,600 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-02-19 14:09:01,624 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:09:01,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 16 places, 14 transitions, 32 flow [2024-02-19 14:09:01,681 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2024-02-19 14:09:01,681 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:09:01,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20 conditions, 16 events. 1/16 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 14 event pairs, 0 based on Foata normal form. 0/12 useless extension candidates. Maximal degree in co-relation 11. Up to 2 conditions per place. [2024-02-19 14:09:01,685 INFO L82 GeneralOperation]: Start removeDead. Operand has 16 places, 14 transitions, 32 flow [2024-02-19 14:09:01,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 16 places, 14 transitions, 32 flow [2024-02-19 14:09:01,697 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:09:01,703 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5ed50ba8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:09:01,703 INFO L370 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-02-19 14:09:01,714 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:09:01,714 INFO L124 PetriNetUnfolderBase]: 0/8 cut-off events. [2024-02-19 14:09:01,714 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-02-19 14:09:01,715 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:09:01,715 INFO L234 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-02-19 14:09:01,716 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-02-19 14:09:01,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:09:01,722 INFO L85 PathProgramCache]: Analyzing trace with hash 151627713, now seen corresponding path program 1 times [2024-02-19 14:09:01,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:09:01,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904068751] [2024-02-19 14:09:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:09:01,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:09:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:01,828 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:09:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:01,858 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:09:01,859 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:09:01,860 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2024-02-19 14:09:01,862 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-02-19 14:09:01,863 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2024-02-19 14:09:01,863 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-02-19 14:09:01,864 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-19 14:09:01,868 WARN L345 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:09:01,868 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-02-19 14:09:01,880 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:09:01,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 27 places, 24 transitions, 58 flow [2024-02-19 14:09:01,894 INFO L124 PetriNetUnfolderBase]: 2/28 cut-off events. [2024-02-19 14:09:01,894 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:09:01,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 28 events. 2/28 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 57 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 20. Up to 3 conditions per place. [2024-02-19 14:09:01,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 24 transitions, 58 flow [2024-02-19 14:09:01,897 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 58 flow [2024-02-19 14:09:01,898 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:09:01,899 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5ed50ba8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:09:01,899 INFO L370 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-02-19 14:09:01,904 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:09:01,904 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2024-02-19 14:09:01,904 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-02-19 14:09:01,904 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:09:01,904 INFO L234 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1] [2024-02-19 14:09:01,906 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2024-02-19 14:09:01,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:09:01,907 INFO L85 PathProgramCache]: Analyzing trace with hash 228925222, now seen corresponding path program 1 times [2024-02-19 14:09:01,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:09:01,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831047199] [2024-02-19 14:09:01,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:09:01,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:09:01,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:01,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:09:01,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:01,955 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:09:01,955 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:09:01,956 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2024-02-19 14:09:01,956 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2024-02-19 14:09:01,956 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2024-02-19 14:09:01,956 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2024-02-19 14:09:01,957 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-02-19 14:09:01,957 INFO L457 BasicCegarLoop]: Path program histogram: [1] [2024-02-19 14:09:01,960 WARN L345 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:09:01,961 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-02-19 14:09:01,975 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:09:01,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 34 transitions, 86 flow [2024-02-19 14:09:02,002 INFO L124 PetriNetUnfolderBase]: 3/40 cut-off events. [2024-02-19 14:09:02,003 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-19 14:09:02,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53 conditions, 40 events. 