./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --validate ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/circular_buffer_ok.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 80b1b132 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/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i ./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/circular_buffer_ok.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --- Real Ultimate output --- This is Ultimate 0.2.4-?-80b1b13-m [2024-01-31 17:26:30,221 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-01-31 17:26:30,275 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-01-31 17:26:30,278 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-01-31 17:26:30,279 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-01-31 17:26:30,306 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-01-31 17:26:30,307 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-01-31 17:26:30,307 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-01-31 17:26:30,308 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-01-31 17:26:30,310 INFO L153 SettingsManager]: * Use memory slicer=true [2024-01-31 17:26:30,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-01-31 17:26:30,310 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-01-31 17:26:30,310 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-01-31 17:26:30,311 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-01-31 17:26:30,311 INFO L153 SettingsManager]: * Use SBE=true [2024-01-31 17:26:30,311 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-01-31 17:26:30,311 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-01-31 17:26:30,311 INFO L153 SettingsManager]: * sizeof long=4 [2024-01-31 17:26:30,311 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-01-31 17:26:30,312 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-01-31 17:26:30,312 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-01-31 17:26:30,313 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-01-31 17:26:30,314 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-01-31 17:26:30,314 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-01-31 17:26:30,314 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-01-31 17:26:30,314 INFO L153 SettingsManager]: * sizeof long double=12 [2024-01-31 17:26:30,314 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-01-31 17:26:30,314 INFO L153 SettingsManager]: * Use constant arrays=true [2024-01-31 17:26:30,314 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-01-31 17:26:30,315 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-01-31 17:26:30,315 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-01-31 17:26:30,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-01-31 17:26:30,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:26:30,315 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-01-31 17:26:30,315 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-01-31 17:26:30,315 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-01-31 17:26:30,316 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-01-31 17:26:30,316 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-01-31 17:26:30,316 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-01-31 17:26:30,316 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-01-31 17:26:30,316 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-01-31 17:26:30,316 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-01-31 17:26:30,316 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-01-31 17:26:30,316 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false [2024-01-31 17:26:30,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-01-31 17:26:30,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-01-31 17:26:30,483 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-01-31 17:26:30,484 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-01-31 17:26:30,484 INFO L274 PluginConnector]: Witness Parser initialized [2024-01-31 17:26:30,485 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2023-12-19_14-39-08.files/SV-COMP24_unreach-call/circular_buffer_ok.yml/witness.yml [2024-01-31 17:26:30,647 INFO L270 PluginConnector]: Initializing CDTParser... [2024-01-31 17:26:30,648 INFO L274 PluginConnector]: CDTParser initialized [2024-01-31 17:26:30,648 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-01-31 17:26:31,631 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-01-31 17:26:31,826 INFO L384 CDTParser]: Found 1 translation units. [2024-01-31 17:26:31,828 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i [2024-01-31 17:26:31,846 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18ca9538c/80065fc8c11e434ba1fc4e3fc0bb0b57/FLAG66bf293ed [2024-01-31 17:26:31,856 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/18ca9538c/80065fc8c11e434ba1fc4e3fc0bb0b57 [2024-01-31 17:26:31,857 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-01-31 17:26:31,858 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-01-31 17:26:31,859 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-01-31 17:26:31,859 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-01-31 17:26:31,863 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-01-31 17:26:31,864 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:26:30" (1/2) ... [2024-01-31 17:26:31,864 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444fdacf and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:26:31, skipping insertion in model container [2024-01-31 17:26:31,864 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:26:30" (1/2) ... [2024-01-31 17:26:31,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4c65db91 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 31.01 05:26:31, skipping insertion in model container [2024-01-31 17:26:31,866 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:26:31" (2/2) ... [2024-01-31 17:26:31,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@444fdacf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:31, skipping insertion in model container [2024-01-31 17:26:31,866 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:26:31" (2/2) ... [2024-01-31 17:26:31,866 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-01-31 17:26:32,008 INFO L96 nessWitnessExtractor]: Found the following entries in the witness: [2024-01-31 17:26:32,010 INFO L98 nessWitnessExtractor]: Location invariant before [L731-L731] (((((0 <= value) && (value <= 6)) && (send == (_Bool)1)) && ((unsigned long )arg == 0UL)) && (receive == (_Bool)0 || receive == (_Bool)1)) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 6)) [2024-01-31 17:26:32,010 INFO L98 nessWitnessExtractor]: Location invariant before [L749-L749] (((((0 <= value) && (value <= 6)) && (receive == (_Bool)1)) && ((unsigned long )arg == 0UL)) && (send == (_Bool)0 || send == (_Bool)1)) && (((((i == 4 || i == 3) || i == 2) || i == 1) || (0 == i && i == 0)) || (5 <= i && i <= 6)) [2024-01-31 17:26:32,059 INFO L179 MainTranslator]: Built tables and reachable declarations [2024-01-31 17:26:32,314 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2024-01-31 17:26:32,321 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] [2024-01-31 17:26:32,330 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] [2024-01-31 17:26:32,335 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:26:32,346 INFO L204 MainTranslator]: Completed pre-run [2024-01-31 17:26:32,395 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30451,30464] [2024-01-31 17:26:32,398 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30681,30694] Start Parsing Local [2024-01-31 17:26:32,445 WARN L239 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-deagle/circular_buffer_ok.i[30979,30992] Start Parsing Local [2024-01-31 17:26:32,453 INFO L209 PostProcessor]: Analyzing one entry point: main [2024-01-31 17:26:32,482 INFO L208 MainTranslator]: Completed translation [2024-01-31 17:26:32,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32 WrapperNode [2024-01-31 17:26:32,483 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-01-31 17:26:32,484 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-01-31 17:26:32,484 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-01-31 17:26:32,484 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-01-31 17:26:32,488 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,508 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,529 INFO L138 Inliner]: procedures = 169, calls = 38, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 150 [2024-01-31 17:26:32,529 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-01-31 17:26:32,530 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-01-31 17:26:32,530 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-01-31 17:26:32,530 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-01-31 17:26:32,539 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,539 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,541 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,552 INFO L175 MemorySlicer]: Split 18 memory accesses to 6 slices as follows [2, 1, 2, 3, 8, 2]. 44 percent of accesses are in the largest equivalence class. The 11 initializations are split as follows [2, 1, 0, 0, 8, 0]. The 4 writes are split as follows [0, 0, 1, 2, 0, 1]. [2024-01-31 17:26:32,553 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,553 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,574 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,582 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,584 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,585 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,588 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-01-31 17:26:32,591 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-01-31 17:26:32,591 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-01-31 17:26:32,591 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-01-31 17:26:32,592 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (1/1) ... [2024-01-31 17:26:32,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-01-31 17:26:32,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:32,620 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) [2024-01-31 17:26:32,621 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 [2024-01-31 17:26:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-01-31 17:26:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-01-31 17:26:32,643 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-01-31 17:26:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-01-31 17:26:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#4 [2024-01-31 17:26:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#5 [2024-01-31 17:26:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2024-01-31 17:26:32,644 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2024-01-31 17:26:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2024-01-31 17:26:32,644 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2024-01-31 17:26:32,644 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-01-31 17:26:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-01-31 17:26:32,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-01-31 17:26:32,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-01-31 17:26:32,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#4 [2024-01-31 17:26:32,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#5 [2024-01-31 17:26:32,646 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-01-31 17:26:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-01-31 17:26:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-01-31 17:26:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-01-31 17:26:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-01-31 17:26:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-01-31 17:26:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-01-31 17:26:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#3 [2024-01-31 17:26:32,647 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#4 [2024-01-31 17:26:32,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#5 [2024-01-31 17:26:32,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-01-31 17:26:32,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-01-31 17:26:32,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-01-31 17:26:32,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-01-31 17:26:32,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2024-01-31 17:26:32,648 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2024-01-31 17:26:32,648 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-01-31 17:26:32,649 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-01-31 17:26:32,649 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-01-31 17:26:32,650 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-01-31 17:26:32,768 INFO L244 CfgBuilder]: Building ICFG [2024-01-31 17:26:32,770 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-01-31 17:26:33,007 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-01-31 17:26:33,007 INFO L293 CfgBuilder]: Performing block encoding [2024-01-31 17:26:33,152 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-01-31 17:26:33,152 INFO L320 CfgBuilder]: Removed 2 assume(true) statements. [2024-01-31 17:26:33,153 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:26:33 BoogieIcfgContainer [2024-01-31 17:26:33,153 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-01-31 17:26:33,156 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-01-31 17:26:33,156 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-01-31 17:26:33,158 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-01-31 17:26:33,158 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 31.01 05:26:30" (1/4) ... [2024-01-31 17:26:33,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f24b39d and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 31.01 05:26:33, skipping insertion in model container [2024-01-31 17:26:33,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:26:31" (2/4) ... [2024-01-31 17:26:33,159 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f24b39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:26:33, skipping insertion in model container [2024-01-31 17:26:33,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:26:32" (3/4) ... [2024-01-31 17:26:33,160 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f24b39d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:26:33, skipping insertion in model container [2024-01-31 17:26:33,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:26:33" (4/4) ... [2024-01-31 17:26:33,161 INFO L112 eAbstractionObserver]: Analyzing ICFG circular_buffer_ok.i [2024-01-31 17:26:33,173 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-01-31 17:26:33,173 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2024-01-31 17:26:33,173 INFO L518 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-01-31 17:26:33,283 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-01-31 17:26:33,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 50 places, 51 transitions, 116 flow [2024-01-31 17:26:33,354 INFO L124 PetriNetUnfolderBase]: 8/49 cut-off events. [2024-01-31 17:26:33,355 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-01-31 17:26:33,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 49 events. 8/49 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 125 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-01-31 17:26:33,358 INFO L82 GeneralOperation]: Start removeDead. Operand has 50 places, 51 transitions, 116 flow [2024-01-31 17:26:33,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 46 places, 47 transitions, 103 flow [2024-01-31 17:26:33,371 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-01-31 17:26:33,381 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=false, 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;@6c64bfc3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-01-31 17:26:33,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 12 error locations. [2024-01-31 17:26:33,393 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-01-31 17:26:33,393 INFO L124 PetriNetUnfolderBase]: 6/38 cut-off events. [2024-01-31 17:26:33,393 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-01-31 17:26:33,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:33,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:33,395 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:33,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:33,402 INFO L85 PathProgramCache]: Analyzing trace with hash -2037284804, now seen corresponding path program 1 times [2024-01-31 17:26:33,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:33,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252173948] [2024-01-31 17:26:33,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:33,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:33,487 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:33,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [184040835] [2024-01-31 17:26:33,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:33,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:33,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:33,491 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) [2024-01-31 17:26:33,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-01-31 17:26:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:33,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2024-01-31 17:26:33,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:33,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:33,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:33,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:33,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252173948] [2024-01-31 17:26:33,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:33,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184040835] [2024-01-31 17:26:33,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184040835] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:33,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:33,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:26:33,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139344727] [2024-01-31 17:26:33,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:33,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:26:33,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:33,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:26:33,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:26:33,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-01-31 17:26:33,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 103 flow. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:33,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:33,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-01-31 17:26:33,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:33,955 INFO L124 PetriNetUnfolderBase]: 411/814 cut-off events. [2024-01-31 17:26:33,955 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2024-01-31 17:26:33,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1499 conditions, 814 events. 411/814 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 4432 event pairs, 306 based on Foata normal form. 60/743 useless extension candidates. Maximal degree in co-relation 1398. Up to 648 conditions per place. [2024-01-31 17:26:33,964 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 27 selfloop transitions, 1 changer transitions 0/42 dead transitions. [2024-01-31 17:26:33,965 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 42 transitions, 149 flow [2024-01-31 17:26:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:26:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:26:33,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 82 transitions. [2024-01-31 17:26:33,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5359477124183006 [2024-01-31 17:26:33,976 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 103 flow. Second operand 3 states and 82 transitions. [2024-01-31 17:26:33,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 42 transitions, 149 flow [2024-01-31 17:26:33,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 42 transitions, 144 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 17:26:33,984 INFO L231 Difference]: Finished difference. Result has 43 places, 42 transitions, 90 flow [2024-01-31 17:26:33,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=90, PETRI_PLACES=43, PETRI_TRANSITIONS=42} [2024-01-31 17:26:33,988 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -3 predicate places. [2024-01-31 17:26:33,988 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 42 transitions, 90 flow [2024-01-31 17:26:33,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:33,989 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:33,989 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:34,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:34,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2024-01-31 17:26:34,203 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:34,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:34,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1118055841, now seen corresponding path program 1 times [2024-01-31 17:26:34,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:34,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121105554] [2024-01-31 17:26:34,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:34,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:34,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:34,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:34,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:34,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121105554] [2024-01-31 17:26:34,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121105554] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:34,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:34,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:26:34,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706432313] [2024-01-31 17:26:34,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:34,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:26:34,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:26:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:26:34,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-01-31 17:26:34,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 42 transitions, 90 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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) [2024-01-31 17:26:34,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:34,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-01-31 17:26:34,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:34,653 INFO L124 PetriNetUnfolderBase]: 686/1350 cut-off events. [2024-01-31 17:26:34,653 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-01-31 17:26:34,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2471 conditions, 1350 events. 686/1350 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6848 event pairs, 255 based on Foata normal form. 20/1217 useless extension candidates. Maximal degree in co-relation 2465. Up to 649 conditions per place. [2024-01-31 17:26:34,659 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 44 selfloop transitions, 3 changer transitions 3/63 dead transitions. [2024-01-31 17:26:34,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 63 transitions, 235 flow [2024-01-31 17:26:34,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:26:34,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:26:34,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 102 transitions. [2024-01-31 17:26:34,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-01-31 17:26:34,662 INFO L175 Difference]: Start difference. First operand has 43 places, 42 transitions, 90 flow. Second operand 3 states and 102 transitions. [2024-01-31 17:26:34,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 63 transitions, 235 flow [2024-01-31 17:26:34,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 63 transitions, 234 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:26:34,665 INFO L231 Difference]: Finished difference. Result has 45 places, 43 transitions, 104 flow [2024-01-31 17:26:34,665 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=45, PETRI_TRANSITIONS=43} [2024-01-31 17:26:34,666 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, -1 predicate places. [2024-01-31 17:26:34,666 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 43 transitions, 104 flow [2024-01-31 17:26:34,666 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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) [2024-01-31 17:26:34,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:34,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:34,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-01-31 17:26:34,667 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:34,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:34,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1268649144, now seen corresponding path program 1 times [2024-01-31 17:26:34,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:34,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523148224] [2024-01-31 17:26:34,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:34,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:34,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:34,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:34,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:34,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523148224] [2024-01-31 17:26:34,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523148224] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:34,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:34,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:26:34,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765320969] [2024-01-31 17:26:34,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:34,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:26:34,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:34,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:26:34,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:26:35,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-01-31 17:26:35,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 43 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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) [2024-01-31 17:26:35,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:35,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-01-31 17:26:35,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:35,214 INFO L124 PetriNetUnfolderBase]: 828/1599 cut-off events. [2024-01-31 17:26:35,214 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2024-01-31 17:26:35,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3069 conditions, 1599 events. 828/1599 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 8175 event pairs, 220 based on Foata normal form. 24/1474 useless extension candidates. Maximal degree in co-relation 3061. Up to 1053 conditions per place. [2024-01-31 17:26:35,221 INFO L140 encePairwiseOnDemand]: 44/51 looper letters, 52 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-01-31 17:26:35,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 67 transitions, 271 flow [2024-01-31 17:26:35,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-01-31 17:26:35,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-01-31 17:26:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 133 transitions. [2024-01-31 17:26:35,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5215686274509804 [2024-01-31 17:26:35,225 INFO L175 Difference]: Start difference. First operand has 45 places, 43 transitions, 104 flow. Second operand 5 states and 133 transitions. [2024-01-31 17:26:35,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 67 transitions, 271 flow [2024-01-31 17:26:35,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 67 transitions, 267 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:26:35,228 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 123 flow [2024-01-31 17:26:35,228 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=123, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2024-01-31 17:26:35,229 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2024-01-31 17:26:35,229 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 123 flow [2024-01-31 17:26:35,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 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) [2024-01-31 17:26:35,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:35,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:35,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-01-31 17:26:35,230 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:35,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:35,230 INFO L85 PathProgramCache]: Analyzing trace with hash 673418236, now seen corresponding path program 1 times [2024-01-31 17:26:35,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:35,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860068489] [2024-01-31 17:26:35,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:35,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:35,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:35,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:35,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:35,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860068489] [2024-01-31 17:26:35,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860068489] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:35,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:35,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-01-31 17:26:35,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119873074] [2024-01-31 17:26:35,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:35,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:26:35,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:35,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:26:35,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:26:35,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-01-31 17:26:35,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 123 flow. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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) [2024-01-31 17:26:35,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:35,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-01-31 17:26:35,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:35,449 INFO L124 PetriNetUnfolderBase]: 703/1431 cut-off events. [2024-01-31 17:26:35,450 INFO L125 PetriNetUnfolderBase]: For 122/122 co-relation queries the response was YES. [2024-01-31 17:26:35,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2779 conditions, 1431 events. 703/1431 cut-off events. For 122/122 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7506 event pairs, 225 based on Foata normal form. 0/1301 useless extension candidates. Maximal degree in co-relation 2769. Up to 999 conditions per place. [2024-01-31 17:26:35,456 INFO L140 encePairwiseOnDemand]: 48/51 looper letters, 39 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-01-31 17:26:35,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 55 transitions, 229 flow [2024-01-31 17:26:35,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:26:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:26:35,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-01-31 17:26:35,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5947712418300654 [2024-01-31 17:26:35,458 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 123 flow. Second operand 3 states and 91 transitions. [2024-01-31 17:26:35,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 55 transitions, 229 flow [2024-01-31 17:26:35,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 55 transitions, 223 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-01-31 17:26:35,461 INFO L231 Difference]: Finished difference. Result has 49 places, 45 transitions, 129 flow [2024-01-31 17:26:35,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=117, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=129, PETRI_PLACES=49, PETRI_TRANSITIONS=45} [2024-01-31 17:26:35,462 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 3 predicate places. [2024-01-31 17:26:35,462 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 45 transitions, 129 flow [2024-01-31 17:26:35,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 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) [2024-01-31 17:26:35,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:35,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:35,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-01-31 17:26:35,466 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t1Err2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:35,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:35,467 INFO L85 PathProgramCache]: Analyzing trace with hash -468372255, now seen corresponding path program 1 times [2024-01-31 17:26:35,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:35,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796466146] [2024-01-31 17:26:35,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:35,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:35,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:35,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1722891351] [2024-01-31 17:26:35,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:35,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:35,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:35,487 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) [2024-01-31 17:26:35,512 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-01-31 17:26:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:35,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 9 conjunts are in the unsatisfiable core [2024-01-31 17:26:35,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:35,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:35,599 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:35,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:35,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796466146] [2024-01-31 17:26:35,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:35,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722891351] [2024-01-31 17:26:35,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722891351] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:35,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:35,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:26:35,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101879749] [2024-01-31 17:26:35,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:35,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-01-31 17:26:35,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:35,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-01-31 17:26:35,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-01-31 17:26:35,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-01-31 17:26:35,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 45 transitions, 129 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-01-31 17:26:35,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:35,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-01-31 17:26:35,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:35,839 INFO L124 PetriNetUnfolderBase]: 889/1690 cut-off events. [2024-01-31 17:26:35,839 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-01-31 17:26:35,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3527 conditions, 1690 events. 889/1690 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 9000 event pairs, 297 based on Foata normal form. 0/1561 useless extension candidates. Maximal degree in co-relation 3516. Up to 721 conditions per place. [2024-01-31 17:26:35,847 INFO L140 encePairwiseOnDemand]: 45/51 looper letters, 80 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2024-01-31 17:26:35,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 99 transitions, 439 flow [2024-01-31 17:26:35,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-01-31 17:26:35,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-01-31 17:26:35,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 185 transitions. [2024-01-31 17:26:35,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045751633986928 [2024-01-31 17:26:35,849 INFO L175 Difference]: Start difference. First operand has 49 places, 45 transitions, 129 flow. Second operand 6 states and 185 transitions. [2024-01-31 17:26:35,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 99 transitions, 439 flow [2024-01-31 17:26:35,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 99 transitions, 435 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-01-31 17:26:35,852 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 153 flow [2024-01-31 17:26:35,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=153, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-01-31 17:26:35,854 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 9 predicate places. [2024-01-31 17:26:35,854 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 153 flow [2024-01-31 17:26:35,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-01-31 17:26:35,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:35,854 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] [2024-01-31 17:26:35,868 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:36,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:36,066 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:36,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:36,067 INFO L85 PathProgramCache]: Analyzing trace with hash 343810707, now seen corresponding path program 1 times [2024-01-31 17:26:36,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:36,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808332327] [2024-01-31 17:26:36,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:36,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:36,080 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:36,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [361109746] [2024-01-31 17:26:36,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:36,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:36,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:36,082 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) [2024-01-31 17:26:36,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-01-31 17:26:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:36,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 17:26:36,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:36,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-01-31 17:26:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:36,203 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:36,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:36,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808332327] [2024-01-31 17:26:36,203 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:36,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361109746] [2024-01-31 17:26:36,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [361109746] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:36,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:36,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-01-31 17:26:36,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025193125] [2024-01-31 17:26:36,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:36,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-01-31 17:26:36,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-01-31 17:26:36,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-01-31 17:26:36,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 51 [2024-01-31 17:26:36,205 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 153 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:36,205 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:36,205 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 51 [2024-01-31 17:26:36,205 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:36,309 INFO L124 PetriNetUnfolderBase]: 496/1096 cut-off events. [2024-01-31 17:26:36,309 INFO L125 PetriNetUnfolderBase]: For 151/151 co-relation queries the response was YES. [2024-01-31 17:26:36,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2447 conditions, 1096 events. 496/1096 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 5403 event pairs, 105 based on Foata normal form. 62/1086 useless extension candidates. Maximal degree in co-relation 2434. Up to 619 conditions per place. [2024-01-31 17:26:36,314 INFO L140 encePairwiseOnDemand]: 47/51 looper letters, 42 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-01-31 17:26:36,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 281 flow [2024-01-31 17:26:36,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:26:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:26:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-01-31 17:26:36,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6209150326797386 [2024-01-31 17:26:36,314 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 153 flow. Second operand 3 states and 95 transitions. [2024-01-31 17:26:36,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 281 flow [2024-01-31 17:26:36,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 60 transitions, 277 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:26:36,319 INFO L231 Difference]: Finished difference. Result has 56 places, 48 transitions, 158 flow [2024-01-31 17:26:36,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=56, PETRI_TRANSITIONS=48} [2024-01-31 17:26:36,321 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 10 predicate places. [2024-01-31 17:26:36,321 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 48 transitions, 158 flow [2024-01-31 17:26:36,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:36,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:36,321 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] [2024-01-31 17:26:36,335 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:36,534 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 [2024-01-31 17:26:36,535 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:36,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash 419422015, now seen corresponding path program 1 times [2024-01-31 17:26:36,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:36,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855195483] [2024-01-31 17:26:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:36,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:36,547 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:36,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752597256] [2024-01-31 17:26:36,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:36,548 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:36,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:36,561 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) [2024-01-31 17:26:36,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-01-31 17:26:36,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:36,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 17:26:36,675 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:36,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:36,825 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:36,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:36,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855195483] [2024-01-31 17:26:36,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:36,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752597256] [2024-01-31 17:26:36,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752597256] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:36,826 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:36,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:26:36,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916716358] [2024-01-31 17:26:36,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:36,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:26:36,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:36,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:26:36,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:26:36,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-01-31 17:26:36,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 48 transitions, 158 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:36,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:36,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-01-31 17:26:36,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:37,178 INFO L124 PetriNetUnfolderBase]: 712/1521 cut-off events. [2024-01-31 17:26:37,178 INFO L125 PetriNetUnfolderBase]: For 315/315 co-relation queries the response was YES. [2024-01-31 17:26:37,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3480 conditions, 1521 events. 712/1521 cut-off events. For 315/315 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 7329 event pairs, 95 based on Foata normal form. 58/1523 useless extension candidates. Maximal degree in co-relation 3467. Up to 661 conditions per place. [2024-01-31 17:26:37,185 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 110 selfloop transitions, 16 changer transitions 4/141 dead transitions. [2024-01-31 17:26:37,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 141 transitions, 699 flow [2024-01-31 17:26:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-01-31 17:26:37,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-01-31 17:26:37,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 302 transitions. [2024-01-31 17:26:37,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5383244206773619 [2024-01-31 17:26:37,186 INFO L175 Difference]: Start difference. First operand has 56 places, 48 transitions, 158 flow. Second operand 11 states and 302 transitions. [2024-01-31 17:26:37,186 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 141 transitions, 699 flow [2024-01-31 17:26:37,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 141 transitions, 675 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-01-31 17:26:37,189 INFO L231 Difference]: Finished difference. Result has 71 places, 60 transitions, 283 flow [2024-01-31 17:26:37,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=283, PETRI_PLACES=71, PETRI_TRANSITIONS=60} [2024-01-31 17:26:37,190 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 25 predicate places. [2024-01-31 17:26:37,190 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 60 transitions, 283 flow [2024-01-31 17:26:37,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:37,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:37,190 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] [2024-01-31 17:26:37,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:37,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:37,405 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:37,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1646979263, now seen corresponding path program 2 times [2024-01-31 17:26:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:37,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722281006] [2024-01-31 17:26:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:37,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:37,417 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:37,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [100832888] [2024-01-31 17:26:37,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:26:37,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:37,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:37,419 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) [2024-01-31 17:26:37,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-01-31 17:26:37,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 17:26:37,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:37,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 17:26:37,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:37,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:37,748 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:37,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:37,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722281006] [2024-01-31 17:26:37,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:37,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100832888] [2024-01-31 17:26:37,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100832888] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:37,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:37,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:26:37,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421909841] [2024-01-31 17:26:37,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:37,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:26:37,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:37,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:26:37,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:26:37,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-01-31 17:26:37,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 60 transitions, 283 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:37,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:37,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-01-31 17:26:37,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:38,139 INFO L124 PetriNetUnfolderBase]: 858/1851 cut-off events. [2024-01-31 17:26:38,139 INFO L125 PetriNetUnfolderBase]: For 1801/1803 co-relation queries the response was YES. [2024-01-31 17:26:38,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4942 conditions, 1851 events. 858/1851 cut-off events. For 1801/1803 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 9704 event pairs, 295 based on Foata normal form. 44/1825 useless extension candidates. Maximal degree in co-relation 4921. Up to 1192 conditions per place. [2024-01-31 17:26:38,148 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 91 selfloop transitions, 18 changer transitions 1/121 dead transitions. [2024-01-31 17:26:38,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 121 transitions, 770 flow [2024-01-31 17:26:38,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:26:38,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:26:38,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 235 transitions. [2024-01-31 17:26:38,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5119825708061002 [2024-01-31 17:26:38,149 INFO L175 Difference]: Start difference. First operand has 71 places, 60 transitions, 283 flow. Second operand 9 states and 235 transitions. [2024-01-31 17:26:38,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 121 transitions, 770 flow [2024-01-31 17:26:38,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 121 transitions, 761 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-01-31 17:26:38,156 INFO L231 Difference]: Finished difference. Result has 84 places, 77 transitions, 459 flow [2024-01-31 17:26:38,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=459, PETRI_PLACES=84, PETRI_TRANSITIONS=77} [2024-01-31 17:26:38,158 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 38 predicate places. [2024-01-31 17:26:38,158 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 77 transitions, 459 flow [2024-01-31 17:26:38,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:38,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:38,158 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] [2024-01-31 17:26:38,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:38,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:38,370 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:38,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:38,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1851249215, now seen corresponding path program 3 times [2024-01-31 17:26:38,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:38,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468310392] [2024-01-31 17:26:38,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:38,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:38,383 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:38,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [664851312] [2024-01-31 17:26:38,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:26:38,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:38,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:38,385 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) [2024-01-31 17:26:38,404 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-01-31 17:26:38,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 17:26:38,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:38,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:26:38,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:38,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:38,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468310392] [2024-01-31 17:26:38,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:38,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664851312] [2024-01-31 17:26:38,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664851312] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:38,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:38,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:26:38,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525751175] [2024-01-31 17:26:38,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:38,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:26:38,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:38,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:26:38,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:26:38,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-01-31 17:26:38,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 77 transitions, 459 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 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) [2024-01-31 17:26:38,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:38,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-01-31 17:26:38,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:39,040 INFO L124 PetriNetUnfolderBase]: 1010/2209 cut-off events. [2024-01-31 17:26:39,040 INFO L125 PetriNetUnfolderBase]: For 5735/5741 co-relation queries the response was YES. [2024-01-31 17:26:39,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6888 conditions, 2209 events. 1010/2209 cut-off events. For 5735/5741 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 12446 event pairs, 324 based on Foata normal form. 30/2157 useless extension candidates. Maximal degree in co-relation 6860. Up to 1390 conditions per place. [2024-01-31 17:26:39,052 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 108 selfloop transitions, 20 changer transitions 3/142 dead transitions. [2024-01-31 17:26:39,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 142 transitions, 1072 flow [2024-01-31 17:26:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:26:39,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:26:39,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 230 transitions. [2024-01-31 17:26:39,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5010893246187363 [2024-01-31 17:26:39,054 INFO L175 Difference]: Start difference. First operand has 84 places, 77 transitions, 459 flow. Second operand 9 states and 230 transitions. [2024-01-31 17:26:39,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 142 transitions, 1072 flow [2024-01-31 17:26:39,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 142 transitions, 1062 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-01-31 17:26:39,064 INFO L231 Difference]: Finished difference. Result has 98 places, 90 transitions, 648 flow [2024-01-31 17:26:39,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=455, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=648, PETRI_PLACES=98, PETRI_TRANSITIONS=90} [2024-01-31 17:26:39,077 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 52 predicate places. [2024-01-31 17:26:39,077 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 90 transitions, 648 flow [2024-01-31 17:26:39,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 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) [2024-01-31 17:26:39,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:39,077 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] [2024-01-31 17:26:39,092 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:39,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:39,290 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:39,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:39,290 INFO L85 PathProgramCache]: Analyzing trace with hash -151503785, now seen corresponding path program 4 times [2024-01-31 17:26:39,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:39,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008183406] [2024-01-31 17:26:39,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:39,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:39,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:39,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395725197] [2024-01-31 17:26:39,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:26:39,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:39,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:39,305 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) [2024-01-31 17:26:39,308 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-01-31 17:26:39,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:26:39,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:39,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 23 conjunts are in the unsatisfiable core [2024-01-31 17:26:39,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:39,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:39,556 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:39,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:39,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008183406] [2024-01-31 17:26:39,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:39,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395725197] [2024-01-31 17:26:39,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395725197] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:39,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:39,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:26:39,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868802029] [2024-01-31 17:26:39,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:39,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:26:39,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:26:39,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:26:39,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-01-31 17:26:39,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 90 transitions, 648 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:39,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:39,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-01-31 17:26:39,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:39,979 INFO L124 PetriNetUnfolderBase]: 1112/2431 cut-off events. [2024-01-31 17:26:39,980 INFO L125 PetriNetUnfolderBase]: For 10266/10274 co-relation queries the response was YES. [2024-01-31 17:26:39,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8247 conditions, 2431 events. 1112/2431 cut-off events. For 10266/10274 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 14221 event pairs, 321 based on Foata normal form. 32/2375 useless extension candidates. Maximal degree in co-relation 8211. Up to 1576 conditions per place. [2024-01-31 17:26:39,997 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 112 selfloop transitions, 21 changer transitions 2/146 dead transitions. [2024-01-31 17:26:39,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 146 transitions, 1237 flow [2024-01-31 17:26:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:26:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:26:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 234 transitions. [2024-01-31 17:26:39,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5098039215686274 [2024-01-31 17:26:39,999 INFO L175 Difference]: Start difference. First operand has 98 places, 90 transitions, 648 flow. Second operand 9 states and 234 transitions. [2024-01-31 17:26:39,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 146 transitions, 1237 flow [2024-01-31 17:26:40,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 146 transitions, 1208 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-01-31 17:26:40,015 INFO L231 Difference]: Finished difference. Result has 110 places, 101 transitions, 819 flow [2024-01-31 17:26:40,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=621, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=819, PETRI_PLACES=110, PETRI_TRANSITIONS=101} [2024-01-31 17:26:40,016 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 64 predicate places. [2024-01-31 17:26:40,017 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 101 transitions, 819 flow [2024-01-31 17:26:40,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:40,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:40,017 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] [2024-01-31 17:26:40,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:40,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:40,229 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:40,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:40,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1926936523, now seen corresponding path program 5 times [2024-01-31 17:26:40,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:40,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868753041] [2024-01-31 17:26:40,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:40,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:40,240 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:40,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228547029] [2024-01-31 17:26:40,241 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:26:40,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:40,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:40,242 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) [2024-01-31 17:26:40,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-01-31 17:26:40,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 17:26:40,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:40,393 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:26:40,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:40,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:40,540 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:40,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:40,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868753041] [2024-01-31 17:26:40,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:40,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228547029] [2024-01-31 17:26:40,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228547029] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:40,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:40,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:26:40,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54760099] [2024-01-31 17:26:40,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:40,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:26:40,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:40,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:26:40,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:26:40,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-01-31 17:26:40,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 101 transitions, 819 flow. Second operand has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 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) [2024-01-31 17:26:40,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:40,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-01-31 17:26:40,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:41,073 INFO L124 PetriNetUnfolderBase]: 1286/2795 cut-off events. [2024-01-31 17:26:41,074 INFO L125 PetriNetUnfolderBase]: For 18482/18493 co-relation queries the response was YES. [2024-01-31 17:26:41,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10376 conditions, 2795 events. 1286/2795 cut-off events. For 18482/18493 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 17161 event pairs, 304 based on Foata normal form. 39/2727 useless extension candidates. Maximal degree in co-relation 10333. Up to 1608 conditions per place. [2024-01-31 17:26:41,095 INFO L140 encePairwiseOnDemand]: 40/51 looper letters, 138 selfloop transitions, 31 changer transitions 3/183 dead transitions. [2024-01-31 17:26:41,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 183 transitions, 1721 flow [2024-01-31 17:26:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 17:26:41,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 17:26:41,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-01-31 17:26:41,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5254901960784314 [2024-01-31 17:26:41,097 INFO L175 Difference]: Start difference. First operand has 110 places, 101 transitions, 819 flow. Second operand 10 states and 268 transitions. [2024-01-31 17:26:41,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 183 transitions, 1721 flow [2024-01-31 17:26:41,119 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 183 transitions, 1681 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-01-31 17:26:41,122 INFO L231 Difference]: Finished difference. Result has 122 places, 111 transitions, 1018 flow [2024-01-31 17:26:41,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=779, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1018, PETRI_PLACES=122, PETRI_TRANSITIONS=111} [2024-01-31 17:26:41,123 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 76 predicate places. [2024-01-31 17:26:41,123 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 111 transitions, 1018 flow [2024-01-31 17:26:41,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.125) internal successors, (129), 8 states have internal predecessors, (129), 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) [2024-01-31 17:26:41,123 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:41,123 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] [2024-01-31 17:26:41,138 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:41,335 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,SelfDestructingSolverStorable10 [2024-01-31 17:26:41,335 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:41,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:41,336 INFO L85 PathProgramCache]: Analyzing trace with hash -1099965463, now seen corresponding path program 6 times [2024-01-31 17:26:41,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:41,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647022605] [2024-01-31 17:26:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:41,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:41,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:41,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1904917865] [2024-01-31 17:26:41,348 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:26:41,348 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:41,349 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:41,349 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) [2024-01-31 17:26:41,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-01-31 17:26:41,530 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2024-01-31 17:26:41,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:41,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 17:26:41,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:41,664 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:41,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:41,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647022605] [2024-01-31 17:26:41,665 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:41,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904917865] [2024-01-31 17:26:41,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904917865] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:41,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:41,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:26:41,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126853936] [2024-01-31 17:26:41,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:41,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:26:41,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:26:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:26:41,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-01-31 17:26:41,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 111 transitions, 1018 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:41,722 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:41,722 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-01-31 17:26:41,722 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:42,189 INFO L124 PetriNetUnfolderBase]: 1430/3123 cut-off events. [2024-01-31 17:26:42,190 INFO L125 PetriNetUnfolderBase]: For 26562/26573 co-relation queries the response was YES. [2024-01-31 17:26:42,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12238 conditions, 3123 events. 1430/3123 cut-off events. For 26562/26573 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 19951 event pairs, 369 based on Foata normal form. 25/3025 useless extension candidates. Maximal degree in co-relation 12190. Up to 1584 conditions per place. [2024-01-31 17:26:42,209 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 142 selfloop transitions, 31 changer transitions 5/189 dead transitions. [2024-01-31 17:26:42,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 189 transitions, 1966 flow [2024-01-31 17:26:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 17:26:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 17:26:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 274 transitions. [2024-01-31 17:26:42,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372549019607843 [2024-01-31 17:26:42,210 INFO L175 Difference]: Start difference. First operand has 122 places, 111 transitions, 1018 flow. Second operand 10 states and 274 transitions. [2024-01-31 17:26:42,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 189 transitions, 1966 flow [2024-01-31 17:26:42,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 189 transitions, 1885 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-01-31 17:26:42,243 INFO L231 Difference]: Finished difference. Result has 132 places, 118 transitions, 1165 flow [2024-01-31 17:26:42,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1165, PETRI_PLACES=132, PETRI_TRANSITIONS=118} [2024-01-31 17:26:42,243 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 86 predicate places. [2024-01-31 17:26:42,243 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 118 transitions, 1165 flow [2024-01-31 17:26:42,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:42,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:42,244 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] [2024-01-31 17:26:42,258 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:42,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:42,458 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:42,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:42,459 INFO L85 PathProgramCache]: Analyzing trace with hash 801713601, now seen corresponding path program 7 times [2024-01-31 17:26:42,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:42,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703431097] [2024-01-31 17:26:42,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:42,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:42,472 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:42,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411507479] [2024-01-31 17:26:42,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-01-31 17:26:42,473 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:42,473 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:42,473 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) [2024-01-31 17:26:42,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-01-31 17:26:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:42,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 17:26:42,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:42,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:42,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:42,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703431097] [2024-01-31 17:26:42,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:42,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411507479] [2024-01-31 17:26:42,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411507479] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:42,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:42,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:26:42,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993815970] [2024-01-31 17:26:42,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:42,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:26:42,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:42,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:26:42,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:26:42,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-01-31 17:26:42,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 118 transitions, 1165 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-01-31 17:26:42,724 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:42,724 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-01-31 17:26:42,724 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:43,194 INFO L124 PetriNetUnfolderBase]: 1552/3337 cut-off events. [2024-01-31 17:26:43,194 INFO L125 PetriNetUnfolderBase]: For 31633/31643 co-relation queries the response was YES. [2024-01-31 17:26:43,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13476 conditions, 3337 events. 1552/3337 cut-off events. For 31633/31643 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 21502 event pairs, 601 based on Foata normal form. 38/3222 useless extension candidates. Maximal degree in co-relation 13422. Up to 1657 conditions per place. [2024-01-31 17:26:43,215 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 137 selfloop transitions, 46 changer transitions 0/194 dead transitions. [2024-01-31 17:26:43,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 194 transitions, 2102 flow [2024-01-31 17:26:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:26:43,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:26:43,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 223 transitions. [2024-01-31 17:26:43,218 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6246498599439776 [2024-01-31 17:26:43,218 INFO L175 Difference]: Start difference. First operand has 132 places, 118 transitions, 1165 flow. Second operand 7 states and 223 transitions. [2024-01-31 17:26:43,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 194 transitions, 2102 flow [2024-01-31 17:26:43,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 194 transitions, 2059 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-01-31 17:26:43,265 INFO L231 Difference]: Finished difference. Result has 139 places, 128 transitions, 1439 flow [2024-01-31 17:26:43,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1439, PETRI_PLACES=139, PETRI_TRANSITIONS=128} [2024-01-31 17:26:43,266 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 93 predicate places. [2024-01-31 17:26:43,266 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 128 transitions, 1439 flow [2024-01-31 17:26:43,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-01-31 17:26:43,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:43,266 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] [2024-01-31 17:26:43,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-01-31 17:26:43,478 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,SelfDestructingSolverStorable12 [2024-01-31 17:26:43,478 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:43,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:43,478 INFO L85 PathProgramCache]: Analyzing trace with hash 1050465879, now seen corresponding path program 8 times [2024-01-31 17:26:43,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:43,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637328231] [2024-01-31 17:26:43,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:43,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:43,490 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:43,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1239481678] [2024-01-31 17:26:43,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:26:43,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:43,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:43,492 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) [2024-01-31 17:26:43,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-01-31 17:26:43,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-01-31 17:26:43,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:43,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2024-01-31 17:26:43,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:43,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:43,718 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:43,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:43,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637328231] [2024-01-31 17:26:43,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:43,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239481678] [2024-01-31 17:26:43,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239481678] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:43,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:43,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:26:43,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497957069] [2024-01-31 17:26:43,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:43,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:26:43,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:43,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:26:43,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:26:43,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-01-31 17:26:43,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 128 transitions, 1439 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-01-31 17:26:43,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:43,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-01-31 17:26:43,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:44,377 INFO L124 PetriNetUnfolderBase]: 1611/3526 cut-off events. [2024-01-31 17:26:44,377 INFO L125 PetriNetUnfolderBase]: For 39840/39850 co-relation queries the response was YES. [2024-01-31 17:26:44,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14901 conditions, 3526 events. 1611/3526 cut-off events. For 39840/39850 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 23456 event pairs, 561 based on Foata normal form. 24/3403 useless extension candidates. Maximal degree in co-relation 14843. Up to 1360 conditions per place. [2024-01-31 17:26:44,399 INFO L140 encePairwiseOnDemand]: 43/51 looper letters, 146 selfloop transitions, 47 changer transitions 2/206 dead transitions. [2024-01-31 17:26:44,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 206 transitions, 2432 flow [2024-01-31 17:26:44,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-01-31 17:26:44,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-01-31 17:26:44,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 243 transitions. [2024-01-31 17:26:44,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5955882352941176 [2024-01-31 17:26:44,401 INFO L175 Difference]: Start difference. First operand has 139 places, 128 transitions, 1439 flow. Second operand 8 states and 243 transitions. [2024-01-31 17:26:44,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 206 transitions, 2432 flow [2024-01-31 17:26:44,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 206 transitions, 2372 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-01-31 17:26:44,463 INFO L231 Difference]: Finished difference. Result has 150 places, 133 transitions, 1640 flow [2024-01-31 17:26:44,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1640, PETRI_PLACES=150, PETRI_TRANSITIONS=133} [2024-01-31 17:26:44,464 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 104 predicate places. [2024-01-31 17:26:44,464 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 133 transitions, 1640 flow [2024-01-31 17:26:44,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-01-31 17:26:44,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:44,464 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] [2024-01-31 17:26:44,475 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:44,675 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,SelfDestructingSolverStorable13 [2024-01-31 17:26:44,676 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:44,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:44,676 INFO L85 PathProgramCache]: Analyzing trace with hash 613176787, now seen corresponding path program 9 times [2024-01-31 17:26:44,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:44,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379329955] [2024-01-31 17:26:44,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:44,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:44,688 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:44,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [627912243] [2024-01-31 17:26:44,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:26:44,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:44,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:44,690 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) [2024-01-31 17:26:44,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-01-31 17:26:44,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-01-31 17:26:44,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:44,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 22 conjunts are in the unsatisfiable core [2024-01-31 17:26:44,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:44,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:44,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:44,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:44,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379329955] [2024-01-31 17:26:44,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:44,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627912243] [2024-01-31 17:26:44,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627912243] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:44,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:44,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-01-31 17:26:44,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081869976] [2024-01-31 17:26:44,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:44,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-01-31 17:26:44,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:44,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-01-31 17:26:44,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-01-31 17:26:45,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-01-31 17:26:45,026 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 133 transitions, 1640 flow. Second operand has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-01-31 17:26:45,026 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:45,026 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-01-31 17:26:45,026 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:45,619 INFO L124 PetriNetUnfolderBase]: 1703/3772 cut-off events. [2024-01-31 17:26:45,619 INFO L125 PetriNetUnfolderBase]: For 51323/51331 co-relation queries the response was YES. [2024-01-31 17:26:45,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16214 conditions, 3772 events. 1703/3772 cut-off events. For 51323/51331 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 25942 event pairs, 811 based on Foata normal form. 36/3654 useless extension candidates. Maximal degree in co-relation 16151. Up to 2397 conditions per place. [2024-01-31 17:26:45,640 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 157 selfloop transitions, 29 changer transitions 0/197 dead transitions. [2024-01-31 17:26:45,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 197 transitions, 2525 flow [2024-01-31 17:26:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-01-31 17:26:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-01-31 17:26:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 211 transitions. [2024-01-31 17:26:45,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5910364145658263 [2024-01-31 17:26:45,643 INFO L175 Difference]: Start difference. First operand has 150 places, 133 transitions, 1640 flow. Second operand 7 states and 211 transitions. [2024-01-31 17:26:45,643 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 197 transitions, 2525 flow [2024-01-31 17:26:45,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 197 transitions, 2415 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-01-31 17:26:45,713 INFO L231 Difference]: Finished difference. Result has 156 places, 142 transitions, 1819 flow [2024-01-31 17:26:45,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1554, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1819, PETRI_PLACES=156, PETRI_TRANSITIONS=142} [2024-01-31 17:26:45,713 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 110 predicate places. [2024-01-31 17:26:45,713 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 142 transitions, 1819 flow [2024-01-31 17:26:45,713 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.833333333333332) internal successors, (107), 6 states have internal predecessors, (107), 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) [2024-01-31 17:26:45,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:45,714 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] [2024-01-31 17:26:45,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:45,925 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,SelfDestructingSolverStorable14 [2024-01-31 17:26:45,926 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:45,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:45,926 INFO L85 PathProgramCache]: Analyzing trace with hash 599779967, now seen corresponding path program 10 times [2024-01-31 17:26:45,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:45,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197620463] [2024-01-31 17:26:45,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:45,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:45,938 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:45,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286403923] [2024-01-31 17:26:45,939 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:26:45,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:45,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:45,940 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) [2024-01-31 17:26:45,941 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-01-31 17:26:46,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:26:46,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:46,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 31 conjunts are in the unsatisfiable core [2024-01-31 17:26:46,069 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:46,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:46,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:46,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:46,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197620463] [2024-01-31 17:26:46,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:46,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286403923] [2024-01-31 17:26:46,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286403923] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:46,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:46,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-01-31 17:26:46,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567590136] [2024-01-31 17:26:46,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:46,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:26:46,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:46,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:26:46,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:26:46,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 51 [2024-01-31 17:26:46,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 142 transitions, 1819 flow. Second operand has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:46,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:46,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 51 [2024-01-31 17:26:46,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:46,867 INFO L124 PetriNetUnfolderBase]: 1748/3885 cut-off events. [2024-01-31 17:26:46,868 INFO L125 PetriNetUnfolderBase]: For 54807/54816 co-relation queries the response was YES. [2024-01-31 17:26:46,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16859 conditions, 3885 events. 1748/3885 cut-off events. For 54807/54816 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 26958 event pairs, 441 based on Foata normal form. 23/3747 useless extension candidates. Maximal degree in co-relation 16794. Up to 1990 conditions per place. [2024-01-31 17:26:46,895 INFO L140 encePairwiseOnDemand]: 41/51 looper letters, 161 selfloop transitions, 36 changer transitions 4/212 dead transitions. [2024-01-31 17:26:46,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 212 transitions, 2841 flow [2024-01-31 17:26:46,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-01-31 17:26:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-01-31 17:26:46,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 269 transitions. [2024-01-31 17:26:46,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5274509803921569 [2024-01-31 17:26:46,896 INFO L175 Difference]: Start difference. First operand has 156 places, 142 transitions, 1819 flow. Second operand 10 states and 269 transitions. [2024-01-31 17:26:46,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 212 transitions, 2841 flow [2024-01-31 17:26:46,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 212 transitions, 2764 flow, removed 30 selfloop flow, removed 1 redundant places. [2024-01-31 17:26:46,977 INFO L231 Difference]: Finished difference. Result has 168 places, 146 transitions, 1940 flow [2024-01-31 17:26:46,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1746, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1940, PETRI_PLACES=168, PETRI_TRANSITIONS=146} [2024-01-31 17:26:46,977 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 122 predicate places. [2024-01-31 17:26:46,977 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 146 transitions, 1940 flow [2024-01-31 17:26:46,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.125) internal successors, (137), 8 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-01-31 17:26:46,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:46,978 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] [2024-01-31 17:26:46,991 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:47,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-01-31 17:26:47,192 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting t2Err1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:47,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:47,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1554150365, now seen corresponding path program 1 times [2024-01-31 17:26:47,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:47,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015666143] [2024-01-31 17:26:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:47,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:47,203 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:47,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1871207843] [2024-01-31 17:26:47,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:47,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:47,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:47,205 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:26:47,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-01-31 17:26:47,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:47,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 25 conjunts are in the unsatisfiable core [2024-01-31 17:26:47,366 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:47,373 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 6 [2024-01-31 17:26:47,447 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-01-31 17:26:47,530 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2024-01-31 17:26:47,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:47,537 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:47,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:47,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015666143] [2024-01-31 17:26:47,537 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:47,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871207843] [2024-01-31 17:26:47,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871207843] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:47,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:47,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-01-31 17:26:47,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318306375] [2024-01-31 17:26:47,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:47,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-01-31 17:26:47,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:47,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-01-31 17:26:47,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-01-31 17:26:47,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 51 [2024-01-31 17:26:47,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 146 transitions, 1940 flow. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 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) [2024-01-31 17:26:47,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:47,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 51 [2024-01-31 17:26:47,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:48,081 INFO L124 PetriNetUnfolderBase]: 1528/3281 cut-off events. [2024-01-31 17:26:48,081 INFO L125 PetriNetUnfolderBase]: For 49713/49722 co-relation queries the response was YES. [2024-01-31 17:26:48,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15252 conditions, 3281 events. 1528/3281 cut-off events. For 49713/49722 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 20823 event pairs, 185 based on Foata normal form. 3/3226 useless extension candidates. Maximal degree in co-relation 15181. Up to 1065 conditions per place. [2024-01-31 17:26:48,105 INFO L140 encePairwiseOnDemand]: 42/51 looper letters, 161 selfloop transitions, 39 changer transitions 12/226 dead transitions. [2024-01-31 17:26:48,105 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 226 transitions, 3427 flow [2024-01-31 17:26:48,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-01-31 17:26:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-01-31 17:26:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 243 transitions. [2024-01-31 17:26:48,106 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2024-01-31 17:26:48,106 INFO L175 Difference]: Start difference. First operand has 168 places, 146 transitions, 1940 flow. Second operand 9 states and 243 transitions. [2024-01-31 17:26:48,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 226 transitions, 3427 flow [2024-01-31 17:26:48,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 226 transitions, 3198 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-01-31 17:26:48,179 INFO L231 Difference]: Finished difference. Result has 170 places, 162 transitions, 2151 flow [2024-01-31 17:26:48,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2151, PETRI_PLACES=170, PETRI_TRANSITIONS=162} [2024-01-31 17:26:48,179 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 124 predicate places. [2024-01-31 17:26:48,179 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 162 transitions, 2151 flow [2024-01-31 17:26:48,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 8 states have internal predecessors, (152), 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) [2024-01-31 17:26:48,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:48,180 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:48,191 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:48,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:48,388 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting t1Err1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:48,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:48,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1851673674, now seen corresponding path program 1 times [2024-01-31 17:26:48,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:48,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085495147] [2024-01-31 17:26:48,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:48,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:48,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:48,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1613559582] [2024-01-31 17:26:48,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:48,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:48,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:48,400 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:26:48,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-01-31 17:26:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:48,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2024-01-31 17:26:48,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:48,600 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:48,600 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-01-31 17:26:48,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:48,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085495147] [2024-01-31 17:26:48,600 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:48,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613559582] [2024-01-31 17:26:48,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613559582] provided 1 perfect and 0 imperfect interpolant sequences [2024-01-31 17:26:48,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-01-31 17:26:48,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-01-31 17:26:48,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67092869] [2024-01-31 17:26:48,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-01-31 17:26:48,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-01-31 17:26:48,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:48,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-01-31 17:26:48,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-01-31 17:26:48,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 51 [2024-01-31 17:26:48,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 162 transitions, 2151 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2024-01-31 17:26:48,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:48,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 51 [2024-01-31 17:26:48,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:48,984 INFO L124 PetriNetUnfolderBase]: 1501/3176 cut-off events. [2024-01-31 17:26:48,984 INFO L125 PetriNetUnfolderBase]: For 46204/46220 co-relation queries the response was YES. [2024-01-31 17:26:48,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14901 conditions, 3176 events. 1501/3176 cut-off events. For 46204/46220 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 20049 event pairs, 889 based on Foata normal form. 11/3153 useless extension candidates. Maximal degree in co-relation 14832. Up to 2708 conditions per place. [2024-01-31 17:26:49,005 INFO L140 encePairwiseOnDemand]: 49/51 looper letters, 143 selfloop transitions, 1 changer transitions 1/155 dead transitions. [2024-01-31 17:26:49,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 155 transitions, 2420 flow [2024-01-31 17:26:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-01-31 17:26:49,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-01-31 17:26:49,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-01-31 17:26:49,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49673202614379086 [2024-01-31 17:26:49,006 INFO L175 Difference]: Start difference. First operand has 170 places, 162 transitions, 2151 flow. Second operand 3 states and 76 transitions. [2024-01-31 17:26:49,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 155 transitions, 2420 flow [2024-01-31 17:26:49,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 155 transitions, 2390 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-01-31 17:26:49,077 INFO L231 Difference]: Finished difference. Result has 162 places, 154 transitions, 2054 flow [2024-01-31 17:26:49,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=2054, PETRI_PLACES=162, PETRI_TRANSITIONS=154} [2024-01-31 17:26:49,078 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 116 predicate places. [2024-01-31 17:26:49,078 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 154 transitions, 2054 flow [2024-01-31 17:26:49,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 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) [2024-01-31 17:26:49,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:49,078 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:49,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-01-31 17:26:49,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-01-31 17:26:49,284 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:49,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:49,285 INFO L85 PathProgramCache]: Analyzing trace with hash 434394273, now seen corresponding path program 1 times [2024-01-31 17:26:49,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:49,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243985684] [2024-01-31 17:26:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:49,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:49,303 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:49,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826525672] [2024-01-31 17:26:49,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:49,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:49,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:49,304 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:26:49,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-01-31 17:26:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-01-31 17:26:49,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 28 conjunts are in the unsatisfiable core [2024-01-31 17:26:49,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:49,817 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:49,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:26:50,745 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:50,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:50,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243985684] [2024-01-31 17:26:50,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:50,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826525672] [2024-01-31 17:26:50,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826525672] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:26:50,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:26:50,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2024-01-31 17:26:50,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374233247] [2024-01-31 17:26:50,746 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-31 17:26:50,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:26:50,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:50,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:26:50,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:26:50,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-01-31 17:26:50,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 154 transitions, 2054 flow. Second operand has 15 states, 15 states have (on average 17.933333333333334) internal successors, (269), 15 states have internal predecessors, (269), 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) [2024-01-31 17:26:50,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:50,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-01-31 17:26:50,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:26:53,763 INFO L124 PetriNetUnfolderBase]: 3308/7333 cut-off events. [2024-01-31 17:26:53,763 INFO L125 PetriNetUnfolderBase]: For 34159/34165 co-relation queries the response was YES. [2024-01-31 17:26:53,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25932 conditions, 7333 events. 3308/7333 cut-off events. For 34159/34165 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 54222 event pairs, 390 based on Foata normal form. 414/7638 useless extension candidates. Maximal degree in co-relation 25863. Up to 1373 conditions per place. [2024-01-31 17:26:53,831 INFO L140 encePairwiseOnDemand]: 38/51 looper letters, 411 selfloop transitions, 260 changer transitions 0/679 dead transitions. [2024-01-31 17:26:53,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 679 transitions, 6869 flow [2024-01-31 17:26:53,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-01-31 17:26:53,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-01-31 17:26:53,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 1112 transitions. [2024-01-31 17:26:53,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5318029650884745 [2024-01-31 17:26:53,846 INFO L175 Difference]: Start difference. First operand has 162 places, 154 transitions, 2054 flow. Second operand 41 states and 1112 transitions. [2024-01-31 17:26:53,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 679 transitions, 6869 flow [2024-01-31 17:26:53,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 679 transitions, 6635 flow, removed 87 selfloop flow, removed 6 redundant places. [2024-01-31 17:26:54,019 INFO L231 Difference]: Finished difference. Result has 223 places, 335 transitions, 4882 flow [2024-01-31 17:26:54,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=1959, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=4882, PETRI_PLACES=223, PETRI_TRANSITIONS=335} [2024-01-31 17:26:54,020 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 177 predicate places. [2024-01-31 17:26:54,020 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 335 transitions, 4882 flow [2024-01-31 17:26:54,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.933333333333334) internal successors, (269), 15 states have internal predecessors, (269), 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) [2024-01-31 17:26:54,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:26:54,020 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:26:54,035 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-01-31 17:26:54,220 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:54,221 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:26:54,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:26:54,221 INFO L85 PathProgramCache]: Analyzing trace with hash -1100133539, now seen corresponding path program 2 times [2024-01-31 17:26:54,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:26:54,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900714905] [2024-01-31 17:26:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:26:54,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:26:54,234 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:26:54,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [772674383] [2024-01-31 17:26:54,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-01-31 17:26:54,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:26:54,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:26:54,236 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:26:54,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-01-31 17:26:54,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:26:54,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:26:54,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:26:54,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:26:54,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:54,722 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:26:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:26:55,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:26:55,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900714905] [2024-01-31 17:26:55,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:26:55,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772674383] [2024-01-31 17:26:55,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772674383] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:26:55,617 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:26:55,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2024-01-31 17:26:55,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203892053] [2024-01-31 17:26:55,617 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-31 17:26:55,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:26:55,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:26:55,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:26:55,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:26:55,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-01-31 17:26:55,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 335 transitions, 4882 flow. Second operand has 17 states, 17 states have (on average 16.705882352941178) internal successors, (284), 17 states have internal predecessors, (284), 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) [2024-01-31 17:26:55,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:26:55,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-01-31 17:26:55,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:27:01,881 INFO L124 PetriNetUnfolderBase]: 8162/16663 cut-off events. [2024-01-31 17:27:01,882 INFO L125 PetriNetUnfolderBase]: For 190388/190398 co-relation queries the response was YES. [2024-01-31 17:27:02,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73116 conditions, 16663 events. 8162/16663 cut-off events. For 190388/190398 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 135526 event pairs, 652 based on Foata normal form. 106/16524 useless extension candidates. Maximal degree in co-relation 73023. Up to 2907 conditions per place. [2024-01-31 17:27:02,205 INFO L140 encePairwiseOnDemand]: 36/51 looper letters, 559 selfloop transitions, 568 changer transitions 56/1190 dead transitions. [2024-01-31 17:27:02,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 1190 transitions, 15228 flow [2024-01-31 17:27:02,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-01-31 17:27:02,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-01-31 17:27:02,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1158 transitions. [2024-01-31 17:27:02,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4831038798498123 [2024-01-31 17:27:02,208 INFO L175 Difference]: Start difference. First operand has 223 places, 335 transitions, 4882 flow. Second operand 47 states and 1158 transitions. [2024-01-31 17:27:02,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 1190 transitions, 15228 flow [2024-01-31 17:27:03,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 1190 transitions, 13709 flow, removed 651 selfloop flow, removed 9 redundant places. [2024-01-31 17:27:03,036 INFO L231 Difference]: Finished difference. Result has 299 places, 745 transitions, 10948 flow [2024-01-31 17:27:03,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=4208, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=335, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=215, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=10948, PETRI_PLACES=299, PETRI_TRANSITIONS=745} [2024-01-31 17:27:03,037 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 253 predicate places. [2024-01-31 17:27:03,037 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 745 transitions, 10948 flow [2024-01-31 17:27:03,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.705882352941178) internal successors, (284), 17 states have internal predecessors, (284), 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) [2024-01-31 17:27:03,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:03,038 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:03,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-01-31 17:27:03,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:03,238 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:27:03,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:03,239 INFO L85 PathProgramCache]: Analyzing trace with hash 807465693, now seen corresponding path program 3 times [2024-01-31 17:27:03,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:03,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294624036] [2024-01-31 17:27:03,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:03,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:03,253 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:27:03,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1106397773] [2024-01-31 17:27:03,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-01-31 17:27:03,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:03,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:03,254 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:03,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-01-31 17:27:03,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-01-31 17:27:03,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:03,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 28 conjunts are in the unsatisfiable core [2024-01-31 17:27:03,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:03,679 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:27:03,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:27:04,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:04,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294624036] [2024-01-31 17:27:04,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:27:04,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106397773] [2024-01-31 17:27:04,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106397773] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:04,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:27:04,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2024-01-31 17:27:04,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358256768] [2024-01-31 17:27:04,575 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:04,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-01-31 17:27:04,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:04,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-01-31 17:27:04,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2024-01-31 17:27:04,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 51 [2024-01-31 17:27:04,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 745 transitions, 10948 flow. Second operand has 15 states, 15 states have (on average 17.933333333333334) internal successors, (269), 15 states have internal predecessors, (269), 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) [2024-01-31 17:27:04,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:04,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 51 [2024-01-31 17:27:04,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:27:13,972 INFO L124 PetriNetUnfolderBase]: 11157/24311 cut-off events. [2024-01-31 17:27:13,972 INFO L125 PetriNetUnfolderBase]: For 656111/656344 co-relation queries the response was YES. [2024-01-31 17:27:14,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 122628 conditions, 24311 events. 11157/24311 cut-off events. For 656111/656344 co-relation queries the response was YES. Maximal size of possible extension queue 593. Compared 221752 event pairs, 1177 based on Foata normal form. 649/24472 useless extension candidates. Maximal degree in co-relation 122499. Up to 4076 conditions per place. [2024-01-31 17:27:14,315 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 709 selfloop transitions, 1019 changer transitions 0/1747 dead transitions. [2024-01-31 17:27:14,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 357 places, 1747 transitions, 24694 flow [2024-01-31 17:27:14,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-01-31 17:27:14,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2024-01-31 17:27:14,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 1499 transitions. [2024-01-31 17:27:14,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4981721502160186 [2024-01-31 17:27:14,319 INFO L175 Difference]: Start difference. First operand has 299 places, 745 transitions, 10948 flow. Second operand 59 states and 1499 transitions. [2024-01-31 17:27:14,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 357 places, 1747 transitions, 24694 flow [2024-01-31 17:27:17,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 1747 transitions, 23648 flow, removed 500 selfloop flow, removed 1 redundant places. [2024-01-31 17:27:17,328 INFO L231 Difference]: Finished difference. Result has 387 places, 1246 transitions, 20265 flow [2024-01-31 17:27:17,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=10437, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=744, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=571, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=59, PETRI_FLOW=20265, PETRI_PLACES=387, PETRI_TRANSITIONS=1246} [2024-01-31 17:27:17,329 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 341 predicate places. [2024-01-31 17:27:17,329 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 1246 transitions, 20265 flow [2024-01-31 17:27:17,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.933333333333334) internal successors, (269), 15 states have internal predecessors, (269), 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) [2024-01-31 17:27:17,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:17,329 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:17,341 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-01-31 17:27:17,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:17,529 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:27:17,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:17,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1860826461, now seen corresponding path program 4 times [2024-01-31 17:27:17,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:17,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065089465] [2024-01-31 17:27:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:17,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:17,542 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:27:17,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251531362] [2024-01-31 17:27:17,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-01-31 17:27:17,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:17,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:17,544 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:17,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-01-31 17:27:17,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-01-31 17:27:17,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:17,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 34 conjunts are in the unsatisfiable core [2024-01-31 17:27:17,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:27:18,113 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:27:18,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:18,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065089465] [2024-01-31 17:27:18,888 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:27:18,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251531362] [2024-01-31 17:27:18,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251531362] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:18,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:27:18,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 16 [2024-01-31 17:27:18,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305711874] [2024-01-31 17:27:18,889 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:18,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:27:18,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:18,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:27:18,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:27:19,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-01-31 17:27:19,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 1246 transitions, 20265 flow. Second operand has 17 states, 17 states have (on average 16.705882352941178) internal successors, (284), 17 states have internal predecessors, (284), 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) [2024-01-31 17:27:19,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:19,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-01-31 17:27:19,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:27:32,681 INFO L124 PetriNetUnfolderBase]: 13634/29468 cut-off events. [2024-01-31 17:27:32,681 INFO L125 PetriNetUnfolderBase]: For 822112/822232 co-relation queries the response was YES. [2024-01-31 17:27:33,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 168239 conditions, 29468 events. 13634/29468 cut-off events. For 822112/822232 co-relation queries the response was YES. Maximal size of possible extension queue 743. Compared 276734 event pairs, 1683 based on Foata normal form. 366/29161 useless extension candidates. Maximal degree in co-relation 168078. Up to 5075 conditions per place. [2024-01-31 17:27:33,870 INFO L140 encePairwiseOnDemand]: 39/51 looper letters, 853 selfloop transitions, 1120 changer transitions 2/1993 dead transitions. [2024-01-31 17:27:33,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 1993 transitions, 32147 flow [2024-01-31 17:27:33,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-01-31 17:27:33,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2024-01-31 17:27:33,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 1316 transitions. [2024-01-31 17:27:33,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.516078431372549 [2024-01-31 17:27:33,872 INFO L175 Difference]: Start difference. First operand has 387 places, 1246 transitions, 20265 flow. Second operand 50 states and 1316 transitions. [2024-01-31 17:27:33,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 1993 transitions, 32147 flow [2024-01-31 17:27:40,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 1993 transitions, 31209 flow, removed 375 selfloop flow, removed 7 redundant places. [2024-01-31 17:27:40,706 INFO L231 Difference]: Finished difference. Result has 449 places, 1448 transitions, 26450 flow [2024-01-31 17:27:40,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=19145, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=898, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=26450, PETRI_PLACES=449, PETRI_TRANSITIONS=1448} [2024-01-31 17:27:40,708 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 403 predicate places. [2024-01-31 17:27:40,708 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 1448 transitions, 26450 flow [2024-01-31 17:27:40,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.705882352941178) internal successors, (284), 17 states have internal predecessors, (284), 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) [2024-01-31 17:27:40,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:27:40,708 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:27:40,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-01-31 17:27:40,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:40,909 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:27:40,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:27:40,909 INFO L85 PathProgramCache]: Analyzing trace with hash -7014835, now seen corresponding path program 5 times [2024-01-31 17:27:40,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:27:40,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771666633] [2024-01-31 17:27:40,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:27:40,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:27:40,923 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:27:40,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527816640] [2024-01-31 17:27:40,923 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-01-31 17:27:40,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:27:40,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:27:40,924 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:27:40,925 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-01-31 17:27:41,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-01-31 17:27:41,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:27:41,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 37 conjunts are in the unsatisfiable core [2024-01-31 17:27:41,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:27:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:27:41,366 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:27:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:27:42,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:27:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771666633] [2024-01-31 17:27:42,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:27:42,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527816640] [2024-01-31 17:27:42,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527816640] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:27:42,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:27:42,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2024-01-31 17:27:42,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585100318] [2024-01-31 17:27:42,103 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-31 17:27:42,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-01-31 17:27:42,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:27:42,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-01-31 17:27:42,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-01-31 17:27:42,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 51 [2024-01-31 17:27:42,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 1448 transitions, 26450 flow. Second operand has 18 states, 18 states have (on average 15.666666666666666) internal successors, (282), 18 states have internal predecessors, (282), 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) [2024-01-31 17:27:42,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:27:42,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 51 [2024-01-31 17:27:42,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-01-31 17:28:02,444 INFO L124 PetriNetUnfolderBase]: 19263/41732 cut-off events. [2024-01-31 17:28:02,444 INFO L125 PetriNetUnfolderBase]: For 1358118/1358286 co-relation queries the response was YES. [2024-01-31 17:28:04,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 249904 conditions, 41732 events. 19263/41732 cut-off events. For 1358118/1358286 co-relation queries the response was YES. Maximal size of possible extension queue 1007. Compared 413709 event pairs, 676 based on Foata normal form. 714/41565 useless extension candidates. Maximal degree in co-relation 249724. Up to 7197 conditions per place. [2024-01-31 17:28:04,251 INFO L140 encePairwiseOnDemand]: 37/51 looper letters, 1045 selfloop transitions, 1631 changer transitions 5/2699 dead transitions. [2024-01-31 17:28:04,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 2699 transitions, 47738 flow [2024-01-31 17:28:04,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-01-31 17:28:04,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2024-01-31 17:28:04,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 1632 transitions. [2024-01-31 17:28:04,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47761194029850745 [2024-01-31 17:28:04,255 INFO L175 Difference]: Start difference. First operand has 449 places, 1448 transitions, 26450 flow. Second operand 67 states and 1632 transitions. [2024-01-31 17:28:04,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 2699 transitions, 47738 flow [2024-01-31 17:28:16,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 2699 transitions, 47124 flow, removed 133 selfloop flow, removed 18 redundant places. [2024-01-31 17:28:16,790 INFO L231 Difference]: Finished difference. Result has 526 places, 2001 transitions, 41380 flow [2024-01-31 17:28:16,792 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=51, PETRI_DIFFERENCE_MINUEND_FLOW=25879, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=41380, PETRI_PLACES=526, PETRI_TRANSITIONS=2001} [2024-01-31 17:28:16,792 INFO L281 CegarLoopForPetriNet]: 46 programPoint places, 480 predicate places. [2024-01-31 17:28:16,792 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 2001 transitions, 41380 flow [2024-01-31 17:28:16,793 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.666666666666666) internal successors, (282), 18 states have internal predecessors, (282), 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) [2024-01-31 17:28:16,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-01-31 17:28:16,793 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-01-31 17:28:16,808 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-01-31 17:28:16,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-01-31 17:28:16,998 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting t2Err0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 10 more)] === [2024-01-31 17:28:16,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-01-31 17:28:16,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1360624961, now seen corresponding path program 6 times [2024-01-31 17:28:16,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-01-31 17:28:16,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976271539] [2024-01-31 17:28:16,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-01-31 17:28:16,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-01-31 17:28:17,036 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2024-01-31 17:28:17,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465478524] [2024-01-31 17:28:17,036 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-01-31 17:28:17,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-01-31 17:28:17,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-01-31 17:28:17,037 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-01-31 17:28:17,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-01-31 17:28:17,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-01-31 17:28:17,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-01-31 17:28:17,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 27 conjunts are in the unsatisfiable core [2024-01-31 17:28:17,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-01-31 17:28:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:28:17,610 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-01-31 17:28:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-01-31 17:28:18,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-01-31 17:28:18,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976271539] [2024-01-31 17:28:18,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-01-31 17:28:18,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465478524] [2024-01-31 17:28:18,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465478524] provided 0 perfect and 2 imperfect interpolant sequences [2024-01-31 17:28:18,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-01-31 17:28:18,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2024-01-31 17:28:18,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385527378] [2024-01-31 17:28:18,475 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-01-31 17:28:18,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-01-31 17:28:18,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-01-31 17:28:18,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-01-31 17:28:18,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2024-01-31 17:28:18,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 51 [2024-01-31 17:28:18,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 2001 transitions, 41380 flow. Second operand has 17 states, 17 states have (on average 16.705882352941178) internal successors, (284), 17 states have internal predecessors, (284), 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) [2024-01-31 17:28:18,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-01-31 17:28:18,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 51 [2024-01-31 17:28:18,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand