./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de 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/weaver/array-eq-trans.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 e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 16:26:30,064 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 16:26:30,113 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 16:26:30,121 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 16:26:30,121 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 16:26:30,143 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 16:26:30,144 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 16:26:30,145 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 16:26:30,145 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 16:26:30,148 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 16:26:30,149 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 16:26:30,149 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 16:26:30,150 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 16:26:30,151 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 16:26:30,151 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 16:26:30,151 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 16:26:30,152 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 16:26:30,152 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 16:26:30,152 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 16:26:30,152 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 16:26:30,152 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 16:26:30,153 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 16:26:30,153 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 16:26:30,153 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 16:26:30,153 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 16:26:30,154 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 16:26:30,154 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 16:26:30,154 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 16:26:30,154 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 16:26:30,155 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 16:26:30,155 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 16:26:30,156 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 16:26:30,156 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:26:30,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 16:26:30,156 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 16:26:30,156 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 16:26:30,156 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 16:26:30,157 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 16:26:30,157 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 16:26:30,157 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 16:26:30,157 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 16:26:30,157 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 16:26:30,157 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 16:26:30,158 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e7f1528a4c77969c5bff279724a3ed43475460be047e2e4b141f1353c3ea9cfe [2024-06-27 16:26:30,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 16:26:30,433 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 16:26:30,435 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 16:26:30,436 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 16:26:30,436 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 16:26:30,437 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2024-06-27 16:26:31,411 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 16:26:31,622 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 16:26:31,623 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c [2024-06-27 16:26:31,632 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49500d915/c78d624748634c73b4d59bcace2f6768/FLAG539ab210a [2024-06-27 16:26:31,646 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/49500d915/c78d624748634c73b4d59bcace2f6768 [2024-06-27 16:26:31,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 16:26:31,649 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-06-27 16:26:31,651 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 16:26:31,651 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 16:26:31,655 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 16:26:31,657 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,658 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2405820 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31, skipping insertion in model container [2024-06-27 16:26:31,658 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,680 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 16:26:31,874 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c[2776,2789] [2024-06-27 16:26:31,890 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:26:31,900 INFO L202 MainTranslator]: Completed pre-run [2024-06-27 16:26:31,935 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/weaver/array-eq-trans.wvr.c[2776,2789] [2024-06-27 16:26:31,940 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 16:26:31,956 INFO L206 MainTranslator]: Completed translation [2024-06-27 16:26:31,957 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31 WrapperNode [2024-06-27 16:26:31,957 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 16:26:31,959 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 16:26:31,959 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 16:26:31,959 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 16:26:31,964 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:31,983 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:32,014 INFO L138 Inliner]: procedures = 23, calls = 31, calls flagged for inlining = 10, calls inlined = 14, statements flattened = 194 [2024-06-27 16:26:32,015 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 16:26:32,017 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 16:26:32,017 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 16:26:32,017 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 16:26:32,032 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:32,033 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:32,045 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:32,064 INFO L175 MemorySlicer]: Split 17 memory accesses to 2 slices as follows [2, 15]. 88 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-06-27 16:26:32,069 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:32,069 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:32,082 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:32,085 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:32,096 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:32,097 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:32,099 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 16:26:32,104 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 16:26:32,104 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 16:26:32,104 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 16:26:32,105 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (1/1) ... [2024-06-27 16:26:32,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 16:26:32,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:32,131 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) [2024-06-27 16:26:32,133 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 [2024-06-27 16:26:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 16:26:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-06-27 16:26:32,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-06-27 16:26:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-06-27 16:26:32,170 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-06-27 16:26:32,170 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-06-27 16:26:32,171 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-06-27 16:26:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 16:26:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-06-27 16:26:32,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-06-27 16:26:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-06-27 16:26:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-06-27 16:26:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 16:26:32,173 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 16:26:32,173 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-06-27 16:26:32,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-06-27 16:26:32,176 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 16:26:32,269 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 16:26:32,271 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 16:26:32,579 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 16:26:32,579 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 16:26:32,883 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 16:26:32,884 INFO L320 CfgBuilder]: Removed 6 assume(true) statements. [2024-06-27 16:26:32,885 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:26:32 BoogieIcfgContainer [2024-06-27 16:26:32,885 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 16:26:32,888 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 16:26:32,888 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 16:26:32,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 16:26:32,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 04:26:31" (1/3) ... [2024-06-27 16:26:32,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212f7ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:26:32, skipping insertion in model container [2024-06-27 16:26:32,892 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 04:26:31" (2/3) ... [2024-06-27 16:26:32,892 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@212f7ec7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 04:26:32, skipping insertion in model container [2024-06-27 16:26:32,893 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 04:26:32" (3/3) ... [2024-06-27 16:26:32,894 INFO L112 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.c [2024-06-27 16:26:32,901 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2024-06-27 16:26:32,908 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 16:26:32,909 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-06-27 16:26:32,909 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 16:26:32,956 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-06-27 16:26:33,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 40 transitions, 101 flow [2024-06-27 16:26:33,038 INFO L124 PetriNetUnfolderBase]: 9/37 cut-off events. [2024-06-27 16:26:33,038 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:26:33,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 37 events. 9/37 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 35 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 27. Up to 2 conditions per place. [2024-06-27 16:26:33,043 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 40 transitions, 101 flow [2024-06-27 16:26:33,046 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 37 places, 36 transitions, 90 flow [2024-06-27 16:26:33,061 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 16:26:33,067 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=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;@cd3f71c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 16:26:33,068 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-27 16:26:33,083 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 16:26:33,083 INFO L124 PetriNetUnfolderBase]: 9/35 cut-off events. [2024-06-27 16:26:33,083 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-06-27 16:26:33,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:33,084 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:33,084 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:33,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:33,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1892444017, now seen corresponding path program 1 times [2024-06-27 16:26:33,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:33,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91613451] [2024-06-27 16:26:33,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:33,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:33,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:26:33,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:33,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91613451] [2024-06-27 16:26:33,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91613451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:33,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:33,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 16:26:33,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433849327] [2024-06-27 16:26:33,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:33,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 16:26:33,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:33,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 16:26:33,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-27 16:26:33,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:26:33,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 90 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:33,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:33,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:26:33,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:34,096 INFO L124 PetriNetUnfolderBase]: 1693/2288 cut-off events. [2024-06-27 16:26:34,096 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2024-06-27 16:26:34,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4716 conditions, 2288 events. 1693/2288 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 9381 event pairs, 923 based on Foata normal form. 1/1521 useless extension candidates. Maximal degree in co-relation 2641. Up to 1399 conditions per place. [2024-06-27 16:26:34,109 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 31 selfloop transitions, 2 changer transitions 26/63 dead transitions. [2024-06-27 16:26:34,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 63 transitions, 280 flow [2024-06-27 16:26:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 16:26:34,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 16:26:34,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2024-06-27 16:26:34,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-06-27 16:26:34,150 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 90 flow. Second operand 4 states and 89 transitions. [2024-06-27 16:26:34,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 63 transitions, 280 flow [2024-06-27 16:26:34,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 34 places, 63 transitions, 256 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 16:26:34,157 INFO L231 Difference]: Finished difference. Result has 36 places, 37 transitions, 94 flow [2024-06-27 16:26:34,159 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=94, PETRI_PLACES=36, PETRI_TRANSITIONS=37} [2024-06-27 16:26:34,161 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, -1 predicate places. [2024-06-27 16:26:34,161 INFO L495 AbstractCegarLoop]: Abstraction has has 36 places, 37 transitions, 94 flow [2024-06-27 16:26:34,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:34,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:34,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:34,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 16:26:34,162 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:34,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:34,163 INFO L85 PathProgramCache]: Analyzing trace with hash -377412116, now seen corresponding path program 1 times [2024-06-27 16:26:34,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:34,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525323264] [2024-06-27 16:26:34,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:34,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:26:34,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:34,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525323264] [2024-06-27 16:26:34,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525323264] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:34,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137758055] [2024-06-27 16:26:34,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:34,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:34,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:34,371 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) [2024-06-27 16:26:34,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-06-27 16:26:34,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:34,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 16:26:34,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:34,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:26:34,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:34,727 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:26:34,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 55 [2024-06-27 16:26:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:26:34,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137758055] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:34,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:26:34,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2024-06-27 16:26:34,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871098280] [2024-06-27 16:26:34,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:34,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:26:34,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:34,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:26:34,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-06-27 16:26:34,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:26:34,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 37 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:34,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:34,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:26:34,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:35,125 INFO L124 PetriNetUnfolderBase]: 1898/2559 cut-off events. [2024-06-27 16:26:35,125 INFO L125 PetriNetUnfolderBase]: For 177/177 co-relation queries the response was YES. [2024-06-27 16:26:35,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5378 conditions, 2559 events. 1898/2559 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 10847 event pairs, 461 based on Foata normal form. 1/1901 useless extension candidates. Maximal degree in co-relation 5366. Up to 1070 conditions per place. [2024-06-27 16:26:35,140 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 50 selfloop transitions, 4 changer transitions 20/78 dead transitions. [2024-06-27 16:26:35,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 78 transitions, 340 flow [2024-06-27 16:26:35,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:26:35,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:26:35,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-27 16:26:35,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-06-27 16:26:35,143 INFO L175 Difference]: Start difference. First operand has 36 places, 37 transitions, 94 flow. Second operand 5 states and 110 transitions. [2024-06-27 16:26:35,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 78 transitions, 340 flow [2024-06-27 16:26:35,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 78 transitions, 326 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-27 16:26:35,153 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 108 flow [2024-06-27 16:26:35,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-06-27 16:26:35,154 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 3 predicate places. [2024-06-27 16:26:35,154 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 108 flow [2024-06-27 16:26:35,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:35,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:35,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:35,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:35,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:35,371 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:35,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:35,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1636848034, now seen corresponding path program 1 times [2024-06-27 16:26:35,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:35,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866858058] [2024-06-27 16:26:35,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:35,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:35,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:35,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866858058] [2024-06-27 16:26:35,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866858058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:35,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:35,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:26:35,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792601568] [2024-06-27 16:26:35,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:35,472 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:26:35,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:35,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:26:35,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:26:35,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:26:35,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 108 flow. Second operand has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:35,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:35,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:26:35,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:35,666 INFO L124 PetriNetUnfolderBase]: 1508/2080 cut-off events. [2024-06-27 16:26:35,667 INFO L125 PetriNetUnfolderBase]: For 523/523 co-relation queries the response was YES. [2024-06-27 16:26:35,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4544 conditions, 2080 events. 1508/2080 cut-off events. For 523/523 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8391 event pairs, 886 based on Foata normal form. 57/1580 useless extension candidates. Maximal degree in co-relation 4530. Up to 1870 conditions per place. [2024-06-27 16:26:35,677 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 32 selfloop transitions, 3 changer transitions 19/58 dead transitions. [2024-06-27 16:26:35,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 58 transitions, 259 flow [2024-06-27 16:26:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:26:35,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:26:35,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 16:26:35,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44 [2024-06-27 16:26:35,679 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 108 flow. Second operand 5 states and 88 transitions. [2024-06-27 16:26:35,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 58 transitions, 259 flow [2024-06-27 16:26:35,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 58 transitions, 252 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 16:26:35,681 INFO L231 Difference]: Finished difference. Result has 42 places, 39 transitions, 117 flow [2024-06-27 16:26:35,681 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=42, PETRI_TRANSITIONS=39} [2024-06-27 16:26:35,681 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 5 predicate places. [2024-06-27 16:26:35,681 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 39 transitions, 117 flow [2024-06-27 16:26:35,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.4) internal successors, (57), 5 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:35,682 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:35,682 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:35,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 16:26:35,682 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:35,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:35,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1403967229, now seen corresponding path program 1 times [2024-06-27 16:26:35,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:35,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47193827] [2024-06-27 16:26:35,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:35,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:35,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:35,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:35,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47193827] [2024-06-27 16:26:35,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47193827] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:35,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804956763] [2024-06-27 16:26:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:35,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:35,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:35,935 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) [2024-06-27 16:26:35,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-06-27 16:26:36,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:36,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 9 conjunts are in the unsatisfiable core [2024-06-27 16:26:36,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:36,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:36,166 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:26:36,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 55 [2024-06-27 16:26:36,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:36,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804956763] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:36,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:26:36,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2024-06-27 16:26:36,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391154728] [2024-06-27 16:26:36,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:36,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:26:36,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:36,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:26:36,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2024-06-27 16:26:36,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:26:36,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 39 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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) [2024-06-27 16:26:36,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:36,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:26:36,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:36,557 INFO L124 PetriNetUnfolderBase]: 3090/4301 cut-off events. [2024-06-27 16:26:36,557 INFO L125 PetriNetUnfolderBase]: For 1238/1238 co-relation queries the response was YES. [2024-06-27 16:26:36,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9559 conditions, 4301 events. 3090/4301 cut-off events. For 1238/1238 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 20423 event pairs, 693 based on Foata normal form. 2/3334 useless extension candidates. Maximal degree in co-relation 9537. Up to 1320 conditions per place. [2024-06-27 16:26:36,576 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 70 selfloop transitions, 6 changer transitions 19/99 dead transitions. [2024-06-27 16:26:36,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 99 transitions, 475 flow [2024-06-27 16:26:36,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:36,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:36,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-27 16:26:36,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 16:26:36,578 INFO L175 Difference]: Start difference. First operand has 42 places, 39 transitions, 117 flow. Second operand 7 states and 140 transitions. [2024-06-27 16:26:36,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 99 transitions, 475 flow [2024-06-27 16:26:36,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 99 transitions, 461 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-27 16:26:36,580 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 137 flow [2024-06-27 16:26:36,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=109, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=137, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2024-06-27 16:26:36,581 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 10 predicate places. [2024-06-27 16:26:36,581 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 137 flow [2024-06-27 16:26:36,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.833333333333334) internal successors, (65), 6 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) [2024-06-27 16:26:36,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:36,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:36,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:36,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2024-06-27 16:26:36,794 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:36,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:36,795 INFO L85 PathProgramCache]: Analyzing trace with hash -471271938, now seen corresponding path program 1 times [2024-06-27 16:26:36,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:36,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018492220] [2024-06-27 16:26:36,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:36,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:36,890 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:36,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:36,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018492220] [2024-06-27 16:26:36,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018492220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:36,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:36,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 16:26:36,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125399015] [2024-06-27 16:26:36,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:36,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 16:26:36,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:36,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 16:26:36,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-27 16:26:36,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:26:36,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 137 flow. Second operand has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:36,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:36,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:26:36,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:37,167 INFO L124 PetriNetUnfolderBase]: 2709/3833 cut-off events. [2024-06-27 16:26:37,167 INFO L125 PetriNetUnfolderBase]: For 1511/1511 co-relation queries the response was YES. [2024-06-27 16:26:37,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9057 conditions, 3833 events. 2709/3833 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 17718 event pairs, 1951 based on Foata normal form. 88/3387 useless extension candidates. Maximal degree in co-relation 9032. Up to 3535 conditions per place. [2024-06-27 16:26:37,187 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 35 selfloop transitions, 3 changer transitions 19/61 dead transitions. [2024-06-27 16:26:37,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 61 transitions, 305 flow [2024-06-27 16:26:37,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 16:26:37,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 16:26:37,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2024-06-27 16:26:37,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.435 [2024-06-27 16:26:37,190 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 137 flow. Second operand 5 states and 87 transitions. [2024-06-27 16:26:37,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 61 transitions, 305 flow [2024-06-27 16:26:37,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 61 transitions, 299 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-27 16:26:37,193 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 147 flow [2024-06-27 16:26:37,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=147, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-27 16:26:37,195 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 12 predicate places. [2024-06-27 16:26:37,196 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 147 flow [2024-06-27 16:26:37,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.8) internal successors, (59), 5 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:37,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:37,196 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:37,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 16:26:37,196 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:37,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:37,197 INFO L85 PathProgramCache]: Analyzing trace with hash -283613148, now seen corresponding path program 1 times [2024-06-27 16:26:37,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:37,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319308228] [2024-06-27 16:26:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:37,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:37,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:37,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319308228] [2024-06-27 16:26:37,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319308228] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:37,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467967622] [2024-06-27 16:26:37,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:37,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:37,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:37,339 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) [2024-06-27 16:26:37,368 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-06-27 16:26:37,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:37,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 10 conjunts are in the unsatisfiable core [2024-06-27 16:26:37,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:37,566 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:37,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:37,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467967622] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:37,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:26:37,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 13 [2024-06-27 16:26:37,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590176849] [2024-06-27 16:26:37,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:37,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 16:26:37,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:37,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 16:26:37,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-06-27 16:26:37,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:26:37,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 147 flow. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:37,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:37,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:26:37,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:38,089 INFO L124 PetriNetUnfolderBase]: 4258/6144 cut-off events. [2024-06-27 16:26:38,089 INFO L125 PetriNetUnfolderBase]: For 3237/3237 co-relation queries the response was YES. [2024-06-27 16:26:38,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14865 conditions, 6144 events. 4258/6144 cut-off events. For 3237/3237 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31038 event pairs, 1533 based on Foata normal form. 0/5638 useless extension candidates. Maximal degree in co-relation 14839. Up to 2546 conditions per place. [2024-06-27 16:26:38,115 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 72 selfloop transitions, 7 changer transitions 0/83 dead transitions. [2024-06-27 16:26:38,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 83 transitions, 445 flow [2024-06-27 16:26:38,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 16:26:38,117 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.425 [2024-06-27 16:26:38,117 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 147 flow. Second operand 7 states and 119 transitions. [2024-06-27 16:26:38,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 83 transitions, 445 flow [2024-06-27 16:26:38,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 83 transitions, 433 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 16:26:38,120 INFO L231 Difference]: Finished difference. Result has 53 places, 44 transitions, 167 flow [2024-06-27 16:26:38,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=167, PETRI_PLACES=53, PETRI_TRANSITIONS=44} [2024-06-27 16:26:38,120 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 16 predicate places. [2024-06-27 16:26:38,121 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 44 transitions, 167 flow [2024-06-27 16:26:38,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:38,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:38,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:38,134 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:38,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:38,331 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:38,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:38,332 INFO L85 PathProgramCache]: Analyzing trace with hash 147700837, now seen corresponding path program 1 times [2024-06-27 16:26:38,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:38,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350899932] [2024-06-27 16:26:38,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:38,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:38,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:39,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:39,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:39,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350899932] [2024-06-27 16:26:39,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350899932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 16:26:39,304 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 16:26:39,304 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 16:26:39,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368457746] [2024-06-27 16:26:39,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:26:39,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:26:39,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:39,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:26:39,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-27 16:26:39,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:26:39,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 44 transitions, 167 flow. Second operand has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:39,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:39,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:26:39,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:39,787 INFO L124 PetriNetUnfolderBase]: 4883/7037 cut-off events. [2024-06-27 16:26:39,788 INFO L125 PetriNetUnfolderBase]: For 3650/3650 co-relation queries the response was YES. [2024-06-27 16:26:39,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18186 conditions, 7037 events. 4883/7037 cut-off events. For 3650/3650 co-relation queries the response was YES. Maximal size of possible extension queue 326. Compared 36787 event pairs, 1035 based on Foata normal form. 2/7036 useless extension candidates. Maximal degree in co-relation 18158. Up to 6187 conditions per place. [2024-06-27 16:26:39,828 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 75 selfloop transitions, 13 changer transitions 2/94 dead transitions. [2024-06-27 16:26:39,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 94 transitions, 502 flow [2024-06-27 16:26:39,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:26:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:26:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-27 16:26:39,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-06-27 16:26:39,832 INFO L175 Difference]: Start difference. First operand has 53 places, 44 transitions, 167 flow. Second operand 6 states and 126 transitions. [2024-06-27 16:26:39,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 94 transitions, 502 flow [2024-06-27 16:26:39,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 94 transitions, 496 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 16:26:39,837 INFO L231 Difference]: Finished difference. Result has 58 places, 55 transitions, 276 flow [2024-06-27 16:26:39,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=276, PETRI_PLACES=58, PETRI_TRANSITIONS=55} [2024-06-27 16:26:39,838 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 21 predicate places. [2024-06-27 16:26:39,838 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 55 transitions, 276 flow [2024-06-27 16:26:39,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:39,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:39,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:39,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 16:26:39,839 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:39,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:39,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1704572735, now seen corresponding path program 1 times [2024-06-27 16:26:39,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:39,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615874750] [2024-06-27 16:26:39,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:39,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:39,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:39,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:39,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615874750] [2024-06-27 16:26:39,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615874750] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:39,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144136127] [2024-06-27 16:26:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:39,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:39,993 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) [2024-06-27 16:26:40,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-06-27 16:26:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:40,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 16 conjunts are in the unsatisfiable core [2024-06-27 16:26:40,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:40,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:40,225 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-06-27 16:26:40,226 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 39 [2024-06-27 16:26:40,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-06-27 16:26:40,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [144136127] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:40,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:40,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2024-06-27 16:26:40,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313786639] [2024-06-27 16:26:40,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:40,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 16:26:40,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:40,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 16:26:40,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 16:26:40,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:26:40,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 55 transitions, 276 flow. Second operand has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 13 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:40,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:40,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:26:40,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:41,266 INFO L124 PetriNetUnfolderBase]: 8411/12220 cut-off events. [2024-06-27 16:26:41,267 INFO L125 PetriNetUnfolderBase]: For 13367/13367 co-relation queries the response was YES. [2024-06-27 16:26:41,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34852 conditions, 12220 events. 8411/12220 cut-off events. For 13367/13367 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 70141 event pairs, 5532 based on Foata normal form. 172/12384 useless extension candidates. Maximal degree in co-relation 31408. Up to 7015 conditions per place. [2024-06-27 16:26:41,326 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 88 selfloop transitions, 5 changer transitions 23/120 dead transitions. [2024-06-27 16:26:41,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 120 transitions, 822 flow [2024-06-27 16:26:41,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 16:26:41,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 16:26:41,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 16:26:41,328 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 16:26:41,328 INFO L175 Difference]: Start difference. First operand has 58 places, 55 transitions, 276 flow. Second operand 7 states and 130 transitions. [2024-06-27 16:26:41,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 120 transitions, 822 flow [2024-06-27 16:26:41,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 120 transitions, 807 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-06-27 16:26:41,338 INFO L231 Difference]: Finished difference. Result has 67 places, 58 transitions, 318 flow [2024-06-27 16:26:41,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=268, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=318, PETRI_PLACES=67, PETRI_TRANSITIONS=58} [2024-06-27 16:26:41,339 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 30 predicate places. [2024-06-27 16:26:41,339 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 58 transitions, 318 flow [2024-06-27 16:26:41,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.307692307692308) internal successors, (160), 13 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:41,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:41,340 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:41,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:41,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:41,556 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:41,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:41,557 INFO L85 PathProgramCache]: Analyzing trace with hash 127876301, now seen corresponding path program 1 times [2024-06-27 16:26:41,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:41,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98164819] [2024-06-27 16:26:41,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:41,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:42,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:26:42,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:42,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98164819] [2024-06-27 16:26:42,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98164819] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:42,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882177691] [2024-06-27 16:26:42,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:42,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:42,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:42,597 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) [2024-06-27 16:26:42,620 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-06-27 16:26:42,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:42,713 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:26:42,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:43,008 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:43,009 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:43,793 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-06-27 16:26:43,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 236 [2024-06-27 16:26:50,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:50,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882177691] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:26:50,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:26:50,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 21 [2024-06-27 16:26:50,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978368562] [2024-06-27 16:26:50,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:26:50,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:26:50,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:26:50,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:26:50,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:26:50,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:26:50,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 58 transitions, 318 flow. Second operand has 22 states, 22 states have (on average 10.681818181818182) internal successors, (235), 22 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:50,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:26:50,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:26:50,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:26:55,011 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-06-27 16:26:56,212 INFO L124 PetriNetUnfolderBase]: 11472/16731 cut-off events. [2024-06-27 16:26:56,213 INFO L125 PetriNetUnfolderBase]: For 14710/14718 co-relation queries the response was YES. [2024-06-27 16:26:56,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47290 conditions, 16731 events. 11472/16731 cut-off events. For 14710/14718 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 102430 event pairs, 2095 based on Foata normal form. 18/16737 useless extension candidates. Maximal degree in co-relation 41834. Up to 8956 conditions per place. [2024-06-27 16:26:56,343 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 149 selfloop transitions, 47 changer transitions 4/204 dead transitions. [2024-06-27 16:26:56,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 204 transitions, 1287 flow [2024-06-27 16:26:56,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-06-27 16:26:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-06-27 16:26:56,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 297 transitions. [2024-06-27 16:26:56,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4640625 [2024-06-27 16:26:56,346 INFO L175 Difference]: Start difference. First operand has 67 places, 58 transitions, 318 flow. Second operand 16 states and 297 transitions. [2024-06-27 16:26:56,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 204 transitions, 1287 flow [2024-06-27 16:26:56,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 204 transitions, 1267 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 16:26:56,394 INFO L231 Difference]: Finished difference. Result has 87 places, 87 transitions, 703 flow [2024-06-27 16:26:56,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=703, PETRI_PLACES=87, PETRI_TRANSITIONS=87} [2024-06-27 16:26:56,395 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 50 predicate places. [2024-06-27 16:26:56,395 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 87 transitions, 703 flow [2024-06-27 16:26:56,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.681818181818182) internal successors, (235), 22 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:26:56,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:26:56,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:26:56,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-06-27 16:26:56,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:56,610 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:26:56,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:26:56,611 INFO L85 PathProgramCache]: Analyzing trace with hash 1859023661, now seen corresponding path program 2 times [2024-06-27 16:26:56,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:26:56,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740215492] [2024-06-27 16:26:56,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:26:56,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:26:56,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:26:57,364 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:57,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:26:57,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740215492] [2024-06-27 16:26:57,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740215492] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:26:57,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123131371] [2024-06-27 16:26:57,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:26:57,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:26:57,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:26:57,368 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) [2024-06-27 16:26:57,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-06-27 16:26:57,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:26:57,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:26:57,500 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 42 conjunts are in the unsatisfiable core [2024-06-27 16:26:57,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:26:58,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:26:58,144 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:26:58,852 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2024-06-27 16:26:58,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 235 [2024-06-27 16:27:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:06,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123131371] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:06,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:27:06,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 10] total 20 [2024-06-27 16:27:06,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479556741] [2024-06-27 16:27:06,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:27:06,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 16:27:06,441 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:06,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 16:27:06,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=318, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:27:06,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:27:06,442 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 87 transitions, 703 flow. Second operand has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:06,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:06,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:27:06,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:07,658 INFO L124 PetriNetUnfolderBase]: 11472/16701 cut-off events. [2024-06-27 16:27:07,658 INFO L125 PetriNetUnfolderBase]: For 32157/32161 co-relation queries the response was YES. [2024-06-27 16:27:07,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55181 conditions, 16701 events. 11472/16701 cut-off events. For 32157/32161 co-relation queries the response was YES. Maximal size of possible extension queue 832. Compared 102109 event pairs, 3410 based on Foata normal form. 14/16707 useless extension candidates. Maximal degree in co-relation 51777. Up to 8956 conditions per place. [2024-06-27 16:27:07,777 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 95 selfloop transitions, 38 changer transitions 2/139 dead transitions. [2024-06-27 16:27:07,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 139 transitions, 1179 flow [2024-06-27 16:27:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 16:27:07,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 16:27:07,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-27 16:27:07,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2024-06-27 16:27:07,779 INFO L175 Difference]: Start difference. First operand has 87 places, 87 transitions, 703 flow. Second operand 6 states and 136 transitions. [2024-06-27 16:27:07,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 139 transitions, 1179 flow [2024-06-27 16:27:07,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 139 transitions, 1132 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 16:27:07,913 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 809 flow [2024-06-27 16:27:07,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=809, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2024-06-27 16:27:07,914 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 54 predicate places. [2024-06-27 16:27:07,914 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 809 flow [2024-06-27 16:27:07,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.375) internal successors, (83), 8 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:07,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:07,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:07,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:08,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:08,125 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:27:08,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:08,125 INFO L85 PathProgramCache]: Analyzing trace with hash -482371963, now seen corresponding path program 1 times [2024-06-27 16:27:08,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:08,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257630438] [2024-06-27 16:27:08,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:08,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:08,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:09,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-06-27 16:27:09,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:09,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257630438] [2024-06-27 16:27:09,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257630438] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:09,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749281166] [2024-06-27 16:27:09,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:09,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:09,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:09,041 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) [2024-06-27 16:27:09,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-06-27 16:27:09,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:09,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 19 conjunts are in the unsatisfiable core [2024-06-27 16:27:09,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:09,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:10,029 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-06-27 16:27:10,029 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 60 treesize of output 236 [2024-06-27 16:27:15,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:15,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749281166] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:15,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:15,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 21 [2024-06-27 16:27:15,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517328904] [2024-06-27 16:27:15,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:15,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-06-27 16:27:15,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:15,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-06-27 16:27:15,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2024-06-27 16:27:15,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:27:15,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 809 flow. Second operand has 22 states, 22 states have (on average 10.681818181818182) internal successors, (235), 22 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:15,638 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:15,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:27:15,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:17,222 INFO L124 PetriNetUnfolderBase]: 12984/18911 cut-off events. [2024-06-27 16:27:17,222 INFO L125 PetriNetUnfolderBase]: For 41849/41849 co-relation queries the response was YES. [2024-06-27 16:27:17,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63705 conditions, 18911 events. 12984/18911 cut-off events. For 41849/41849 co-relation queries the response was YES. Maximal size of possible extension queue 961. Compared 117575 event pairs, 2185 based on Foata normal form. 8/18909 useless extension candidates. Maximal degree in co-relation 60334. Up to 13372 conditions per place. [2024-06-27 16:27:17,389 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 131 selfloop transitions, 45 changer transitions 3/183 dead transitions. [2024-06-27 16:27:17,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 183 transitions, 1695 flow [2024-06-27 16:27:17,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 16:27:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 16:27:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 207 transitions. [2024-06-27 16:27:17,399 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43125 [2024-06-27 16:27:17,399 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 809 flow. Second operand 12 states and 207 transitions. [2024-06-27 16:27:17,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 183 transitions, 1695 flow [2024-06-27 16:27:17,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 183 transitions, 1594 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 16:27:17,613 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 1066 flow [2024-06-27 16:27:17,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1066, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2024-06-27 16:27:17,614 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 64 predicate places. [2024-06-27 16:27:17,614 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 1066 flow [2024-06-27 16:27:17,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.681818181818182) internal successors, (235), 22 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:17,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:17,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 16:27:17,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:17,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:17,826 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:27:17,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:17,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1908776229, now seen corresponding path program 2 times [2024-06-27 16:27:17,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:17,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257412822] [2024-06-27 16:27:17,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:17,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:17,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:18,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:18,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257412822] [2024-06-27 16:27:18,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257412822] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:18,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684847326] [2024-06-27 16:27:18,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:27:18,495 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:18,495 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:18,496 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) [2024-06-27 16:27:18,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-06-27 16:27:18,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:27:18,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:18,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 16:27:18,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:19,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:19,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:19,820 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2024-06-27 16:27:19,820 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 79 treesize of output 235 [2024-06-27 16:27:27,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:27:27,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684847326] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:27:27,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:27:27,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 7] total 20 [2024-06-27 16:27:27,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087388351] [2024-06-27 16:27:27,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:27:27,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-06-27 16:27:27,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:27,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-06-27 16:27:27,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2024-06-27 16:27:27,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:27:27,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 1066 flow. Second operand has 21 states, 21 states have (on average 10.380952380952381) internal successors, (218), 21 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:27,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:27,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:27:27,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:31,380 INFO L124 PetriNetUnfolderBase]: 20434/29883 cut-off events. [2024-06-27 16:27:31,380 INFO L125 PetriNetUnfolderBase]: For 76338/76338 co-relation queries the response was YES. [2024-06-27 16:27:31,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103653 conditions, 29883 events. 20434/29883 cut-off events. For 76338/76338 co-relation queries the response was YES. Maximal size of possible extension queue 1504. Compared 200367 event pairs, 4308 based on Foata normal form. 20/29899 useless extension candidates. Maximal degree in co-relation 99716. Up to 12854 conditions per place. [2024-06-27 16:27:31,617 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 235 selfloop transitions, 155 changer transitions 28/422 dead transitions. [2024-06-27 16:27:31,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 422 transitions, 3711 flow [2024-06-27 16:27:31,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-06-27 16:27:31,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-06-27 16:27:31,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 537 transitions. [2024-06-27 16:27:31,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46293103448275863 [2024-06-27 16:27:31,619 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 1066 flow. Second operand 29 states and 537 transitions. [2024-06-27 16:27:31,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 422 transitions, 3711 flow [2024-06-27 16:27:32,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 422 transitions, 3680 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 16:27:32,350 INFO L231 Difference]: Finished difference. Result has 139 places, 214 transitions, 2745 flow [2024-06-27 16:27:32,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1035, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=2745, PETRI_PLACES=139, PETRI_TRANSITIONS=214} [2024-06-27 16:27:32,351 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 102 predicate places. [2024-06-27 16:27:32,351 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 214 transitions, 2745 flow [2024-06-27 16:27:32,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.380952380952381) internal successors, (218), 21 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:32,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:32,352 INFO L208 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, 1, 1, 1, 1, 1] [2024-06-27 16:27:32,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-06-27 16:27:32,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-06-27 16:27:32,557 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:27:32,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:32,557 INFO L85 PathProgramCache]: Analyzing trace with hash -196833306, now seen corresponding path program 2 times [2024-06-27 16:27:32,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:32,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933976343] [2024-06-27 16:27:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:32,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:32,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:34,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:27:34,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:34,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933976343] [2024-06-27 16:27:34,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933976343] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:34,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780274457] [2024-06-27 16:27:34,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-06-27 16:27:34,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:34,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:34,011 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) [2024-06-27 16:27:34,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-06-27 16:27:34,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:27:34,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:34,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 43 conjunts are in the unsatisfiable core [2024-06-27 16:27:34,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:34,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:27:34,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:35,429 INFO L349 Elim1Store]: treesize reduction 8, result has 96.5 percent of original size [2024-06-27 16:27:35,429 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 96 treesize of output 236 [2024-06-27 16:27:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:27:42,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780274457] provided 1 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:42,547 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-06-27 16:27:42,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14, 11] total 28 [2024-06-27 16:27:42,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798682788] [2024-06-27 16:27:42,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 16:27:42,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 16:27:42,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:27:42,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 16:27:42,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2024-06-27 16:27:42,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:27:42,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 214 transitions, 2745 flow. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:42,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:27:42,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:27:42,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:27:45,907 INFO L124 PetriNetUnfolderBase]: 21215/31120 cut-off events. [2024-06-27 16:27:45,907 INFO L125 PetriNetUnfolderBase]: For 135415/135415 co-relation queries the response was YES. [2024-06-27 16:27:46,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 123473 conditions, 31120 events. 21215/31120 cut-off events. For 135415/135415 co-relation queries the response was YES. Maximal size of possible extension queue 1602. Compared 210009 event pairs, 7345 based on Foata normal form. 2/31118 useless extension candidates. Maximal degree in co-relation 119660. Up to 27006 conditions per place. [2024-06-27 16:27:46,411 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 180 selfloop transitions, 93 changer transitions 18/295 dead transitions. [2024-06-27 16:27:46,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 295 transitions, 3910 flow [2024-06-27 16:27:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 16:27:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 16:27:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 172 transitions. [2024-06-27 16:27:46,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-06-27 16:27:46,412 INFO L175 Difference]: Start difference. First operand has 139 places, 214 transitions, 2745 flow. Second operand 8 states and 172 transitions. [2024-06-27 16:27:46,412 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 295 transitions, 3910 flow [2024-06-27 16:27:48,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 295 transitions, 3590 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-27 16:27:48,175 INFO L231 Difference]: Finished difference. Result has 143 places, 235 transitions, 3058 flow [2024-06-27 16:27:48,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2503, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3058, PETRI_PLACES=143, PETRI_TRANSITIONS=235} [2024-06-27 16:27:48,175 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 106 predicate places. [2024-06-27 16:27:48,176 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 235 transitions, 3058 flow [2024-06-27 16:27:48,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:27:48,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:27:48,176 INFO L208 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, 1, 1, 1, 1, 1] [2024-06-27 16:27:48,199 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-06-27 16:27:48,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-06-27 16:27:48,390 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:27:48,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:27:48,390 INFO L85 PathProgramCache]: Analyzing trace with hash -860482464, now seen corresponding path program 3 times [2024-06-27 16:27:48,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:27:48,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301886044] [2024-06-27 16:27:48,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:27:48,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:27:48,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:27:49,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:27:49,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:27:49,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301886044] [2024-06-27 16:27:49,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301886044] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:27:49,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104464155] [2024-06-27 16:27:49,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-06-27 16:27:49,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:27:49,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:27:49,607 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) [2024-06-27 16:27:49,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-06-27 16:27:49,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-06-27 16:27:49,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:27:49,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 16:27:49,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:27:50,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:27:50,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:27:50,758 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-06-27 16:27:50,759 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 237 [2024-06-27 16:28:00,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:28:00,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104464155] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:28:00,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:28:00,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 7] total 25 [2024-06-27 16:28:00,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627766590] [2024-06-27 16:28:00,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:28:00,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-06-27 16:28:00,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:28:00,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-06-27 16:28:00,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2024-06-27 16:28:00,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:28:00,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 235 transitions, 3058 flow. Second operand has 26 states, 26 states have (on average 9.76923076923077) internal successors, (254), 26 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:28:00,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:28:00,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:28:00,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:28:04,074 INFO L124 PetriNetUnfolderBase]: 22106/32539 cut-off events. [2024-06-27 16:28:04,074 INFO L125 PetriNetUnfolderBase]: For 141518/141518 co-relation queries the response was YES. [2024-06-27 16:28:04,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131400 conditions, 32539 events. 22106/32539 cut-off events. For 141518/141518 co-relation queries the response was YES. Maximal size of possible extension queue 1689. Compared 222798 event pairs, 7343 based on Foata normal form. 2/32537 useless extension candidates. Maximal degree in co-relation 127074. Up to 27394 conditions per place. [2024-06-27 16:28:04,465 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 174 selfloop transitions, 121 changer transitions 25/324 dead transitions. [2024-06-27 16:28:04,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 324 transitions, 4370 flow [2024-06-27 16:28:04,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-06-27 16:28:04,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-06-27 16:28:04,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 246 transitions. [2024-06-27 16:28:04,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36176470588235293 [2024-06-27 16:28:04,466 INFO L175 Difference]: Start difference. First operand has 143 places, 235 transitions, 3058 flow. Second operand 17 states and 246 transitions. [2024-06-27 16:28:04,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 324 transitions, 4370 flow [2024-06-27 16:28:06,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 324 transitions, 4278 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 16:28:06,622 INFO L231 Difference]: Finished difference. Result has 162 places, 255 transitions, 3587 flow [2024-06-27 16:28:06,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2982, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=235, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=3587, PETRI_PLACES=162, PETRI_TRANSITIONS=255} [2024-06-27 16:28:06,623 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 125 predicate places. [2024-06-27 16:28:06,623 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 255 transitions, 3587 flow [2024-06-27 16:28:06,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 9.76923076923077) internal successors, (254), 26 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:28:06,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:28:06,624 INFO L208 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, 1, 1, 1, 1, 1] [2024-06-27 16:28:06,635 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-06-27 16:28:06,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-06-27 16:28:06,825 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:28:06,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:28:06,826 INFO L85 PathProgramCache]: Analyzing trace with hash 796958896, now seen corresponding path program 4 times [2024-06-27 16:28:06,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:28:06,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2581800] [2024-06-27 16:28:06,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:28:06,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:28:06,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:28:08,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:28:08,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:28:08,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2581800] [2024-06-27 16:28:08,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2581800] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:28:08,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132878073] [2024-06-27 16:28:08,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-06-27 16:28:08,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:28:08,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:28:08,050 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) [2024-06-27 16:28:08,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-06-27 16:28:08,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-06-27 16:28:08,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:28:08,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 16:28:08,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:28:08,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:28:08,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:28:09,361 INFO L349 Elim1Store]: treesize reduction 11, result has 96.5 percent of original size [2024-06-27 16:28:09,361 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 127 treesize of output 335 [2024-06-27 16:28:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:28:23,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132878073] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:28:23,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:28:23,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 7] total 29 [2024-06-27 16:28:23,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186329010] [2024-06-27 16:28:23,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:28:23,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:28:23,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:28:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:28:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:28:23,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:28:23,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 255 transitions, 3587 flow. Second operand has 30 states, 30 states have (on average 9.733333333333333) internal successors, (292), 30 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:28:23,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:28:23,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:28:23,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:28:29,222 INFO L124 PetriNetUnfolderBase]: 24012/35311 cut-off events. [2024-06-27 16:28:29,222 INFO L125 PetriNetUnfolderBase]: For 162193/162193 co-relation queries the response was YES. [2024-06-27 16:28:29,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 145244 conditions, 35311 events. 24012/35311 cut-off events. For 162193/162193 co-relation queries the response was YES. Maximal size of possible extension queue 1840. Compared 243097 event pairs, 7956 based on Foata normal form. 38/35345 useless extension candidates. Maximal degree in co-relation 140781. Up to 27199 conditions per place. [2024-06-27 16:28:29,609 INFO L140 encePairwiseOnDemand]: 23/40 looper letters, 243 selfloop transitions, 168 changer transitions 84/499 dead transitions. [2024-06-27 16:28:29,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 499 transitions, 6651 flow [2024-06-27 16:28:29,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:28:29,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:28:29,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 433 transitions. [2024-06-27 16:28:29,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009259259259259 [2024-06-27 16:28:29,611 INFO L175 Difference]: Start difference. First operand has 162 places, 255 transitions, 3587 flow. Second operand 27 states and 433 transitions. [2024-06-27 16:28:29,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 499 transitions, 6651 flow [2024-06-27 16:28:32,427 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 499 transitions, 6351 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-27 16:28:32,432 INFO L231 Difference]: Finished difference. Result has 190 places, 303 transitions, 4627 flow [2024-06-27 16:28:32,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3384, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=4627, PETRI_PLACES=190, PETRI_TRANSITIONS=303} [2024-06-27 16:28:32,433 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 153 predicate places. [2024-06-27 16:28:32,433 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 303 transitions, 4627 flow [2024-06-27 16:28:32,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.733333333333333) internal successors, (292), 30 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:28:32,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:28:32,433 INFO L208 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, 1, 1, 1, 1, 1] [2024-06-27 16:28:32,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-06-27 16:28:32,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-06-27 16:28:32,634 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:28:32,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:28:32,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1512278870, now seen corresponding path program 5 times [2024-06-27 16:28:32,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:28:32,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94114421] [2024-06-27 16:28:32,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:28:32,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:28:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:28:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-06-27 16:28:33,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:28:33,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94114421] [2024-06-27 16:28:33,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94114421] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:28:33,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255237677] [2024-06-27 16:28:33,488 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-06-27 16:28:33,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:28:33,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:28:33,489 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) [2024-06-27 16:28:33,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-06-27 16:28:33,627 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-06-27 16:28:33,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:28:33,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 24 conjunts are in the unsatisfiable core [2024-06-27 16:28:33,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:28:33,968 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:28:33,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:28:38,600 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-06-27 16:28:38,600 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 237 [2024-06-27 16:28:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:28:44,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255237677] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:28:44,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:28:44,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 24 [2024-06-27 16:28:44,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201967736] [2024-06-27 16:28:44,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:28:44,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-06-27 16:28:44,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:28:44,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-06-27 16:28:44,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=494, Unknown=1, NotChecked=0, Total=600 [2024-06-27 16:28:44,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:28:44,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 303 transitions, 4627 flow. Second operand has 25 states, 25 states have (on average 10.24) internal successors, (256), 25 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:28:44,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:28:44,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:28:44,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:05,053 INFO L124 PetriNetUnfolderBase]: 25567/37694 cut-off events. [2024-06-27 16:29:05,053 INFO L125 PetriNetUnfolderBase]: For 233600/233600 co-relation queries the response was YES. [2024-06-27 16:29:05,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 170345 conditions, 37694 events. 25567/37694 cut-off events. For 233600/233600 co-relation queries the response was YES. Maximal size of possible extension queue 1955. Compared 263442 event pairs, 8388 based on Foata normal form. 32/37722 useless extension candidates. Maximal degree in co-relation 169767. Up to 29640 conditions per place. [2024-06-27 16:29:05,564 INFO L140 encePairwiseOnDemand]: 23/40 looper letters, 243 selfloop transitions, 193 changer transitions 49/489 dead transitions. [2024-06-27 16:29:05,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 489 transitions, 6737 flow [2024-06-27 16:29:05,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-06-27 16:29:05,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-06-27 16:29:05,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 452 transitions. [2024-06-27 16:29:05,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4185185185185185 [2024-06-27 16:29:05,565 INFO L175 Difference]: Start difference. First operand has 190 places, 303 transitions, 4627 flow. Second operand 27 states and 452 transitions. [2024-06-27 16:29:05,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 489 transitions, 6737 flow [2024-06-27 16:29:09,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 489 transitions, 6403 flow, removed 95 selfloop flow, removed 15 redundant places. [2024-06-27 16:29:09,324 INFO L231 Difference]: Finished difference. Result has 208 places, 332 transitions, 5229 flow [2024-06-27 16:29:09,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=4392, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=168, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=5229, PETRI_PLACES=208, PETRI_TRANSITIONS=332} [2024-06-27 16:29:09,324 INFO L281 CegarLoopForPetriNet]: 37 programPoint places, 171 predicate places. [2024-06-27 16:29:09,324 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 332 transitions, 5229 flow [2024-06-27 16:29:09,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 10.24) internal successors, (256), 25 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:09,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 16:29:09,325 INFO L208 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, 1, 1, 1, 1, 1] [2024-06-27 16:29:09,338 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-06-27 16:29:09,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-06-27 16:29:09,526 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-27 16:29:09,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 16:29:09,526 INFO L85 PathProgramCache]: Analyzing trace with hash 290893460, now seen corresponding path program 6 times [2024-06-27 16:29:09,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 16:29:09,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691397587] [2024-06-27 16:29:09,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 16:29:09,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 16:29:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 16:29:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 16:29:11,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 16:29:11,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691397587] [2024-06-27 16:29:11,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691397587] provided 0 perfect and 1 imperfect interpolant sequences [2024-06-27 16:29:11,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687050274] [2024-06-27 16:29:11,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-06-27 16:29:11,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-06-27 16:29:11,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 16:29:11,058 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) [2024-06-27 16:29:11,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-06-27 16:29:11,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-06-27 16:29:11,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-06-27 16:29:11,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjunts are in the unsatisfiable core [2024-06-27 16:29:11,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-06-27 16:29:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:29:12,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-06-27 16:29:12,913 INFO L349 Elim1Store]: treesize reduction 4, result has 98.3 percent of original size [2024-06-27 16:29:12,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 77 treesize of output 237 [2024-06-27 16:29:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-06-27 16:29:18,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687050274] provided 0 perfect and 2 imperfect interpolant sequences [2024-06-27 16:29:18,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-06-27 16:29:18,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 7] total 29 [2024-06-27 16:29:18,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801258622] [2024-06-27 16:29:18,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-06-27 16:29:18,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-06-27 16:29:18,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 16:29:18,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-06-27 16:29:18,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2024-06-27 16:29:18,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 40 [2024-06-27 16:29:18,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 332 transitions, 5229 flow. Second operand has 30 states, 30 states have (on average 9.733333333333333) internal successors, (292), 30 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 16:29:18,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 16:29:18,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 40 [2024-06-27 16:29:18,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 16:29:28,030 INFO L124 PetriNetUnfolderBase]: 31964/47044 cut-off events. [2024-06-27 16:29:28,031 INFO L125 PetriNetUnfolderBase]: For 295376/295384 co-relation queries the response was YES. [2024-06-27 16:29:28,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210935 conditions, 47044 events. 31964/47044 cut-off events. For 295376/295384 co-relation queries the response was YES. Maximal size of possible extension queue 2374. Compared 334712 event pairs, 10579 based on Foata normal form. 23/47055 useless extension candidates. Maximal degree in co-relation 210181. Up to 34845 conditions per place. [2024-06-27 16:29:28,806 INFO L140 encePairwiseOnDemand]: 23/40 looper letters, 322 selfloop transitions, 223 changer transitions 83/632 dead transitions. [2024-06-27 16:29:28,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 632 transitions, 8658 flow [2024-06-27 16:29:28,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-06-27 16:29:28,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-06-27 16:29:28,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 529 transitions. [2024-06-27 16:29:28,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266129032258065 [2024-06-27 16:29:28,808 INFO L175 Difference]: Start difference. First operand has 208 places, 332 transitions, 5229 flow. Second operand 31 states and 529 transitions. [2024-06-27 16:29:28,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 632 transitions, 8658 flow