3/40 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 101 event pairs, 0 based on Foata normal form. 0/30 useless extension candidates. Maximal degree in co-relation 34. Up to 4 conditions per place. [2024-02-19 14:09:02,003 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 34 transitions, 86 flow [2024-02-19 14:09:02,004 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 86 flow [2024-02-19 14:09:02,005 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:09:02,009 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5ed50ba8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:09:02,009 INFO L370 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2024-02-19 14:09:02,017 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:09:02,017 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-02-19 14:09:02,017 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-02-19 14:09:02,018 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:09:02,018 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:09:02,019 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-19 14:09:02,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:09:02,019 INFO L85 PathProgramCache]: Analyzing trace with hash -978893811, now seen corresponding path program 1 times [2024-02-19 14:09:02,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:09:02,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422558328] [2024-02-19 14:09:02,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:09:02,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:09:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:09:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:09:02,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:09:02,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422558328] [2024-02-19 14:09:02,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1422558328] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:09:02,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:09:02,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:09:02,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397073930] [2024-02-19 14:09:02,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:09:02,148 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:09:02,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:09:02,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:09:02,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:09:02,189 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 34 [2024-02-19 14:09:02,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:09:02,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:09:02,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 34 [2024-02-19 14:09:02,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:09:02,352 INFO L124 PetriNetUnfolderBase]: 564/973 cut-off events. [2024-02-19 14:09:02,353 INFO L125 PetriNetUnfolderBase]: For 197/197 co-relation queries the response was YES. [2024-02-19 14:09:02,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1971 conditions, 973 events. 564/973 cut-off events. For 197/197 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4946 event pairs, 564 based on Foata normal form. 172/1132 useless extension candidates. Maximal degree in co-relation 425. Up to 876 conditions per place. [2024-02-19 14:09:02,360 INFO L140 encePairwiseOnDemand]: 29/34 looper letters, 16 selfloop transitions, 1 changer transitions 0/24 dead transitions. [2024-02-19 14:09:02,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 24 transitions, 100 flow [2024-02-19 14:09:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:09:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:09:02,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 51 transitions. [2024-02-19 14:09:02,371 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-19 14:09:02,374 INFO L308 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-02-19 14:09:02,375 INFO L507 AbstractCegarLoop]: Abstraction has has 33 places, 24 transitions, 100 flow [2024-02-19 14:09:02,375 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:09:02,375 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:09:02,375 INFO L234 CegarLoopForPetriNet]: trace histogram [4, 1, 1, 1, 1, 1] [2024-02-19 14:09:02,375 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-02-19 14:09:02,380 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2024-02-19 14:09:02,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:09:02,381 INFO L85 PathProgramCache]: Analyzing trace with hash -721975960, now seen corresponding path program 1 times [2024-02-19 14:09:02,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:09:02,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755925676] [2024-02-19 14:09:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:09:02,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:09:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:02,411 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:09:02,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:02,425 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:09:02,425 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:09:02,426 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2024-02-19 14:09:02,426 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2024-02-19 14:09:02,426 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2024-02-19 14:09:02,426 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2024-02-19 14:09:02,426 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2024-02-19 14:09:02,427 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-02-19 14:09:02,427 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-19 14:09:02,427 WARN L345 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:09:02,427 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-02-19 14:09:02,439 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:09:02,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 49 places, 44 transitions, 116 flow [2024-02-19 14:09:02,448 INFO L124 PetriNetUnfolderBase]: 4/52 cut-off events. [2024-02-19 14:09:02,448 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-02-19 14:09:02,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 52 events. 4/52 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 138 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 51. Up to 5 conditions per place. [2024-02-19 14:09:02,449 INFO L82 GeneralOperation]: Start removeDead. Operand has 49 places, 44 transitions, 116 flow [2024-02-19 14:09:02,449 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 49 places, 44 transitions, 116 flow [2024-02-19 14:09:02,450 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:09:02,451 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5ed50ba8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:09:02,451 INFO L370 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-02-19 14:09:02,453 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:09:02,453 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-02-19 14:09:02,453 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-02-19 14:09:02,453 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:09:02,453 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:09:02,453 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-19 14:09:02,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:09:02,454 INFO L85 PathProgramCache]: Analyzing trace with hash 358729069, now seen corresponding path program 1 times [2024-02-19 14:09:02,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:09:02,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294458591] [2024-02-19 14:09:02,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:09:02,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:09:02,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:09:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:09:02,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:09:02,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294458591] [2024-02-19 14:09:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294458591] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:09:02,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:09:02,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:09:02,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751393442] [2024-02-19 14:09:02,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:09:02,478 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:09:02,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:09:02,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:09:02,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:09:02,493 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-02-19 14:09:02,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:09:02,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:09:02,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-02-19 14:09:02,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:09:03,008 INFO L124 PetriNetUnfolderBase]: 4064/6083 cut-off events. [2024-02-19 14:09:03,008 INFO L125 PetriNetUnfolderBase]: For 1719/1719 co-relation queries the response was YES. [2024-02-19 14:09:03,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12457 conditions, 6083 events. 4064/6083 cut-off events. For 1719/1719 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 35315 event pairs, 4064 based on Foata normal form. 1172/7194 useless extension candidates. Maximal degree in co-relation 1995. Up to 5626 conditions per place. [2024-02-19 14:09:03,038 INFO L140 encePairwiseOnDemand]: 38/44 looper letters, 21 selfloop transitions, 1 changer transitions 0/31 dead transitions. [2024-02-19 14:09:03,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 31 transitions, 134 flow [2024-02-19 14:09:03,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:09:03,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:09:03,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-02-19 14:09:03,040 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-19 14:09:03,041 INFO L308 CegarLoopForPetriNet]: 49 programPoint places, -7 predicate places. [2024-02-19 14:09:03,041 INFO L507 AbstractCegarLoop]: Abstraction has has 42 places, 31 transitions, 134 flow [2024-02-19 14:09:03,042 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:09:03,042 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:09:03,042 INFO L234 CegarLoopForPetriNet]: trace histogram [5, 1, 1, 1, 1, 1, 1] [2024-02-19 14:09:03,042 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-02-19 14:09:03,042 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2024-02-19 14:09:03,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:09:03,043 INFO L85 PathProgramCache]: Analyzing trace with hash -675809337, now seen corresponding path program 1 times [2024-02-19 14:09:03,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:09:03,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548173083] [2024-02-19 14:09:03,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:09:03,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:09:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:03,065 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:09:03,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:03,081 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:09:03,081 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:09:03,082 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2024-02-19 14:09:03,082 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2024-02-19 14:09:03,082 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2024-02-19 14:09:03,085 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2024-02-19 14:09:03,085 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2024-02-19 14:09:03,085 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2024-02-19 14:09:03,086 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-02-19 14:09:03,086 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-19 14:09:03,086 WARN L345 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:09:03,086 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2024-02-19 14:09:03,106 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:09:03,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 60 places, 54 transitions, 148 flow [2024-02-19 14:09:03,115 INFO L124 PetriNetUnfolderBase]: 5/64 cut-off events. [2024-02-19 14:09:03,115 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2024-02-19 14:09:03,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 64 events. 5/64 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 178 event pairs, 0 based on Foata normal form. 0/48 useless extension candidates. Maximal degree in co-relation 69. Up to 6 conditions per place. [2024-02-19 14:09:03,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 60 places, 54 transitions, 148 flow [2024-02-19 14:09:03,116 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 54 transitions, 148 flow [2024-02-19 14:09:03,117 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:09:03,117 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5ed50ba8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:09:03,118 INFO L370 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-02-19 14:09:03,119 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:09:03,119 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-02-19 14:09:03,119 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-02-19 14:09:03,119 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:09:03,119 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:09:03,120 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:09:03,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:09:03,120 INFO L85 PathProgramCache]: Analyzing trace with hash -1786621893, now seen corresponding path program 1 times [2024-02-19 14:09:03,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:09:03,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624348679] [2024-02-19 14:09:03,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:09:03,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:09:03,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:09:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:09:03,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:09:03,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624348679] [2024-02-19 14:09:03,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624348679] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:09:03,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:09:03,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:09:03,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351130290] [2024-02-19 14:09:03,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:09:03,141 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:09:03,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:09:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:09:03,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:09:03,151 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 54 [2024-02-19 14:09:03,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:09:03,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:09:03,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 54 [2024-02-19 14:09:03,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:09:05,629 INFO L124 PetriNetUnfolderBase]: 26564/36649 cut-off events. [2024-02-19 14:09:05,629 INFO L125 PetriNetUnfolderBase]: For 13590/13590 co-relation queries the response was YES. [2024-02-19 14:09:05,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75524 conditions, 36649 events. 26564/36649 cut-off events. For 13590/13590 co-relation queries the response was YES. Maximal size of possible extension queue 1322. Compared 229712 event pairs, 26564 based on Foata normal form. 7422/43770 useless extension candidates. Maximal degree in co-relation 12605. Up to 34376 conditions per place. [2024-02-19 14:09:05,865 INFO L140 encePairwiseOnDemand]: 47/54 looper letters, 26 selfloop transitions, 1 changer transitions 0/38 dead transitions. [2024-02-19 14:09:05,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 38 transitions, 170 flow [2024-02-19 14:09:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:09:05,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:09:05,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 81 transitions. [2024-02-19 14:09:05,868 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-19 14:09:05,869 INFO L308 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-02-19 14:09:05,869 INFO L507 AbstractCegarLoop]: Abstraction has has 51 places, 38 transitions, 170 flow [2024-02-19 14:09:05,869 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:09:05,869 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:09:05,869 INFO L234 CegarLoopForPetriNet]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:09:05,870 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-02-19 14:09:05,870 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2024-02-19 14:09:05,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:09:05,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1355693181, now seen corresponding path program 1 times [2024-02-19 14:09:05,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:09:05,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860370315] [2024-02-19 14:09:05,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:09:05,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:09:05,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:05,880 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:09:05,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:05,896 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:09:05,897 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:09:05,897 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-02-19 14:09:05,897 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2024-02-19 14:09:05,897 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2024-02-19 14:09:05,898 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2024-02-19 14:09:05,898 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2024-02-19 14:09:05,898 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2024-02-19 14:09:05,898 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2024-02-19 14:09:05,898 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-02-19 14:09:05,898 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-19 14:09:05,899 WARN L345 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:09:05,899 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2024-02-19 14:09:05,915 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:09:05,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 64 transitions, 182 flow [2024-02-19 14:09:05,921 INFO L124 PetriNetUnfolderBase]: 6/76 cut-off events. [2024-02-19 14:09:05,922 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-02-19 14:09:05,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 76 events. 6/76 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 223 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 88. Up to 7 conditions per place. [2024-02-19 14:09:05,922 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 64 transitions, 182 flow [2024-02-19 14:09:05,923 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 64 transitions, 182 flow [2024-02-19 14:09:05,924 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:09:05,924 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5ed50ba8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:09:05,924 INFO L370 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2024-02-19 14:09:05,926 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:09:05,926 INFO L124 PetriNetUnfolderBase]: 1/18 cut-off events. [2024-02-19 14:09:05,926 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-02-19 14:09:05,926 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:09:05,926 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:09:05,926 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-02-19 14:09:05,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:09:05,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1200754130, now seen corresponding path program 1 times [2024-02-19 14:09:05,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:09:05,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228334236] [2024-02-19 14:09:05,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:09:05,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:09:05,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:09:05,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:09:05,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:09:05,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228334236] [2024-02-19 14:09:05,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228334236] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:09:05,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:09:05,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:09:05,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799938890] [2024-02-19 14:09:05,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:09:05,945 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:09:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:09:05,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:09:05,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:09:05,961 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 64 [2024-02-19 14:09:05,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 64 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:09:05,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:09:05,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 64 [2024-02-19 14:09:05,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-02-19 14:09:18,643 INFO L124 PetriNetUnfolderBase]: 164064/214479 cut-off events. [2024-02-19 14:09:18,643 INFO L125 PetriNetUnfolderBase]: For 98095/98095 co-relation queries the response was YES. [2024-02-19 14:09:19,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443980 conditions, 214479 events. 164064/214479 cut-off events. For 98095/98095 co-relation queries the response was YES. Maximal size of possible extension queue 6190. Compared 1414592 event pairs, 164064 based on Foata normal form. 44922/257900 useless extension candidates. Maximal degree in co-relation 76296. Up to 203126 conditions per place. [2024-02-19 14:09:20,649 INFO L140 encePairwiseOnDemand]: 56/64 looper letters, 31 selfloop transitions, 1 changer transitions 0/45 dead transitions. [2024-02-19 14:09:20,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 45 transitions, 208 flow [2024-02-19 14:09:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-02-19 14:09:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-02-19 14:09:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-02-19 14:09:20,651 INFO L543 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-02-19 14:09:20,652 INFO L308 CegarLoopForPetriNet]: 71 programPoint places, -11 predicate places. [2024-02-19 14:09:20,652 INFO L507 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 208 flow [2024-02-19 14:09:20,652 INFO L508 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:09:20,652 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:09:20,652 INFO L234 CegarLoopForPetriNet]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:09:20,653 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-02-19 14:09:20,653 INFO L432 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2024-02-19 14:09:20,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:09:20,654 INFO L85 PathProgramCache]: Analyzing trace with hash -700160548, now seen corresponding path program 1 times [2024-02-19 14:09:20,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:09:20,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572221852] [2024-02-19 14:09:20,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:09:20,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:09:20,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:20,673 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-02-19 14:09:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-02-19 14:09:20,691 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-02-19 14:09:20,691 INFO L372 BasicCegarLoop]: Counterexample is feasible [2024-02-19 14:09:20,692 INFO L818 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2024-02-19 14:09:20,692 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2024-02-19 14:09:20,692 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2024-02-19 14:09:20,693 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2024-02-19 14:09:20,695 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2024-02-19 14:09:20,696 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2024-02-19 14:09:20,696 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2024-02-19 14:09:20,698 INFO L818 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2024-02-19 14:09:20,698 WARN L489 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-02-19 14:09:20,699 INFO L457 BasicCegarLoop]: Path program histogram: [1, 1] [2024-02-19 14:09:20,699 WARN L345 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2024-02-19 14:09:20,700 INFO L631 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2024-02-19 14:09:20,720 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-02-19 14:09:20,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 82 places, 74 transitions, 218 flow [2024-02-19 14:09:20,733 INFO L124 PetriNetUnfolderBase]: 7/88 cut-off events. [2024-02-19 14:09:20,733 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-02-19 14:09:20,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 88 events. 7/88 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 270 event pairs, 0 based on Foata normal form. 0/66 useless extension candidates. Maximal degree in co-relation 108. Up to 8 conditions per place. [2024-02-19 14:09:20,734 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 74 transitions, 218 flow [2024-02-19 14:09:20,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 82 places, 74 transitions, 218 flow [2024-02-19 14:09:20,737 INFO L368 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-02-19 14:09:20,738 INFO L369 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@5ed50ba8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-02-19 14:09:20,738 INFO L370 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2024-02-19 14:09:20,742 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-02-19 14:09:20,742 INFO L124 PetriNetUnfolderBase]: 1/22 cut-off events. [2024-02-19 14:09:20,742 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2024-02-19 14:09:20,742 INFO L226 CegarLoopForPetriNet]: Found error trace [2024-02-19 14:09:20,742 INFO L234 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-02-19 14:09:20,742 INFO L432 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2024-02-19 14:09:20,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-02-19 14:09:20,743 INFO L85 PathProgramCache]: Analyzing trace with hash 748100036, now seen corresponding path program 1 times [2024-02-19 14:09:20,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-02-19 14:09:20,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165676798] [2024-02-19 14:09:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-02-19 14:09:20,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-02-19 14:09:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-02-19 14:09:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-02-19 14:09:20,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-02-19 14:09:20,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165676798] [2024-02-19 14:09:20,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165676798] provided 1 perfect and 0 imperfect interpolant sequences [2024-02-19 14:09:20,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-02-19 14:09:20,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-02-19 14:09:20,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979016761] [2024-02-19 14:09:20,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-02-19 14:09:20,773 INFO L584 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-02-19 14:09:20,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-02-19 14:09:20,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-02-19 14:09:20,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-02-19 14:09:20,795 INFO L498 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 74 [2024-02-19 14:09:20,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 74 transitions, 218 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-02-19 14:09:20,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-02-19 14:09:20,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 74 [2024-02-19 14:09:20,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand