./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix012_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/mix012_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 76401ed0 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-wmm/mix012_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix012_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.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 --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-76401ed-m [2024-06-20 15:51:50,982 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-20 15:51:51,044 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-20 15:51:51,050 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-20 15:51:51,051 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-20 15:51:51,085 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-20 15:51:51,086 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-20 15:51:51,086 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-20 15:51:51,087 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-20 15:51:51,087 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-20 15:51:51,087 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-20 15:51:51,088 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-20 15:51:51,088 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-20 15:51:51,089 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-20 15:51:51,089 INFO L153 SettingsManager]: * Use SBE=true [2024-06-20 15:51:51,089 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-20 15:51:51,090 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-20 15:51:51,090 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-20 15:51:51,090 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-20 15:51:51,091 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-20 15:51:51,091 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-20 15:51:51,095 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-20 15:51:51,096 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-20 15:51:51,096 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-20 15:51:51,099 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-20 15:51:51,100 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-20 15:51:51,100 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-20 15:51:51,100 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-20 15:51:51,101 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-20 15:51:51,101 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-20 15:51:51,102 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-20 15:51:51,102 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-20 15:51:51,103 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:51:51,103 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-20 15:51:51,103 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-20 15:51:51,103 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-20 15:51:51,120 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-20 15:51:51,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-20 15:51:51,121 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-20 15:51:51,121 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-20 15:51:51,121 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-20 15:51:51,121 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-20 15:51:51,122 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-20 15:51:51,122 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-20 15:51:51,385 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-20 15:51:51,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-20 15:51:51,408 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-20 15:51:51,409 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-20 15:51:51,410 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-20 15:51:51,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix012_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.yml/witness.yml [2024-06-20 15:51:51,549 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-20 15:51:51,549 INFO L274 PluginConnector]: CDTParser initialized [2024-06-20 15:51:51,550 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix012_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i [2024-06-20 15:51:52,643 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-20 15:51:52,926 INFO L384 CDTParser]: Found 1 translation units. [2024-06-20 15:51:52,927 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix012_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i [2024-06-20 15:51:52,950 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff4c064c/98d61ecf44e6486e904b4d2c5824fd31/FLAGb7cb72b65 [2024-06-20 15:51:52,960 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ff4c064c/98d61ecf44e6486e904b4d2c5824fd31 [2024-06-20 15:51:52,960 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-20 15:51:52,961 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-20 15:51:52,962 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-20 15:51:52,962 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-20 15:51:52,968 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-20 15:51:52,971 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:51:51" (1/2) ... [2024-06-20 15:51:52,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154fc56e and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:51:52, skipping insertion in model container [2024-06-20 15:51:52,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:51:51" (1/2) ... [2024-06-20 15:51:52,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3ed208c3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.06 03:51:52, skipping insertion in model container [2024-06-20 15:51:52,974 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:51:52" (2/2) ... [2024-06-20 15:51:52,974 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@154fc56e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:52, skipping insertion in model container [2024-06-20 15:51:52,975 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.06 03:51:52" (2/2) ... [2024-06-20 15:51:52,975 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-20 15:51:53,043 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-20 15:51:53,044 INFO L97 edCorrectnessWitness]: Location invariant before [L816-L816] (((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-20 15:51:53,045 INFO L97 edCorrectnessWitness]: Location invariant before [L815-L815] (((((((((((((((! multithreaded || y$r_buff1_thd0 == (_Bool)0) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || ((0 <= y$w_buff0 && y$w_buff0 <= 1) && (y$w_buff0 == 0 || y$w_buff0 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p1_EBX && __unbuffered_p1_EBX <= 1) && (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= y$mem_tmp && y$mem_tmp <= 1) && (y$mem_tmp == 0 || y$mem_tmp == 1)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || ((0 <= y$w_buff1 && y$w_buff1 <= 1) && (y$w_buff1 == 0 || y$w_buff1 == 1)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0) [2024-06-20 15:51:53,045 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-20 15:51:53,045 INFO L106 edCorrectnessWitness]: ghost_update [L813-L813] multithreaded = 1; [2024-06-20 15:51:53,094 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-20 15:51:53,482 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:51:53,493 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-20 15:51:53,584 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-20 15:51:53,622 INFO L206 MainTranslator]: Completed translation [2024-06-20 15:51:53,623 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53 WrapperNode [2024-06-20 15:51:53,623 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-20 15:51:53,624 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-20 15:51:53,625 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-20 15:51:53,625 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-20 15:51:53,631 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,651 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,685 INFO L138 Inliner]: procedures = 174, calls = 36, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 114 [2024-06-20 15:51:53,690 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-20 15:51:53,691 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-20 15:51:53,691 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-20 15:51:53,691 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-20 15:51:53,699 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,699 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,702 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,717 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-20 15:51:53,717 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,718 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,725 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,727 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,728 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,730 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,732 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-20 15:51:53,733 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-20 15:51:53,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-20 15:51:53,733 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-20 15:51:53,734 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (1/1) ... [2024-06-20 15:51:53,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-20 15:51:53,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-20 15:51:53,790 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-20 15:51:53,822 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-20 15:51:53,844 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-20 15:51:53,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-20 15:51:53,845 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-20 15:51:53,845 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-20 15:51:53,845 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-20 15:51:53,845 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-20 15:51:53,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-20 15:51:53,846 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-20 15:51:53,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-20 15:51:53,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-20 15:51:53,847 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-20 15:51:53,958 INFO L244 CfgBuilder]: Building ICFG [2024-06-20 15:51:53,960 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-20 15:51:54,239 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-20 15:51:54,239 INFO L293 CfgBuilder]: Performing block encoding [2024-06-20 15:51:54,418 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-20 15:51:54,419 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-20 15:51:54,422 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:51:54 BoogieIcfgContainer [2024-06-20 15:51:54,422 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-20 15:51:54,425 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-20 15:51:54,425 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-20 15:51:54,428 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-20 15:51:54,429 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.06 03:51:51" (1/4) ... [2024-06-20 15:51:54,429 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62235fd3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.06 03:51:54, skipping insertion in model container [2024-06-20 15:51:54,430 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.06 03:51:52" (2/4) ... [2024-06-20 15:51:54,431 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62235fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:51:54, skipping insertion in model container [2024-06-20 15:51:54,431 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.06 03:51:53" (3/4) ... [2024-06-20 15:51:54,432 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62235fd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.06 03:51:54, skipping insertion in model container [2024-06-20 15:51:54,434 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.06 03:51:54" (4/4) ... [2024-06-20 15:51:54,435 INFO L112 eAbstractionObserver]: Analyzing ICFG mix012_power.oepc_power.opt_pso.oepc_rmo.oepc_rmo.opt_tso.oepc.i [2024-06-20 15:51:54,452 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-20 15:51:54,452 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-20 15:51:54,452 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-20 15:51:54,495 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-20 15:51:54,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 37 places, 30 transitions, 68 flow [2024-06-20 15:51:54,561 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2024-06-20 15:51:54,561 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:51:54,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 28 events. 0/28 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 38 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-20 15:51:54,563 INFO L82 GeneralOperation]: Start removeDead. Operand has 37 places, 30 transitions, 68 flow [2024-06-20 15:51:54,566 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 22 transitions, 50 flow [2024-06-20 15:51:54,580 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-20 15:51:54,591 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;@43a7e33f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-20 15:51:54,592 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-20 15:51:54,596 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-20 15:51:54,597 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-20 15:51:54,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-20 15:51:54,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:54,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-20 15:51:54,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:51:54,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:54,603 INFO L85 PathProgramCache]: Analyzing trace with hash 330355608, now seen corresponding path program 1 times [2024-06-20 15:51:54,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:54,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410260877] [2024-06-20 15:51:54,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:54,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:55,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:55,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:55,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410260877] [2024-06-20 15:51:55,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410260877] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:55,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:55,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-20 15:51:55,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15788526] [2024-06-20 15:51:55,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:55,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-20 15:51:55,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:55,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-20 15:51:55,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-20 15:51:55,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-20 15:51:55,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:55,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:55,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-20 15:51:55,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:55,798 INFO L124 PetriNetUnfolderBase]: 131/256 cut-off events. [2024-06-20 15:51:55,798 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-06-20 15:51:55,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 512 conditions, 256 events. 131/256 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 939 event pairs, 75 based on Foata normal form. 1/251 useless extension candidates. Maximal degree in co-relation 501. Up to 235 conditions per place. [2024-06-20 15:51:55,804 INFO L140 encePairwiseOnDemand]: 25/30 looper letters, 20 selfloop transitions, 3 changer transitions 0/28 dead transitions. [2024-06-20 15:51:55,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 28 transitions, 111 flow [2024-06-20 15:51:55,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-20 15:51:55,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-20 15:51:55,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 55 transitions. [2024-06-20 15:51:55,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6111111111111112 [2024-06-20 15:51:55,817 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 50 flow. Second operand 3 states and 55 transitions. [2024-06-20 15:51:55,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 28 transitions, 111 flow [2024-06-20 15:51:55,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 28 transitions, 108 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-20 15:51:55,821 INFO L231 Difference]: Finished difference. Result has 30 places, 24 transitions, 69 flow [2024-06-20 15:51:55,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=30, PETRI_TRANSITIONS=24} [2024-06-20 15:51:55,826 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2024-06-20 15:51:55,826 INFO L495 AbstractCegarLoop]: Abstraction has has 30 places, 24 transitions, 69 flow [2024-06-20 15:51:55,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:55,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:55,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:55,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-20 15:51:55,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:51:55,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:55,828 INFO L85 PathProgramCache]: Analyzing trace with hash -355808329, now seen corresponding path program 1 times [2024-06-20 15:51:55,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:55,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842695287] [2024-06-20 15:51:55,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:55,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:55,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:56,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:56,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842695287] [2024-06-20 15:51:56,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842695287] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:56,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:56,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-20 15:51:56,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638263092] [2024-06-20 15:51:56,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:56,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-20 15:51:56,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:56,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-20 15:51:56,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-20 15:51:56,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 30 [2024-06-20 15:51:56,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 24 transitions, 69 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:56,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:56,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 30 [2024-06-20 15:51:56,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:56,681 INFO L124 PetriNetUnfolderBase]: 128/256 cut-off events. [2024-06-20 15:51:56,681 INFO L125 PetriNetUnfolderBase]: For 50/50 co-relation queries the response was YES. [2024-06-20 15:51:56,683 INFO L83 FinitePrefix]: Finished finitePrefix Result has 579 conditions, 256 events. 128/256 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 925 event pairs, 57 based on Foata normal form. 2/256 useless extension candidates. Maximal degree in co-relation 567. Up to 221 conditions per place. [2024-06-20 15:51:56,685 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 24 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2024-06-20 15:51:56,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 153 flow [2024-06-20 15:51:56,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-20 15:51:56,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-20 15:51:56,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 71 transitions. [2024-06-20 15:51:56,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-06-20 15:51:56,688 INFO L175 Difference]: Start difference. First operand has 30 places, 24 transitions, 69 flow. Second operand 4 states and 71 transitions. [2024-06-20 15:51:56,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 153 flow [2024-06-20 15:51:56,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 150 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-20 15:51:56,692 INFO L231 Difference]: Finished difference. Result has 33 places, 26 transitions, 93 flow [2024-06-20 15:51:56,693 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=33, PETRI_TRANSITIONS=26} [2024-06-20 15:51:56,693 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2024-06-20 15:51:56,694 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 26 transitions, 93 flow [2024-06-20 15:51:56,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:56,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:56,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:56,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-20 15:51:56,695 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:51:56,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:56,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1665613782, now seen corresponding path program 1 times [2024-06-20 15:51:56,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:56,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631453453] [2024-06-20 15:51:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:56,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:56,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:57,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:57,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631453453] [2024-06-20 15:51:57,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631453453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:57,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:57,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:51:57,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436125308] [2024-06-20 15:51:57,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:57,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:51:57,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:57,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:51:57,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:51:57,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-06-20 15:51:57,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 26 transitions, 93 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:57,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:57,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-06-20 15:51:57,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:57,931 INFO L124 PetriNetUnfolderBase]: 153/295 cut-off events. [2024-06-20 15:51:57,931 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2024-06-20 15:51:57,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 744 conditions, 295 events. 153/295 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1060 event pairs, 43 based on Foata normal form. 2/295 useless extension candidates. Maximal degree in co-relation 730. Up to 246 conditions per place. [2024-06-20 15:51:57,935 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 33 selfloop transitions, 9 changer transitions 0/46 dead transitions. [2024-06-20 15:51:57,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 234 flow [2024-06-20 15:51:57,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:51:57,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:51:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-20 15:51:57,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-06-20 15:51:57,939 INFO L175 Difference]: Start difference. First operand has 33 places, 26 transitions, 93 flow. Second operand 6 states and 98 transitions. [2024-06-20 15:51:57,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 234 flow [2024-06-20 15:51:57,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 222 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:51:57,941 INFO L231 Difference]: Finished difference. Result has 38 places, 30 transitions, 132 flow [2024-06-20 15:51:57,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=132, PETRI_PLACES=38, PETRI_TRANSITIONS=30} [2024-06-20 15:51:57,942 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 9 predicate places. [2024-06-20 15:51:57,942 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 30 transitions, 132 flow [2024-06-20 15:51:57,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:57,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:57,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:57,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-20 15:51:57,943 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:51:57,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:57,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1811575236, now seen corresponding path program 1 times [2024-06-20 15:51:57,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:57,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16028985] [2024-06-20 15:51:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:57,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:57,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:58,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:58,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:58,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16028985] [2024-06-20 15:51:58,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16028985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:58,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:58,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:51:58,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984660188] [2024-06-20 15:51:58,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:58,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:51:58,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:58,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:51:58,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:51:59,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 30 [2024-06-20 15:51:59,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 30 transitions, 132 flow. Second operand has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:59,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:59,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 30 [2024-06-20 15:51:59,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:51:59,215 INFO L124 PetriNetUnfolderBase]: 149/285 cut-off events. [2024-06-20 15:51:59,216 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2024-06-20 15:51:59,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 807 conditions, 285 events. 149/285 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1000 event pairs, 24 based on Foata normal form. 4/287 useless extension candidates. Maximal degree in co-relation 791. Up to 220 conditions per place. [2024-06-20 15:51:59,218 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 33 selfloop transitions, 10 changer transitions 0/47 dead transitions. [2024-06-20 15:51:59,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 47 transitions, 254 flow [2024-06-20 15:51:59,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:51:59,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:51:59,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-20 15:51:59,222 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-20 15:51:59,223 INFO L175 Difference]: Start difference. First operand has 38 places, 30 transitions, 132 flow. Second operand 7 states and 108 transitions. [2024-06-20 15:51:59,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 47 transitions, 254 flow [2024-06-20 15:51:59,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 47 transitions, 237 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-20 15:51:59,226 INFO L231 Difference]: Finished difference. Result has 41 places, 29 transitions, 131 flow [2024-06-20 15:51:59,226 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=131, PETRI_PLACES=41, PETRI_TRANSITIONS=29} [2024-06-20 15:51:59,228 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2024-06-20 15:51:59,228 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 29 transitions, 131 flow [2024-06-20 15:51:59,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.142857142857142) internal successors, (71), 7 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:59,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:51:59,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:51:59,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-20 15:51:59,229 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:51:59,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:51:59,229 INFO L85 PathProgramCache]: Analyzing trace with hash -524096948, now seen corresponding path program 1 times [2024-06-20 15:51:59,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:51:59,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629232164] [2024-06-20 15:51:59,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:51:59,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:51:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:51:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:51:59,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:51:59,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629232164] [2024-06-20 15:51:59,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629232164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:51:59,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:51:59,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-20 15:51:59,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891791573] [2024-06-20 15:51:59,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:51:59,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-20 15:51:59,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:51:59,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-20 15:51:59,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-20 15:51:59,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:51:59,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 29 transitions, 131 flow. Second operand has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:51:59,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:51:59,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:51:59,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:00,024 INFO L124 PetriNetUnfolderBase]: 174/315 cut-off events. [2024-06-20 15:52:00,025 INFO L125 PetriNetUnfolderBase]: For 461/461 co-relation queries the response was YES. [2024-06-20 15:52:00,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 315 events. 174/315 cut-off events. For 461/461 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 1051 event pairs, 47 based on Foata normal form. 1/314 useless extension candidates. Maximal degree in co-relation 938. Up to 304 conditions per place. [2024-06-20 15:52:00,027 INFO L140 encePairwiseOnDemand]: 24/30 looper letters, 28 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2024-06-20 15:52:00,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 36 transitions, 217 flow [2024-06-20 15:52:00,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-20 15:52:00,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-20 15:52:00,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 59 transitions. [2024-06-20 15:52:00,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2024-06-20 15:52:00,029 INFO L175 Difference]: Start difference. First operand has 41 places, 29 transitions, 131 flow. Second operand 5 states and 59 transitions. [2024-06-20 15:52:00,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 36 transitions, 217 flow [2024-06-20 15:52:00,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 36 transitions, 193 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:00,034 INFO L231 Difference]: Finished difference. Result has 41 places, 31 transitions, 134 flow [2024-06-20 15:52:00,035 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=107, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=134, PETRI_PLACES=41, PETRI_TRANSITIONS=31} [2024-06-20 15:52:00,040 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 12 predicate places. [2024-06-20 15:52:00,040 INFO L495 AbstractCegarLoop]: Abstraction has has 41 places, 31 transitions, 134 flow [2024-06-20 15:52:00,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.5) internal successors, (45), 6 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:00,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:00,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:00,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-20 15:52:00,042 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:00,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:00,042 INFO L85 PathProgramCache]: Analyzing trace with hash 932865172, now seen corresponding path program 1 times [2024-06-20 15:52:00,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:00,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154076717] [2024-06-20 15:52:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:00,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:00,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:00,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:00,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:00,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154076717] [2024-06-20 15:52:00,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154076717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:00,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:00,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:52:00,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585292595] [2024-06-20 15:52:00,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:00,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:52:00,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:00,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:52:00,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:52:00,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:00,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 31 transitions, 134 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:00,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:00,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:00,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:01,013 INFO L124 PetriNetUnfolderBase]: 168/306 cut-off events. [2024-06-20 15:52:01,014 INFO L125 PetriNetUnfolderBase]: For 607/607 co-relation queries the response was YES. [2024-06-20 15:52:01,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 960 conditions, 306 events. 168/306 cut-off events. For 607/607 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1005 event pairs, 44 based on Foata normal form. 3/307 useless extension candidates. Maximal degree in co-relation 940. Up to 286 conditions per place. [2024-06-20 15:52:01,017 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 31 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2024-06-20 15:52:01,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 41 transitions, 238 flow [2024-06-20 15:52:01,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:52:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:52:01,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 70 transitions. [2024-06-20 15:52:01,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 15:52:01,018 INFO L175 Difference]: Start difference. First operand has 41 places, 31 transitions, 134 flow. Second operand 6 states and 70 transitions. [2024-06-20 15:52:01,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 41 transitions, 238 flow [2024-06-20 15:52:01,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 227 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-06-20 15:52:01,022 INFO L231 Difference]: Finished difference. Result has 44 places, 33 transitions, 156 flow [2024-06-20 15:52:01,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=156, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2024-06-20 15:52:01,025 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 15 predicate places. [2024-06-20 15:52:01,025 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 156 flow [2024-06-20 15:52:01,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:01,025 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:01,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:01,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-20 15:52:01,027 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:01,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1449334393, now seen corresponding path program 1 times [2024-06-20 15:52:01,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:01,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339153150] [2024-06-20 15:52:01,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:01,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:01,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:01,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:01,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339153150] [2024-06-20 15:52:01,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339153150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:01,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:01,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:52:01,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032802014] [2024-06-20 15:52:01,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:01,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:52:01,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:01,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:52:01,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:52:01,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:01,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:01,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:01,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:01,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:01,848 INFO L124 PetriNetUnfolderBase]: 171/311 cut-off events. [2024-06-20 15:52:01,849 INFO L125 PetriNetUnfolderBase]: For 754/754 co-relation queries the response was YES. [2024-06-20 15:52:01,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1044 conditions, 311 events. 171/311 cut-off events. For 754/754 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1034 event pairs, 44 based on Foata normal form. 1/310 useless extension candidates. Maximal degree in co-relation 1023. Up to 284 conditions per place. [2024-06-20 15:52:01,851 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 34 selfloop transitions, 11 changer transitions 0/47 dead transitions. [2024-06-20 15:52:01,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 298 flow [2024-06-20 15:52:01,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:52:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:52:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 74 transitions. [2024-06-20 15:52:01,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4111111111111111 [2024-06-20 15:52:01,853 INFO L175 Difference]: Start difference. First operand has 44 places, 33 transitions, 156 flow. Second operand 6 states and 74 transitions. [2024-06-20 15:52:01,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 298 flow [2024-06-20 15:52:01,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 47 transitions, 281 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-20 15:52:01,855 INFO L231 Difference]: Finished difference. Result has 46 places, 37 transitions, 186 flow [2024-06-20 15:52:01,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=186, PETRI_PLACES=46, PETRI_TRANSITIONS=37} [2024-06-20 15:52:01,856 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-20 15:52:01,856 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 37 transitions, 186 flow [2024-06-20 15:52:01,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:01,857 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:01,857 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:01,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-20 15:52:01,857 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:01,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:01,858 INFO L85 PathProgramCache]: Analyzing trace with hash -372880819, now seen corresponding path program 2 times [2024-06-20 15:52:01,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:01,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057536237] [2024-06-20 15:52:01,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:01,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:02,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:02,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:02,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057536237] [2024-06-20 15:52:02,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057536237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:02,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:02,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-20 15:52:02,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032006491] [2024-06-20 15:52:02,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:02,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-20 15:52:02,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:02,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-20 15:52:02,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-20 15:52:02,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:02,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 37 transitions, 186 flow. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:02,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:02,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:02,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:02,656 INFO L124 PetriNetUnfolderBase]: 169/308 cut-off events. [2024-06-20 15:52:02,657 INFO L125 PetriNetUnfolderBase]: For 947/947 co-relation queries the response was YES. [2024-06-20 15:52:02,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1088 conditions, 308 events. 169/308 cut-off events. For 947/947 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1030 event pairs, 43 based on Foata normal form. 1/307 useless extension candidates. Maximal degree in co-relation 1066. Up to 294 conditions per place. [2024-06-20 15:52:02,659 INFO L140 encePairwiseOnDemand]: 23/30 looper letters, 33 selfloop transitions, 8 changer transitions 0/43 dead transitions. [2024-06-20 15:52:02,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 43 transitions, 282 flow [2024-06-20 15:52:02,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-20 15:52:02,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-20 15:52:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 68 transitions. [2024-06-20 15:52:02,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-20 15:52:02,661 INFO L175 Difference]: Start difference. First operand has 46 places, 37 transitions, 186 flow. Second operand 6 states and 68 transitions. [2024-06-20 15:52:02,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 43 transitions, 282 flow [2024-06-20 15:52:02,662 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 268 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-06-20 15:52:02,663 INFO L231 Difference]: Finished difference. Result has 50 places, 37 transitions, 193 flow [2024-06-20 15:52:02,664 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=50, PETRI_TRANSITIONS=37} [2024-06-20 15:52:02,664 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 21 predicate places. [2024-06-20 15:52:02,664 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 37 transitions, 193 flow [2024-06-20 15:52:02,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:02,665 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:02,665 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:02,665 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-20 15:52:02,665 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:02,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:02,666 INFO L85 PathProgramCache]: Analyzing trace with hash -1979812003, now seen corresponding path program 1 times [2024-06-20 15:52:02,666 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:02,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033501550] [2024-06-20 15:52:02,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:02,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:03,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:03,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:03,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033501550] [2024-06-20 15:52:03,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033501550] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:03,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:03,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:03,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90930227] [2024-06-20 15:52:03,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:03,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:03,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:03,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:03,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:03,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:03,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 37 transitions, 193 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:03,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:03,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:03,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:03,731 INFO L124 PetriNetUnfolderBase]: 172/313 cut-off events. [2024-06-20 15:52:03,731 INFO L125 PetriNetUnfolderBase]: For 1171/1171 co-relation queries the response was YES. [2024-06-20 15:52:03,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1135 conditions, 313 events. 172/313 cut-off events. For 1171/1171 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 1041 event pairs, 42 based on Foata normal form. 1/312 useless extension candidates. Maximal degree in co-relation 1111. Up to 284 conditions per place. [2024-06-20 15:52:03,734 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 40 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2024-06-20 15:52:03,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 335 flow [2024-06-20 15:52:03,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-20 15:52:03,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-20 15:52:03,735 INFO L175 Difference]: Start difference. First operand has 50 places, 37 transitions, 193 flow. Second operand 7 states and 83 transitions. [2024-06-20 15:52:03,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 335 flow [2024-06-20 15:52:03,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 311 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:03,739 INFO L231 Difference]: Finished difference. Result has 51 places, 39 transitions, 208 flow [2024-06-20 15:52:03,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=208, PETRI_PLACES=51, PETRI_TRANSITIONS=39} [2024-06-20 15:52:03,741 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 22 predicate places. [2024-06-20 15:52:03,741 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 39 transitions, 208 flow [2024-06-20 15:52:03,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:03,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:03,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:03,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-20 15:52:03,742 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:03,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:03,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1342067115, now seen corresponding path program 1 times [2024-06-20 15:52:03,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:03,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909576580] [2024-06-20 15:52:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:03,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:04,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:04,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:04,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909576580] [2024-06-20 15:52:04,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909576580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:04,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:04,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:04,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242714704] [2024-06-20 15:52:04,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:04,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:04,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:04,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:04,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:04,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:04,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 208 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:04,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:04,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:04,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:04,663 INFO L124 PetriNetUnfolderBase]: 191/344 cut-off events. [2024-06-20 15:52:04,664 INFO L125 PetriNetUnfolderBase]: For 1615/1615 co-relation queries the response was YES. [2024-06-20 15:52:04,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1293 conditions, 344 events. 191/344 cut-off events. For 1615/1615 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1179 event pairs, 46 based on Foata normal form. 3/345 useless extension candidates. Maximal degree in co-relation 1269. Up to 290 conditions per place. [2024-06-20 15:52:04,666 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 43 selfloop transitions, 15 changer transitions 0/60 dead transitions. [2024-06-20 15:52:04,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 60 transitions, 398 flow [2024-06-20 15:52:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-20 15:52:04,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-20 15:52:04,667 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 208 flow. Second operand 7 states and 89 transitions. [2024-06-20 15:52:04,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 60 transitions, 398 flow [2024-06-20 15:52:04,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 60 transitions, 375 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:04,671 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 255 flow [2024-06-20 15:52:04,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=255, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-06-20 15:52:04,671 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 25 predicate places. [2024-06-20 15:52:04,671 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 255 flow [2024-06-20 15:52:04,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:04,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:04,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:04,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-20 15:52:04,672 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:04,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:04,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1979692033, now seen corresponding path program 2 times [2024-06-20 15:52:04,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:04,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968133973] [2024-06-20 15:52:04,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:04,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:05,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:05,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:05,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968133973] [2024-06-20 15:52:05,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968133973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:05,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:05,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:05,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389348647] [2024-06-20 15:52:05,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:05,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:05,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:05,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:05,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:05,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:05,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 255 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:05,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:05,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:05,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:05,582 INFO L124 PetriNetUnfolderBase]: 194/349 cut-off events. [2024-06-20 15:52:05,583 INFO L125 PetriNetUnfolderBase]: For 1906/1906 co-relation queries the response was YES. [2024-06-20 15:52:05,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1430 conditions, 349 events. 194/349 cut-off events. For 1906/1906 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1200 event pairs, 45 based on Foata normal form. 1/348 useless extension candidates. Maximal degree in co-relation 1404. Up to 304 conditions per place. [2024-06-20 15:52:05,586 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 41 selfloop transitions, 17 changer transitions 0/60 dead transitions. [2024-06-20 15:52:05,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 445 flow [2024-06-20 15:52:05,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:05,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:05,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 85 transitions. [2024-06-20 15:52:05,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-20 15:52:05,588 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 255 flow. Second operand 7 states and 85 transitions. [2024-06-20 15:52:05,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 445 flow [2024-06-20 15:52:05,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 60 transitions, 436 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-20 15:52:05,593 INFO L231 Difference]: Finished difference. Result has 59 places, 49 transitions, 317 flow [2024-06-20 15:52:05,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=317, PETRI_PLACES=59, PETRI_TRANSITIONS=49} [2024-06-20 15:52:05,594 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2024-06-20 15:52:05,594 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 49 transitions, 317 flow [2024-06-20 15:52:05,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:05,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:05,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:05,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-20 15:52:05,595 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:05,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:05,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1325835025, now seen corresponding path program 2 times [2024-06-20 15:52:05,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:05,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654380449] [2024-06-20 15:52:05,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:05,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:05,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:06,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:06,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654380449] [2024-06-20 15:52:06,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654380449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:06,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:06,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:06,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534246977] [2024-06-20 15:52:06,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:06,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:06,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:06,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:06,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:06,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:06,246 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 49 transitions, 317 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:06,246 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:06,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:06,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:06,514 INFO L124 PetriNetUnfolderBase]: 203/364 cut-off events. [2024-06-20 15:52:06,514 INFO L125 PetriNetUnfolderBase]: For 2509/2509 co-relation queries the response was YES. [2024-06-20 15:52:06,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1570 conditions, 364 events. 203/364 cut-off events. For 2509/2509 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1261 event pairs, 44 based on Foata normal form. 3/365 useless extension candidates. Maximal degree in co-relation 1541. Up to 341 conditions per place. [2024-06-20 15:52:06,517 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 48 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-20 15:52:06,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 60 transitions, 467 flow [2024-06-20 15:52:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:06,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 79 transitions. [2024-06-20 15:52:06,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3761904761904762 [2024-06-20 15:52:06,521 INFO L175 Difference]: Start difference. First operand has 59 places, 49 transitions, 317 flow. Second operand 7 states and 79 transitions. [2024-06-20 15:52:06,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 60 transitions, 467 flow [2024-06-20 15:52:06,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 60 transitions, 445 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-20 15:52:06,527 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 336 flow [2024-06-20 15:52:06,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=336, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2024-06-20 15:52:06,528 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 34 predicate places. [2024-06-20 15:52:06,528 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 336 flow [2024-06-20 15:52:06,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:06,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:06,529 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:06,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-20 15:52:06,529 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:06,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:06,530 INFO L85 PathProgramCache]: Analyzing trace with hash -1164935781, now seen corresponding path program 3 times [2024-06-20 15:52:06,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:06,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803066862] [2024-06-20 15:52:06,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:06,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:06,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:07,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:07,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803066862] [2024-06-20 15:52:07,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803066862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:07,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:07,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:07,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070226567] [2024-06-20 15:52:07,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:07,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:07,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:07,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:07,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:07,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:07,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 336 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:07,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:07,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:07,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:07,442 INFO L124 PetriNetUnfolderBase]: 201/361 cut-off events. [2024-06-20 15:52:07,442 INFO L125 PetriNetUnfolderBase]: For 2724/2724 co-relation queries the response was YES. [2024-06-20 15:52:07,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1609 conditions, 361 events. 201/361 cut-off events. For 2724/2724 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1245 event pairs, 44 based on Foata normal form. 1/360 useless extension candidates. Maximal degree in co-relation 1578. Up to 344 conditions per place. [2024-06-20 15:52:07,445 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 46 selfloop transitions, 10 changer transitions 0/58 dead transitions. [2024-06-20 15:52:07,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 58 transitions, 464 flow [2024-06-20 15:52:07,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:07,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 77 transitions. [2024-06-20 15:52:07,447 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 15:52:07,447 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 336 flow. Second operand 7 states and 77 transitions. [2024-06-20 15:52:07,447 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 58 transitions, 464 flow [2024-06-20 15:52:07,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 58 transitions, 435 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:07,452 INFO L231 Difference]: Finished difference. Result has 65 places, 51 transitions, 332 flow [2024-06-20 15:52:07,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=307, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=332, PETRI_PLACES=65, PETRI_TRANSITIONS=51} [2024-06-20 15:52:07,453 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2024-06-20 15:52:07,453 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 51 transitions, 332 flow [2024-06-20 15:52:07,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:07,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:07,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:07,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-20 15:52:07,454 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:07,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:07,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1164935595, now seen corresponding path program 3 times [2024-06-20 15:52:07,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:07,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079527016] [2024-06-20 15:52:07,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:07,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:08,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:08,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:08,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079527016] [2024-06-20 15:52:08,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079527016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:08,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:08,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-20 15:52:08,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982610938] [2024-06-20 15:52:08,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:08,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-20 15:52:08,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:08,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-20 15:52:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-20 15:52:08,137 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:08,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 51 transitions, 332 flow. Second operand has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:08,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:08,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:08,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:08,374 INFO L124 PetriNetUnfolderBase]: 195/352 cut-off events. [2024-06-20 15:52:08,374 INFO L125 PetriNetUnfolderBase]: For 2980/2980 co-relation queries the response was YES. [2024-06-20 15:52:08,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1561 conditions, 352 events. 195/352 cut-off events. For 2980/2980 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1216 event pairs, 42 based on Foata normal form. 3/353 useless extension candidates. Maximal degree in co-relation 1530. Up to 317 conditions per place. [2024-06-20 15:52:08,377 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 47 selfloop transitions, 13 changer transitions 0/62 dead transitions. [2024-06-20 15:52:08,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 62 transitions, 480 flow [2024-06-20 15:52:08,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-20 15:52:08,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-20 15:52:08,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 83 transitions. [2024-06-20 15:52:08,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-20 15:52:08,379 INFO L175 Difference]: Start difference. First operand has 65 places, 51 transitions, 332 flow. Second operand 7 states and 83 transitions. [2024-06-20 15:52:08,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 62 transitions, 480 flow [2024-06-20 15:52:08,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 62 transitions, 449 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:08,402 INFO L231 Difference]: Finished difference. Result has 66 places, 51 transitions, 332 flow [2024-06-20 15:52:08,403 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=332, PETRI_PLACES=66, PETRI_TRANSITIONS=51} [2024-06-20 15:52:08,403 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 37 predicate places. [2024-06-20 15:52:08,403 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 51 transitions, 332 flow [2024-06-20 15:52:08,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.375) internal successors, (59), 8 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:08,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:08,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:08,404 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-20 15:52:08,404 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:08,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:08,404 INFO L85 PathProgramCache]: Analyzing trace with hash 522219842, now seen corresponding path program 1 times [2024-06-20 15:52:08,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:08,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194344348] [2024-06-20 15:52:08,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:08,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:08,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:09,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:09,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:09,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194344348] [2024-06-20 15:52:09,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194344348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:09,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:09,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:09,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383996637] [2024-06-20 15:52:09,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:09,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:09,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:09,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:09,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:09,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:09,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 51 transitions, 332 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:09,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:09,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:09,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:09,927 INFO L124 PetriNetUnfolderBase]: 198/357 cut-off events. [2024-06-20 15:52:09,927 INFO L125 PetriNetUnfolderBase]: For 3236/3236 co-relation queries the response was YES. [2024-06-20 15:52:09,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 357 events. 198/357 cut-off events. For 3236/3236 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1246 event pairs, 41 based on Foata normal form. 1/356 useless extension candidates. Maximal degree in co-relation 1590. Up to 314 conditions per place. [2024-06-20 15:52:09,930 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 55 selfloop transitions, 14 changer transitions 0/71 dead transitions. [2024-06-20 15:52:09,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 71 transitions, 528 flow [2024-06-20 15:52:09,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:09,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:09,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-20 15:52:09,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3851851851851852 [2024-06-20 15:52:09,932 INFO L175 Difference]: Start difference. First operand has 66 places, 51 transitions, 332 flow. Second operand 9 states and 104 transitions. [2024-06-20 15:52:09,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 71 transitions, 528 flow [2024-06-20 15:52:09,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 71 transitions, 489 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:09,937 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 345 flow [2024-06-20 15:52:09,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=345, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2024-06-20 15:52:09,938 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 40 predicate places. [2024-06-20 15:52:09,938 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 345 flow [2024-06-20 15:52:09,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:09,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:09,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:09,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-20 15:52:09,939 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:09,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:09,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1341868935, now seen corresponding path program 1 times [2024-06-20 15:52:09,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:09,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605430088] [2024-06-20 15:52:09,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:09,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:09,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:10,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:10,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:10,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605430088] [2024-06-20 15:52:10,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605430088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:10,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:10,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426838722] [2024-06-20 15:52:10,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:10,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:10,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:10,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:10,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 345 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:10,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:10,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:10,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:10,978 INFO L124 PetriNetUnfolderBase]: 207/372 cut-off events. [2024-06-20 15:52:10,978 INFO L125 PetriNetUnfolderBase]: For 3864/3864 co-relation queries the response was YES. [2024-06-20 15:52:10,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1719 conditions, 372 events. 207/372 cut-off events. For 3864/3864 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1314 event pairs, 44 based on Foata normal form. 3/373 useless extension candidates. Maximal degree in co-relation 1686. Up to 334 conditions per place. [2024-06-20 15:52:10,981 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 57 selfloop transitions, 12 changer transitions 0/71 dead transitions. [2024-06-20 15:52:10,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 537 flow [2024-06-20 15:52:10,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:10,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 94 transitions. [2024-06-20 15:52:10,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39166666666666666 [2024-06-20 15:52:10,983 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 345 flow. Second operand 8 states and 94 transitions. [2024-06-20 15:52:10,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 537 flow [2024-06-20 15:52:10,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 71 transitions, 503 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:10,989 INFO L231 Difference]: Finished difference. Result has 70 places, 55 transitions, 358 flow [2024-06-20 15:52:10,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=358, PETRI_PLACES=70, PETRI_TRANSITIONS=55} [2024-06-20 15:52:10,990 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 41 predicate places. [2024-06-20 15:52:10,990 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 55 transitions, 358 flow [2024-06-20 15:52:10,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:10,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:10,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:10,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-20 15:52:10,991 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:10,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:10,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1240903923, now seen corresponding path program 2 times [2024-06-20 15:52:10,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:10,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793489140] [2024-06-20 15:52:10,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:10,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:11,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:11,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:11,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:11,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793489140] [2024-06-20 15:52:11,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793489140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:11,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:11,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:11,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876317028] [2024-06-20 15:52:11,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:11,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:11,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:11,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:11,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:11,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:11,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 55 transitions, 358 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:11,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:11,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:11,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:11,840 INFO L124 PetriNetUnfolderBase]: 241/427 cut-off events. [2024-06-20 15:52:11,840 INFO L125 PetriNetUnfolderBase]: For 5156/5156 co-relation queries the response was YES. [2024-06-20 15:52:11,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2081 conditions, 427 events. 241/427 cut-off events. For 5156/5156 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1572 event pairs, 49 based on Foata normal form. 3/428 useless extension candidates. Maximal degree in co-relation 2047. Up to 291 conditions per place. [2024-06-20 15:52:11,844 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 51 selfloop transitions, 27 changer transitions 0/80 dead transitions. [2024-06-20 15:52:11,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 680 flow [2024-06-20 15:52:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:11,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:11,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 104 transitions. [2024-06-20 15:52:11,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 15:52:11,847 INFO L175 Difference]: Start difference. First operand has 70 places, 55 transitions, 358 flow. Second operand 8 states and 104 transitions. [2024-06-20 15:52:11,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 680 flow [2024-06-20 15:52:11,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 80 transitions, 649 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:11,855 INFO L231 Difference]: Finished difference. Result has 72 places, 61 transitions, 444 flow [2024-06-20 15:52:11,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=444, PETRI_PLACES=72, PETRI_TRANSITIONS=61} [2024-06-20 15:52:11,855 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2024-06-20 15:52:11,855 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 61 transitions, 444 flow [2024-06-20 15:52:11,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:11,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:11,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:11,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-20 15:52:11,856 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:11,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:11,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1345588005, now seen corresponding path program 3 times [2024-06-20 15:52:11,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:11,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493746098] [2024-06-20 15:52:11,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:11,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:12,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:12,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493746098] [2024-06-20 15:52:12,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493746098] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:12,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:12,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:12,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601077593] [2024-06-20 15:52:12,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:12,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:12,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:12,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:12,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:12,589 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 61 transitions, 444 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:12,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:12,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:12,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:12,819 INFO L124 PetriNetUnfolderBase]: 235/418 cut-off events. [2024-06-20 15:52:12,819 INFO L125 PetriNetUnfolderBase]: For 5511/5511 co-relation queries the response was YES. [2024-06-20 15:52:12,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2093 conditions, 418 events. 235/418 cut-off events. For 5511/5511 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1530 event pairs, 47 based on Foata normal form. 3/419 useless extension candidates. Maximal degree in co-relation 2058. Up to 287 conditions per place. [2024-06-20 15:52:12,823 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 53 selfloop transitions, 26 changer transitions 0/81 dead transitions. [2024-06-20 15:52:12,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 81 transitions, 688 flow [2024-06-20 15:52:12,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-20 15:52:12,824 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44166666666666665 [2024-06-20 15:52:12,824 INFO L175 Difference]: Start difference. First operand has 72 places, 61 transitions, 444 flow. Second operand 8 states and 106 transitions. [2024-06-20 15:52:12,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 81 transitions, 688 flow [2024-06-20 15:52:12,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 81 transitions, 652 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-20 15:52:12,834 INFO L231 Difference]: Finished difference. Result has 77 places, 61 transitions, 465 flow [2024-06-20 15:52:12,834 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=408, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=465, PETRI_PLACES=77, PETRI_TRANSITIONS=61} [2024-06-20 15:52:12,835 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 48 predicate places. [2024-06-20 15:52:12,835 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 61 transitions, 465 flow [2024-06-20 15:52:12,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:12,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:12,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:12,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-20 15:52:12,837 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:12,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:12,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1240909658, now seen corresponding path program 2 times [2024-06-20 15:52:12,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:12,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785987265] [2024-06-20 15:52:12,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:12,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:12,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:13,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:13,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:13,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785987265] [2024-06-20 15:52:13,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785987265] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:13,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:13,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:13,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991402166] [2024-06-20 15:52:13,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:13,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:13,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:13,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:13,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:13,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:13,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 61 transitions, 465 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:13,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:13,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:13,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:13,992 INFO L124 PetriNetUnfolderBase]: 238/423 cut-off events. [2024-06-20 15:52:13,993 INFO L125 PetriNetUnfolderBase]: For 5828/5828 co-relation queries the response was YES. [2024-06-20 15:52:13,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2182 conditions, 423 events. 238/423 cut-off events. For 5828/5828 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1551 event pairs, 50 based on Foata normal form. 1/422 useless extension candidates. Maximal degree in co-relation 2145. Up to 376 conditions per place. [2024-06-20 15:52:13,996 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 53 selfloop transitions, 19 changer transitions 0/74 dead transitions. [2024-06-20 15:52:13,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 74 transitions, 653 flow [2024-06-20 15:52:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:13,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-20 15:52:13,997 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875 [2024-06-20 15:52:13,998 INFO L175 Difference]: Start difference. First operand has 77 places, 61 transitions, 465 flow. Second operand 8 states and 93 transitions. [2024-06-20 15:52:13,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 74 transitions, 653 flow [2024-06-20 15:52:14,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 74 transitions, 589 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:14,006 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 466 flow [2024-06-20 15:52:14,006 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=401, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=466, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-06-20 15:52:14,007 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 49 predicate places. [2024-06-20 15:52:14,007 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 466 flow [2024-06-20 15:52:14,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:14,007 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:14,007 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:14,007 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-20 15:52:14,007 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:14,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:14,008 INFO L85 PathProgramCache]: Analyzing trace with hash 1393514342, now seen corresponding path program 3 times [2024-06-20 15:52:14,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:14,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472433172] [2024-06-20 15:52:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:14,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:14,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:14,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472433172] [2024-06-20 15:52:14,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472433172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:14,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:14,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171857957] [2024-06-20 15:52:14,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:14,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:14,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:14,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:14,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:14,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:14,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 466 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:14,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:14,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:14,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:15,193 INFO L124 PetriNetUnfolderBase]: 236/420 cut-off events. [2024-06-20 15:52:15,193 INFO L125 PetriNetUnfolderBase]: For 6041/6041 co-relation queries the response was YES. [2024-06-20 15:52:15,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2159 conditions, 420 events. 236/420 cut-off events. For 6041/6041 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1546 event pairs, 53 based on Foata normal form. 1/419 useless extension candidates. Maximal degree in co-relation 2121. Up to 400 conditions per place. [2024-06-20 15:52:15,196 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 59 selfloop transitions, 12 changer transitions 0/73 dead transitions. [2024-06-20 15:52:15,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 73 transitions, 648 flow [2024-06-20 15:52:15,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:15,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:15,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-20 15:52:15,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-06-20 15:52:15,198 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 466 flow. Second operand 8 states and 86 transitions. [2024-06-20 15:52:15,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 73 transitions, 648 flow [2024-06-20 15:52:15,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 73 transitions, 599 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:15,206 INFO L231 Difference]: Finished difference. Result has 80 places, 65 transitions, 472 flow [2024-06-20 15:52:15,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=417, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=472, PETRI_PLACES=80, PETRI_TRANSITIONS=65} [2024-06-20 15:52:15,206 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 51 predicate places. [2024-06-20 15:52:15,207 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 65 transitions, 472 flow [2024-06-20 15:52:15,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:15,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:15,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:15,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-20 15:52:15,207 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:15,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:15,207 INFO L85 PathProgramCache]: Analyzing trace with hash -1745912237, now seen corresponding path program 4 times [2024-06-20 15:52:15,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:15,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792900532] [2024-06-20 15:52:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:15,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:15,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:15,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:15,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792900532] [2024-06-20 15:52:15,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792900532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:15,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:15,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:15,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674494269] [2024-06-20 15:52:15,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:15,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:15,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:15,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:15,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:15,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:15,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 65 transitions, 472 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:15,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:15,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:15,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:16,148 INFO L124 PetriNetUnfolderBase]: 245/435 cut-off events. [2024-06-20 15:52:16,149 INFO L125 PetriNetUnfolderBase]: For 7087/7087 co-relation queries the response was YES. [2024-06-20 15:52:16,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2256 conditions, 435 events. 245/435 cut-off events. For 7087/7087 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1615 event pairs, 53 based on Foata normal form. 3/436 useless extension candidates. Maximal degree in co-relation 2217. Up to 399 conditions per place. [2024-06-20 15:52:16,152 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 65 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-20 15:52:16,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 79 transitions, 678 flow [2024-06-20 15:52:16,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:16,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:16,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 90 transitions. [2024-06-20 15:52:16,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-20 15:52:16,153 INFO L175 Difference]: Start difference. First operand has 80 places, 65 transitions, 472 flow. Second operand 8 states and 90 transitions. [2024-06-20 15:52:16,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 79 transitions, 678 flow [2024-06-20 15:52:16,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 79 transitions, 639 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:16,167 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 488 flow [2024-06-20 15:52:16,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=488, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-06-20 15:52:16,167 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 53 predicate places. [2024-06-20 15:52:16,167 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 488 flow [2024-06-20 15:52:16,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:16,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:16,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:16,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-20 15:52:16,168 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:16,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:16,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1753263887, now seen corresponding path program 5 times [2024-06-20 15:52:16,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:16,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848956455] [2024-06-20 15:52:16,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:16,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:16,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:16,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:16,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848956455] [2024-06-20 15:52:16,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848956455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:16,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:16,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:16,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111522346] [2024-06-20 15:52:16,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:16,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:16,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:16,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:16,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:16,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:16,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 488 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:16,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:16,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:16,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:17,135 INFO L124 PetriNetUnfolderBase]: 254/450 cut-off events. [2024-06-20 15:52:17,136 INFO L125 PetriNetUnfolderBase]: For 8004/8004 co-relation queries the response was YES. [2024-06-20 15:52:17,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2377 conditions, 450 events. 254/450 cut-off events. For 8004/8004 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1691 event pairs, 53 based on Foata normal form. 3/451 useless extension candidates. Maximal degree in co-relation 2337. Up to 372 conditions per place. [2024-06-20 15:52:17,140 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 63 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-20 15:52:17,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 758 flow [2024-06-20 15:52:17,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:17,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:17,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-20 15:52:17,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4041666666666667 [2024-06-20 15:52:17,141 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 488 flow. Second operand 8 states and 97 transitions. [2024-06-20 15:52:17,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 758 flow [2024-06-20 15:52:17,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 84 transitions, 723 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:17,151 INFO L231 Difference]: Finished difference. Result has 84 places, 69 transitions, 522 flow [2024-06-20 15:52:17,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=453, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=522, PETRI_PLACES=84, PETRI_TRANSITIONS=69} [2024-06-20 15:52:17,152 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 55 predicate places. [2024-06-20 15:52:17,152 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 69 transitions, 522 flow [2024-06-20 15:52:17,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:17,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:17,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:17,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-20 15:52:17,153 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:17,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:17,154 INFO L85 PathProgramCache]: Analyzing trace with hash -1745645110, now seen corresponding path program 1 times [2024-06-20 15:52:17,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:17,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592059643] [2024-06-20 15:52:17,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:17,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:18,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:18,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:18,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592059643] [2024-06-20 15:52:18,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592059643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:18,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:18,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:18,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311125165] [2024-06-20 15:52:18,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:18,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:18,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:18,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:18,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:18,110 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:18,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 69 transitions, 522 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:18,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:18,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:18,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:18,423 INFO L124 PetriNetUnfolderBase]: 250/444 cut-off events. [2024-06-20 15:52:18,423 INFO L125 PetriNetUnfolderBase]: For 8008/8008 co-relation queries the response was YES. [2024-06-20 15:52:18,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2354 conditions, 444 events. 250/444 cut-off events. For 8008/8008 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1656 event pairs, 49 based on Foata normal form. 2/444 useless extension candidates. Maximal degree in co-relation 2313. Up to 416 conditions per place. [2024-06-20 15:52:18,427 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 67 selfloop transitions, 12 changer transitions 0/81 dead transitions. [2024-06-20 15:52:18,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 81 transitions, 718 flow [2024-06-20 15:52:18,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:18,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 88 transitions. [2024-06-20 15:52:18,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 15:52:18,429 INFO L175 Difference]: Start difference. First operand has 84 places, 69 transitions, 522 flow. Second operand 8 states and 88 transitions. [2024-06-20 15:52:18,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 81 transitions, 718 flow [2024-06-20 15:52:18,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 81 transitions, 654 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:18,441 INFO L231 Difference]: Finished difference. Result has 86 places, 71 transitions, 507 flow [2024-06-20 15:52:18,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=458, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=507, PETRI_PLACES=86, PETRI_TRANSITIONS=71} [2024-06-20 15:52:18,442 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 57 predicate places. [2024-06-20 15:52:18,442 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 71 transitions, 507 flow [2024-06-20 15:52:18,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:18,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:18,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:18,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-20 15:52:18,443 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:18,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:18,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1753269467, now seen corresponding path program 6 times [2024-06-20 15:52:18,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:18,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846843140] [2024-06-20 15:52:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:18,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:18,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:19,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:19,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:19,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846843140] [2024-06-20 15:52:19,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846843140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:19,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:19,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-20 15:52:19,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791152982] [2024-06-20 15:52:19,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:19,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-20 15:52:19,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:19,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-20 15:52:19,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-20 15:52:19,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:19,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 71 transitions, 507 flow. Second operand has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:19,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:19,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:19,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:19,408 INFO L124 PetriNetUnfolderBase]: 244/435 cut-off events. [2024-06-20 15:52:19,408 INFO L125 PetriNetUnfolderBase]: For 7816/7816 co-relation queries the response was YES. [2024-06-20 15:52:19,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2223 conditions, 435 events. 244/435 cut-off events. For 7816/7816 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1644 event pairs, 44 based on Foata normal form. 3/436 useless extension candidates. Maximal degree in co-relation 2181. Up to 362 conditions per place. [2024-06-20 15:52:19,411 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 63 selfloop transitions, 20 changer transitions 0/85 dead transitions. [2024-06-20 15:52:19,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 85 transitions, 709 flow [2024-06-20 15:52:19,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:19,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:19,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-20 15:52:19,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-20 15:52:19,413 INFO L175 Difference]: Start difference. First operand has 86 places, 71 transitions, 507 flow. Second operand 8 states and 95 transitions. [2024-06-20 15:52:19,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 85 transitions, 709 flow [2024-06-20 15:52:19,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 85 transitions, 659 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:19,424 INFO L231 Difference]: Finished difference. Result has 88 places, 71 transitions, 502 flow [2024-06-20 15:52:19,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=502, PETRI_PLACES=88, PETRI_TRANSITIONS=71} [2024-06-20 15:52:19,425 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 59 predicate places. [2024-06-20 15:52:19,425 INFO L495 AbstractCegarLoop]: Abstraction has has 88 places, 71 transitions, 502 flow [2024-06-20 15:52:19,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.333333333333333) internal successors, (66), 9 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:19,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:19,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:19,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-20 15:52:19,425 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:19,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:19,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1745635190, now seen corresponding path program 1 times [2024-06-20 15:52:19,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:19,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970239746] [2024-06-20 15:52:19,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:19,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:19,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:20,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:20,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:20,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970239746] [2024-06-20 15:52:20,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970239746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:20,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:20,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:20,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942471798] [2024-06-20 15:52:20,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:20,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:20,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:20,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:20,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:20,630 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:20,630 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 71 transitions, 502 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:20,630 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:20,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:20,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:20,921 INFO L124 PetriNetUnfolderBase]: 241/430 cut-off events. [2024-06-20 15:52:20,922 INFO L125 PetriNetUnfolderBase]: For 7549/7549 co-relation queries the response was YES. [2024-06-20 15:52:20,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2179 conditions, 430 events. 241/430 cut-off events. For 7549/7549 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1588 event pairs, 46 based on Foata normal form. 2/430 useless extension candidates. Maximal degree in co-relation 2136. Up to 404 conditions per place. [2024-06-20 15:52:20,925 INFO L140 encePairwiseOnDemand]: 22/30 looper letters, 68 selfloop transitions, 11 changer transitions 0/81 dead transitions. [2024-06-20 15:52:20,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 81 transitions, 682 flow [2024-06-20 15:52:20,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-20 15:52:20,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-20 15:52:20,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 86 transitions. [2024-06-20 15:52:20,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35833333333333334 [2024-06-20 15:52:20,926 INFO L175 Difference]: Start difference. First operand has 88 places, 71 transitions, 502 flow. Second operand 8 states and 86 transitions. [2024-06-20 15:52:20,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 81 transitions, 682 flow [2024-06-20 15:52:20,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 81 transitions, 637 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:20,935 INFO L231 Difference]: Finished difference. Result has 89 places, 71 transitions, 483 flow [2024-06-20 15:52:20,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=483, PETRI_PLACES=89, PETRI_TRANSITIONS=71} [2024-06-20 15:52:20,936 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 60 predicate places. [2024-06-20 15:52:20,936 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 71 transitions, 483 flow [2024-06-20 15:52:20,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:20,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:20,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:20,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-20 15:52:20,937 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:20,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:20,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1354596488, now seen corresponding path program 1 times [2024-06-20 15:52:20,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:20,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186748505] [2024-06-20 15:52:20,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:20,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:20,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:21,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:21,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:21,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186748505] [2024-06-20 15:52:21,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186748505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:21,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:21,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:21,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263171779] [2024-06-20 15:52:21,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:21,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:21,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:21,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:21,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:22,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:22,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 71 transitions, 483 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:22,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:22,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:22,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:22,307 INFO L124 PetriNetUnfolderBase]: 252/451 cut-off events. [2024-06-20 15:52:22,308 INFO L125 PetriNetUnfolderBase]: For 8893/8893 co-relation queries the response was YES. [2024-06-20 15:52:22,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2331 conditions, 451 events. 252/451 cut-off events. For 8893/8893 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1720 event pairs, 33 based on Foata normal form. 2/451 useless extension candidates. Maximal degree in co-relation 2287. Up to 373 conditions per place. [2024-06-20 15:52:22,311 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 77 selfloop transitions, 16 changer transitions 0/95 dead transitions. [2024-06-20 15:52:22,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 95 transitions, 803 flow [2024-06-20 15:52:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 15:52:22,313 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 15:52:22,313 INFO L175 Difference]: Start difference. First operand has 89 places, 71 transitions, 483 flow. Second operand 10 states and 115 transitions. [2024-06-20 15:52:22,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 95 transitions, 803 flow [2024-06-20 15:52:22,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 95 transitions, 777 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:22,327 INFO L231 Difference]: Finished difference. Result has 93 places, 73 transitions, 527 flow [2024-06-20 15:52:22,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=527, PETRI_PLACES=93, PETRI_TRANSITIONS=73} [2024-06-20 15:52:22,328 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 64 predicate places. [2024-06-20 15:52:22,328 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 73 transitions, 527 flow [2024-06-20 15:52:22,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:22,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:22,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:22,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-20 15:52:22,329 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:22,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:22,330 INFO L85 PathProgramCache]: Analyzing trace with hash -1772623256, now seen corresponding path program 1 times [2024-06-20 15:52:22,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:22,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396173634] [2024-06-20 15:52:22,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:22,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:22,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:23,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:23,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:23,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396173634] [2024-06-20 15:52:23,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396173634] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:23,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:23,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:23,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280193054] [2024-06-20 15:52:23,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:23,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:23,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:23,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:23,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:23,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:23,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 73 transitions, 527 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:23,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:23,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:23,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:23,774 INFO L124 PetriNetUnfolderBase]: 261/466 cut-off events. [2024-06-20 15:52:23,774 INFO L125 PetriNetUnfolderBase]: For 9940/9940 co-relation queries the response was YES. [2024-06-20 15:52:23,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2446 conditions, 466 events. 261/466 cut-off events. For 9940/9940 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1799 event pairs, 49 based on Foata normal form. 3/467 useless extension candidates. Maximal degree in co-relation 2401. Up to 401 conditions per place. [2024-06-20 15:52:23,778 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 78 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-06-20 15:52:23,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 99 transitions, 803 flow [2024-06-20 15:52:23,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:52:23,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:52:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-20 15:52:23,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-20 15:52:23,779 INFO L175 Difference]: Start difference. First operand has 93 places, 73 transitions, 527 flow. Second operand 11 states and 126 transitions. [2024-06-20 15:52:23,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 99 transitions, 803 flow [2024-06-20 15:52:23,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 99 transitions, 766 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:23,794 INFO L231 Difference]: Finished difference. Result has 98 places, 76 transitions, 567 flow [2024-06-20 15:52:23,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=490, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=567, PETRI_PLACES=98, PETRI_TRANSITIONS=76} [2024-06-20 15:52:23,795 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 69 predicate places. [2024-06-20 15:52:23,795 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 76 transitions, 567 flow [2024-06-20 15:52:23,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:23,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:23,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:23,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-20 15:52:23,796 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:23,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:23,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1354536038, now seen corresponding path program 2 times [2024-06-20 15:52:23,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:23,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173874307] [2024-06-20 15:52:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:23,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:23,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:24,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:24,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173874307] [2024-06-20 15:52:24,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173874307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:24,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:24,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:24,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117117586] [2024-06-20 15:52:24,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:24,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:24,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:24,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:24,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:24,770 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:24,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 76 transitions, 567 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:24,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:24,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:24,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:25,104 INFO L124 PetriNetUnfolderBase]: 258/461 cut-off events. [2024-06-20 15:52:25,104 INFO L125 PetriNetUnfolderBase]: For 9672/9672 co-relation queries the response was YES. [2024-06-20 15:52:25,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2456 conditions, 461 events. 258/461 cut-off events. For 9672/9672 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1776 event pairs, 50 based on Foata normal form. 2/461 useless extension candidates. Maximal degree in co-relation 2409. Up to 412 conditions per place. [2024-06-20 15:52:25,108 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 79 selfloop transitions, 15 changer transitions 0/96 dead transitions. [2024-06-20 15:52:25,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 96 transitions, 803 flow [2024-06-20 15:52:25,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-20 15:52:25,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37666666666666665 [2024-06-20 15:52:25,110 INFO L175 Difference]: Start difference. First operand has 98 places, 76 transitions, 567 flow. Second operand 10 states and 113 transitions. [2024-06-20 15:52:25,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 96 transitions, 803 flow [2024-06-20 15:52:25,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 96 transitions, 740 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-20 15:52:25,128 INFO L231 Difference]: Finished difference. Result has 99 places, 76 transitions, 538 flow [2024-06-20 15:52:25,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=538, PETRI_PLACES=99, PETRI_TRANSITIONS=76} [2024-06-20 15:52:25,132 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 70 predicate places. [2024-06-20 15:52:25,132 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 76 transitions, 538 flow [2024-06-20 15:52:25,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:25,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:25,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:25,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-20 15:52:25,133 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:25,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:25,133 INFO L85 PathProgramCache]: Analyzing trace with hash 186685272, now seen corresponding path program 2 times [2024-06-20 15:52:25,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:25,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145926113] [2024-06-20 15:52:25,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:25,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:26,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:26,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:26,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145926113] [2024-06-20 15:52:26,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145926113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:26,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:26,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:26,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250144916] [2024-06-20 15:52:26,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:26,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:26,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:26,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:26,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:26,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:26,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 76 transitions, 538 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:26,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:26,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:26,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:26,320 INFO L124 PetriNetUnfolderBase]: 261/466 cut-off events. [2024-06-20 15:52:26,320 INFO L125 PetriNetUnfolderBase]: For 9867/9867 co-relation queries the response was YES. [2024-06-20 15:52:26,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2446 conditions, 466 events. 261/466 cut-off events. For 9867/9867 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1809 event pairs, 40 based on Foata normal form. 1/465 useless extension candidates. Maximal degree in co-relation 2398. Up to 389 conditions per place. [2024-06-20 15:52:26,334 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 73 selfloop transitions, 27 changer transitions 0/102 dead transitions. [2024-06-20 15:52:26,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 102 transitions, 855 flow [2024-06-20 15:52:26,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:26,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:26,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-20 15:52:26,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 15:52:26,336 INFO L175 Difference]: Start difference. First operand has 99 places, 76 transitions, 538 flow. Second operand 9 states and 105 transitions. [2024-06-20 15:52:26,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 102 transitions, 855 flow [2024-06-20 15:52:26,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 102 transitions, 823 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-20 15:52:26,355 INFO L231 Difference]: Finished difference. Result has 102 places, 88 transitions, 679 flow [2024-06-20 15:52:26,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=679, PETRI_PLACES=102, PETRI_TRANSITIONS=88} [2024-06-20 15:52:26,356 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 73 predicate places. [2024-06-20 15:52:26,356 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 88 transitions, 679 flow [2024-06-20 15:52:26,357 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:26,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:26,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:26,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-20 15:52:26,357 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:26,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash 186512292, now seen corresponding path program 3 times [2024-06-20 15:52:26,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:26,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326493851] [2024-06-20 15:52:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:26,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:27,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:27,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:27,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326493851] [2024-06-20 15:52:27,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326493851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:27,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:27,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:27,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685811836] [2024-06-20 15:52:27,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:27,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:27,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:27,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:27,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:27,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:27,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 88 transitions, 679 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:27,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:27,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:27,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:27,500 INFO L124 PetriNetUnfolderBase]: 264/471 cut-off events. [2024-06-20 15:52:27,500 INFO L125 PetriNetUnfolderBase]: For 10757/10757 co-relation queries the response was YES. [2024-06-20 15:52:27,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2623 conditions, 471 events. 264/471 cut-off events. For 10757/10757 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1834 event pairs, 42 based on Foata normal form. 1/470 useless extension candidates. Maximal degree in co-relation 2571. Up to 394 conditions per place. [2024-06-20 15:52:27,503 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 76 selfloop transitions, 27 changer transitions 0/105 dead transitions. [2024-06-20 15:52:27,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 105 transitions, 958 flow [2024-06-20 15:52:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:27,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-20 15:52:27,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3925925925925926 [2024-06-20 15:52:27,504 INFO L175 Difference]: Start difference. First operand has 102 places, 88 transitions, 679 flow. Second operand 9 states and 106 transitions. [2024-06-20 15:52:27,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 105 transitions, 958 flow [2024-06-20 15:52:27,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 105 transitions, 905 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-20 15:52:27,524 INFO L231 Difference]: Finished difference. Result has 107 places, 91 transitions, 720 flow [2024-06-20 15:52:27,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=720, PETRI_PLACES=107, PETRI_TRANSITIONS=91} [2024-06-20 15:52:27,525 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 78 predicate places. [2024-06-20 15:52:27,525 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 91 transitions, 720 flow [2024-06-20 15:52:27,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:27,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:27,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:27,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-20 15:52:27,526 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:27,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:27,526 INFO L85 PathProgramCache]: Analyzing trace with hash 186507642, now seen corresponding path program 4 times [2024-06-20 15:52:27,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:27,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842141316] [2024-06-20 15:52:27,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:27,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:28,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:28,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842141316] [2024-06-20 15:52:28,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842141316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:28,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:28,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:28,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008976394] [2024-06-20 15:52:28,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:28,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:28,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:28,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:28,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:28,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 91 transitions, 720 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:28,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:28,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:28,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:28,741 INFO L124 PetriNetUnfolderBase]: 283/502 cut-off events. [2024-06-20 15:52:28,741 INFO L125 PetriNetUnfolderBase]: For 13465/13465 co-relation queries the response was YES. [2024-06-20 15:52:28,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2907 conditions, 502 events. 283/502 cut-off events. For 13465/13465 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 1977 event pairs, 46 based on Foata normal form. 3/503 useless extension candidates. Maximal degree in co-relation 2854. Up to 331 conditions per place. [2024-06-20 15:52:28,744 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 66 selfloop transitions, 48 changer transitions 0/116 dead transitions. [2024-06-20 15:52:28,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 116 transitions, 1120 flow [2024-06-20 15:52:28,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:28,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:28,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 129 transitions. [2024-06-20 15:52:28,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43 [2024-06-20 15:52:28,745 INFO L175 Difference]: Start difference. First operand has 107 places, 91 transitions, 720 flow. Second operand 10 states and 129 transitions. [2024-06-20 15:52:28,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 116 transitions, 1120 flow [2024-06-20 15:52:28,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 116 transitions, 1063 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:28,761 INFO L231 Difference]: Finished difference. Result has 112 places, 96 transitions, 843 flow [2024-06-20 15:52:28,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=843, PETRI_PLACES=112, PETRI_TRANSITIONS=96} [2024-06-20 15:52:28,762 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 83 predicate places. [2024-06-20 15:52:28,762 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 96 transitions, 843 flow [2024-06-20 15:52:28,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:28,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:28,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:28,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-20 15:52:28,762 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:28,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:28,763 INFO L85 PathProgramCache]: Analyzing trace with hash 186507518, now seen corresponding path program 3 times [2024-06-20 15:52:28,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:28,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926343113] [2024-06-20 15:52:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:28,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:28,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:29,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:29,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:29,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926343113] [2024-06-20 15:52:29,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926343113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:29,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:29,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:29,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312858786] [2024-06-20 15:52:29,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:29,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:29,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:29,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:29,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 96 transitions, 843 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:29,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:29,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:29,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:29,888 INFO L124 PetriNetUnfolderBase]: 287/510 cut-off events. [2024-06-20 15:52:29,888 INFO L125 PetriNetUnfolderBase]: For 14137/14137 co-relation queries the response was YES. [2024-06-20 15:52:29,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3078 conditions, 510 events. 287/510 cut-off events. For 14137/14137 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2037 event pairs, 52 based on Foata normal form. 2/510 useless extension candidates. Maximal degree in co-relation 3024. Up to 457 conditions per place. [2024-06-20 15:52:29,892 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 88 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-06-20 15:52:29,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 110 transitions, 1107 flow [2024-06-20 15:52:29,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:29,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:29,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-20 15:52:29,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-20 15:52:29,894 INFO L175 Difference]: Start difference. First operand has 112 places, 96 transitions, 843 flow. Second operand 9 states and 102 transitions. [2024-06-20 15:52:29,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 110 transitions, 1107 flow [2024-06-20 15:52:29,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 110 transitions, 1028 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:29,940 INFO L231 Difference]: Finished difference. Result has 115 places, 97 transitions, 828 flow [2024-06-20 15:52:29,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=828, PETRI_PLACES=115, PETRI_TRANSITIONS=97} [2024-06-20 15:52:29,940 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 86 predicate places. [2024-06-20 15:52:29,940 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 97 transitions, 828 flow [2024-06-20 15:52:29,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:29,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:29,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:29,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-20 15:52:29,941 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:29,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:29,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1705690926, now seen corresponding path program 5 times [2024-06-20 15:52:29,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:29,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565247197] [2024-06-20 15:52:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:29,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:29,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:30,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:30,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565247197] [2024-06-20 15:52:30,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565247197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:30,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:30,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:30,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489023696] [2024-06-20 15:52:30,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:30,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:30,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:30,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:30,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:30,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 97 transitions, 828 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:30,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:30,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:30,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:31,008 INFO L124 PetriNetUnfolderBase]: 290/515 cut-off events. [2024-06-20 15:52:31,008 INFO L125 PetriNetUnfolderBase]: For 14265/14265 co-relation queries the response was YES. [2024-06-20 15:52:31,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3112 conditions, 515 events. 290/515 cut-off events. For 14265/14265 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2065 event pairs, 45 based on Foata normal form. 1/514 useless extension candidates. Maximal degree in co-relation 3056. Up to 477 conditions per place. [2024-06-20 15:52:31,010 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 91 selfloop transitions, 19 changer transitions 0/112 dead transitions. [2024-06-20 15:52:31,011 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 112 transitions, 1120 flow [2024-06-20 15:52:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:31,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:31,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-20 15:52:31,012 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 15:52:31,012 INFO L175 Difference]: Start difference. First operand has 115 places, 97 transitions, 828 flow. Second operand 9 states and 99 transitions. [2024-06-20 15:52:31,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 112 transitions, 1120 flow [2024-06-20 15:52:31,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 112 transitions, 1066 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:31,030 INFO L231 Difference]: Finished difference. Result has 118 places, 102 transitions, 873 flow [2024-06-20 15:52:31,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=774, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=873, PETRI_PLACES=118, PETRI_TRANSITIONS=102} [2024-06-20 15:52:31,031 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 89 predicate places. [2024-06-20 15:52:31,031 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 102 transitions, 873 flow [2024-06-20 15:52:31,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:31,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:31,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:31,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-20 15:52:31,032 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:31,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:31,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1719577628, now seen corresponding path program 1 times [2024-06-20 15:52:31,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:31,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200113237] [2024-06-20 15:52:31,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:31,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:31,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:31,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:31,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:31,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200113237] [2024-06-20 15:52:31,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200113237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:31,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:31,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:31,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100357597] [2024-06-20 15:52:31,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:31,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:31,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:31,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:31,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:32,015 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:32,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 102 transitions, 873 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:32,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:32,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:32,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:32,305 INFO L124 PetriNetUnfolderBase]: 286/509 cut-off events. [2024-06-20 15:52:32,305 INFO L125 PetriNetUnfolderBase]: For 14487/14487 co-relation queries the response was YES. [2024-06-20 15:52:32,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3051 conditions, 509 events. 286/509 cut-off events. For 14487/14487 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2036 event pairs, 42 based on Foata normal form. 2/509 useless extension candidates. Maximal degree in co-relation 2993. Up to 473 conditions per place. [2024-06-20 15:52:32,308 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 100 selfloop transitions, 14 changer transitions 0/116 dead transitions. [2024-06-20 15:52:32,308 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 116 transitions, 1155 flow [2024-06-20 15:52:32,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:32,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:32,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-20 15:52:32,309 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362962962962963 [2024-06-20 15:52:32,310 INFO L175 Difference]: Start difference. First operand has 118 places, 102 transitions, 873 flow. Second operand 9 states and 98 transitions. [2024-06-20 15:52:32,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 116 transitions, 1155 flow [2024-06-20 15:52:32,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 116 transitions, 1098 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-20 15:52:32,328 INFO L231 Difference]: Finished difference. Result has 122 places, 104 transitions, 881 flow [2024-06-20 15:52:32,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=816, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=881, PETRI_PLACES=122, PETRI_TRANSITIONS=104} [2024-06-20 15:52:32,329 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 93 predicate places. [2024-06-20 15:52:32,329 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 104 transitions, 881 flow [2024-06-20 15:52:32,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:32,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:32,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:32,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-20 15:52:32,330 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:32,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:32,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1483222592, now seen corresponding path program 6 times [2024-06-20 15:52:32,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:32,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908551410] [2024-06-20 15:52:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:32,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:32,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:33,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:33,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:33,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908551410] [2024-06-20 15:52:33,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908551410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:33,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:33,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:33,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741172510] [2024-06-20 15:52:33,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:33,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:33,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:33,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:33,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:33,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:33,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 104 transitions, 881 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:33,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:33,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:33,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:33,393 INFO L124 PetriNetUnfolderBase]: 289/514 cut-off events. [2024-06-20 15:52:33,393 INFO L125 PetriNetUnfolderBase]: For 14718/14718 co-relation queries the response was YES. [2024-06-20 15:52:33,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3105 conditions, 514 events. 289/514 cut-off events. For 14718/14718 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2082 event pairs, 42 based on Foata normal form. 1/513 useless extension candidates. Maximal degree in co-relation 3046. Up to 476 conditions per place. [2024-06-20 15:52:33,396 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 94 selfloop transitions, 22 changer transitions 0/118 dead transitions. [2024-06-20 15:52:33,396 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 118 transitions, 1183 flow [2024-06-20 15:52:33,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 98 transitions. [2024-06-20 15:52:33,397 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.362962962962963 [2024-06-20 15:52:33,397 INFO L175 Difference]: Start difference. First operand has 122 places, 104 transitions, 881 flow. Second operand 9 states and 98 transitions. [2024-06-20 15:52:33,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 118 transitions, 1183 flow [2024-06-20 15:52:33,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 118 transitions, 1134 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:33,418 INFO L231 Difference]: Finished difference. Result has 125 places, 109 transitions, 944 flow [2024-06-20 15:52:33,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=832, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=944, PETRI_PLACES=125, PETRI_TRANSITIONS=109} [2024-06-20 15:52:33,419 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 96 predicate places. [2024-06-20 15:52:33,419 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 109 transitions, 944 flow [2024-06-20 15:52:33,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:33,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:33,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:33,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-20 15:52:33,420 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:33,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:33,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1711296722, now seen corresponding path program 7 times [2024-06-20 15:52:33,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:33,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945379856] [2024-06-20 15:52:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:33,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:34,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:34,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:34,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945379856] [2024-06-20 15:52:34,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945379856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:34,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:34,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:34,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705126455] [2024-06-20 15:52:34,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:34,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:34,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:34,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:34,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:34,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:34,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 109 transitions, 944 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:34,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:34,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:34,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:34,449 INFO L124 PetriNetUnfolderBase]: 298/529 cut-off events. [2024-06-20 15:52:34,449 INFO L125 PetriNetUnfolderBase]: For 17035/17035 co-relation queries the response was YES. [2024-06-20 15:52:34,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3270 conditions, 529 events. 298/529 cut-off events. For 17035/17035 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2148 event pairs, 42 based on Foata normal form. 3/530 useless extension candidates. Maximal degree in co-relation 3209. Up to 482 conditions per place. [2024-06-20 15:52:34,452 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 105 selfloop transitions, 17 changer transitions 0/124 dead transitions. [2024-06-20 15:52:34,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 124 transitions, 1268 flow [2024-06-20 15:52:34,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:34,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 101 transitions. [2024-06-20 15:52:34,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37407407407407406 [2024-06-20 15:52:34,454 INFO L175 Difference]: Start difference. First operand has 125 places, 109 transitions, 944 flow. Second operand 9 states and 101 transitions. [2024-06-20 15:52:34,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 124 transitions, 1268 flow [2024-06-20 15:52:34,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 124 transitions, 1218 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-20 15:52:34,479 INFO L231 Difference]: Finished difference. Result has 130 places, 112 transitions, 995 flow [2024-06-20 15:52:34,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=995, PETRI_PLACES=130, PETRI_TRANSITIONS=112} [2024-06-20 15:52:34,480 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 101 predicate places. [2024-06-20 15:52:34,480 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 112 transitions, 995 flow [2024-06-20 15:52:34,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:34,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:34,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:34,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-20 15:52:34,481 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:34,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:34,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1483217818, now seen corresponding path program 4 times [2024-06-20 15:52:34,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:34,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671878074] [2024-06-20 15:52:34,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:34,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:34,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:35,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:35,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:35,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671878074] [2024-06-20 15:52:35,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671878074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:35,214 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:35,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:35,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88977237] [2024-06-20 15:52:35,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:35,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:35,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:35,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:35,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:35,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:35,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 112 transitions, 995 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:35,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:35,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:35,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:35,520 INFO L124 PetriNetUnfolderBase]: 295/524 cut-off events. [2024-06-20 15:52:35,521 INFO L125 PetriNetUnfolderBase]: For 15994/15994 co-relation queries the response was YES. [2024-06-20 15:52:35,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3221 conditions, 524 events. 295/524 cut-off events. For 15994/15994 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2116 event pairs, 45 based on Foata normal form. 2/524 useless extension candidates. Maximal degree in co-relation 3159. Up to 498 conditions per place. [2024-06-20 15:52:35,523 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 107 selfloop transitions, 13 changer transitions 0/122 dead transitions. [2024-06-20 15:52:35,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 122 transitions, 1257 flow [2024-06-20 15:52:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:35,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-20 15:52:35,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-20 15:52:35,526 INFO L175 Difference]: Start difference. First operand has 130 places, 112 transitions, 995 flow. Second operand 9 states and 95 transitions. [2024-06-20 15:52:35,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 122 transitions, 1257 flow [2024-06-20 15:52:35,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 122 transitions, 1180 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:35,553 INFO L231 Difference]: Finished difference. Result has 132 places, 112 transitions, 948 flow [2024-06-20 15:52:35,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=918, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=948, PETRI_PLACES=132, PETRI_TRANSITIONS=112} [2024-06-20 15:52:35,554 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 103 predicate places. [2024-06-20 15:52:35,554 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 112 transitions, 948 flow [2024-06-20 15:52:35,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:35,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:35,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:35,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-20 15:52:35,554 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:35,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:35,555 INFO L85 PathProgramCache]: Analyzing trace with hash 352146776, now seen corresponding path program 8 times [2024-06-20 15:52:35,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:35,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021925532] [2024-06-20 15:52:35,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:35,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:36,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:36,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021925532] [2024-06-20 15:52:36,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021925532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:36,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:36,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:52:36,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055405648] [2024-06-20 15:52:36,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:36,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:52:36,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:36,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:52:36,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:52:36,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:36,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 112 transitions, 948 flow. Second operand has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:36,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:36,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:36,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:36,730 INFO L124 PetriNetUnfolderBase]: 309/547 cut-off events. [2024-06-20 15:52:36,730 INFO L125 PetriNetUnfolderBase]: For 18295/18295 co-relation queries the response was YES. [2024-06-20 15:52:36,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3371 conditions, 547 events. 309/547 cut-off events. For 18295/18295 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2249 event pairs, 41 based on Foata normal form. 3/548 useless extension candidates. Maximal degree in co-relation 3308. Up to 432 conditions per place. [2024-06-20 15:52:36,734 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 92 selfloop transitions, 39 changer transitions 0/133 dead transitions. [2024-06-20 15:52:36,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 133 transitions, 1422 flow [2024-06-20 15:52:36,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:36,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:36,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 15:52:36,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2024-06-20 15:52:36,735 INFO L175 Difference]: Start difference. First operand has 132 places, 112 transitions, 948 flow. Second operand 10 states and 119 transitions. [2024-06-20 15:52:36,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 133 transitions, 1422 flow [2024-06-20 15:52:36,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 133 transitions, 1355 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 15:52:36,767 INFO L231 Difference]: Finished difference. Result has 133 places, 117 transitions, 1079 flow [2024-06-20 15:52:36,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=881, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1079, PETRI_PLACES=133, PETRI_TRANSITIONS=117} [2024-06-20 15:52:36,767 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 104 predicate places. [2024-06-20 15:52:36,767 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 117 transitions, 1079 flow [2024-06-20 15:52:36,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.3) internal successors, (73), 10 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:36,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:36,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:36,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-20 15:52:36,768 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:36,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash 2119142404, now seen corresponding path program 1 times [2024-06-20 15:52:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:36,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405264306] [2024-06-20 15:52:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:37,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:37,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:37,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405264306] [2024-06-20 15:52:37,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405264306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:37,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:37,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:37,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969211433] [2024-06-20 15:52:37,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:37,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:37,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:37,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:37,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:37,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:37,680 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 117 transitions, 1079 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:37,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:37,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:37,680 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:38,088 INFO L124 PetriNetUnfolderBase]: 349/627 cut-off events. [2024-06-20 15:52:38,088 INFO L125 PetriNetUnfolderBase]: For 27658/27658 co-relation queries the response was YES. [2024-06-20 15:52:38,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4273 conditions, 627 events. 349/627 cut-off events. For 27658/27658 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2708 event pairs, 44 based on Foata normal form. 2/627 useless extension candidates. Maximal degree in co-relation 4210. Up to 444 conditions per place. [2024-06-20 15:52:38,091 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 127 selfloop transitions, 21 changer transitions 0/150 dead transitions. [2024-06-20 15:52:38,091 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 150 transitions, 1605 flow [2024-06-20 15:52:38,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:52:38,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:52:38,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-20 15:52:38,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-06-20 15:52:38,092 INFO L175 Difference]: Start difference. First operand has 133 places, 117 transitions, 1079 flow. Second operand 11 states and 135 transitions. [2024-06-20 15:52:38,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 150 transitions, 1605 flow [2024-06-20 15:52:38,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 150 transitions, 1490 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-20 15:52:38,129 INFO L231 Difference]: Finished difference. Result has 136 places, 119 transitions, 1048 flow [2024-06-20 15:52:38,129 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1048, PETRI_PLACES=136, PETRI_TRANSITIONS=119} [2024-06-20 15:52:38,129 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 107 predicate places. [2024-06-20 15:52:38,129 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 119 transitions, 1048 flow [2024-06-20 15:52:38,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:38,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:38,130 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:38,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-20 15:52:38,130 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:38,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:38,130 INFO L85 PathProgramCache]: Analyzing trace with hash 2121020229, now seen corresponding path program 1 times [2024-06-20 15:52:38,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:38,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539414012] [2024-06-20 15:52:38,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:38,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:39,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:39,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539414012] [2024-06-20 15:52:39,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539414012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:39,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:39,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:39,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315034986] [2024-06-20 15:52:39,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:39,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:39,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:39,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:39,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:39,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:39,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 119 transitions, 1048 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:39,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:39,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:39,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:39,596 INFO L124 PetriNetUnfolderBase]: 355/637 cut-off events. [2024-06-20 15:52:39,596 INFO L125 PetriNetUnfolderBase]: For 28699/28699 co-relation queries the response was YES. [2024-06-20 15:52:39,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4294 conditions, 637 events. 355/637 cut-off events. For 28699/28699 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2763 event pairs, 63 based on Foata normal form. 2/637 useless extension candidates. Maximal degree in co-relation 4231. Up to 566 conditions per place. [2024-06-20 15:52:39,600 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 122 selfloop transitions, 23 changer transitions 0/147 dead transitions. [2024-06-20 15:52:39,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 147 transitions, 1450 flow [2024-06-20 15:52:39,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:52:39,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:52:39,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 144 transitions. [2024-06-20 15:52:39,610 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36923076923076925 [2024-06-20 15:52:39,610 INFO L175 Difference]: Start difference. First operand has 136 places, 119 transitions, 1048 flow. Second operand 13 states and 144 transitions. [2024-06-20 15:52:39,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 147 transitions, 1450 flow [2024-06-20 15:52:39,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 147 transitions, 1405 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:39,671 INFO L231 Difference]: Finished difference. Result has 143 places, 122 transitions, 1117 flow [2024-06-20 15:52:39,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1117, PETRI_PLACES=143, PETRI_TRANSITIONS=122} [2024-06-20 15:52:39,672 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 114 predicate places. [2024-06-20 15:52:39,672 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 122 transitions, 1117 flow [2024-06-20 15:52:39,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:39,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:39,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:39,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-20 15:52:39,673 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:39,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:39,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2121020074, now seen corresponding path program 2 times [2024-06-20 15:52:39,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:39,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680908442] [2024-06-20 15:52:39,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:39,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:40,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:40,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680908442] [2024-06-20 15:52:40,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680908442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:40,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:40,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:40,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258659847] [2024-06-20 15:52:40,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:40,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:40,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:40,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:40,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:40,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:40,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 122 transitions, 1117 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:40,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:40,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:40,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:41,240 INFO L124 PetriNetUnfolderBase]: 358/650 cut-off events. [2024-06-20 15:52:41,241 INFO L125 PetriNetUnfolderBase]: For 36535/36535 co-relation queries the response was YES. [2024-06-20 15:52:41,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4053 conditions, 650 events. 358/650 cut-off events. For 36535/36535 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2886 event pairs, 58 based on Foata normal form. 20/668 useless extension candidates. Maximal degree in co-relation 3987. Up to 507 conditions per place. [2024-06-20 15:52:41,245 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 121 selfloop transitions, 18 changer transitions 11/152 dead transitions. [2024-06-20 15:52:41,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 152 transitions, 1559 flow [2024-06-20 15:52:41,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:52:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:52:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-20 15:52:41,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 15:52:41,246 INFO L175 Difference]: Start difference. First operand has 143 places, 122 transitions, 1117 flow. Second operand 12 states and 140 transitions. [2024-06-20 15:52:41,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 152 transitions, 1559 flow [2024-06-20 15:52:41,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 152 transitions, 1472 flow, removed 23 selfloop flow, removed 10 redundant places. [2024-06-20 15:52:41,310 INFO L231 Difference]: Finished difference. Result has 145 places, 119 transitions, 1061 flow [2024-06-20 15:52:41,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1030, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1061, PETRI_PLACES=145, PETRI_TRANSITIONS=119} [2024-06-20 15:52:41,310 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 116 predicate places. [2024-06-20 15:52:41,310 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 119 transitions, 1061 flow [2024-06-20 15:52:41,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:41,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:41,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:41,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-20 15:52:41,311 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:41,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:41,312 INFO L85 PathProgramCache]: Analyzing trace with hash 1344664068, now seen corresponding path program 3 times [2024-06-20 15:52:41,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:41,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705533204] [2024-06-20 15:52:41,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:41,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:41,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:42,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:42,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:42,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705533204] [2024-06-20 15:52:42,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705533204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:42,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:42,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:42,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113978288] [2024-06-20 15:52:42,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:42,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:42,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:42,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:42,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:42,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:42,385 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 119 transitions, 1061 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:42,385 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:42,385 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:42,385 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:42,680 INFO L124 PetriNetUnfolderBase]: 334/598 cut-off events. [2024-06-20 15:52:42,680 INFO L125 PetriNetUnfolderBase]: For 23595/23595 co-relation queries the response was YES. [2024-06-20 15:52:42,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3796 conditions, 598 events. 334/598 cut-off events. For 23595/23595 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2584 event pairs, 48 based on Foata normal form. 2/598 useless extension candidates. Maximal degree in co-relation 3729. Up to 523 conditions per place. [2024-06-20 15:52:42,684 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 125 selfloop transitions, 21 changer transitions 0/148 dead transitions. [2024-06-20 15:52:42,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 148 transitions, 1482 flow [2024-06-20 15:52:42,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:52:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:52:42,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-20 15:52:42,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-20 15:52:42,685 INFO L175 Difference]: Start difference. First operand has 145 places, 119 transitions, 1061 flow. Second operand 11 states and 126 transitions. [2024-06-20 15:52:42,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 148 transitions, 1482 flow [2024-06-20 15:52:42,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 148 transitions, 1412 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-20 15:52:42,722 INFO L231 Difference]: Finished difference. Result has 146 places, 125 transitions, 1119 flow [2024-06-20 15:52:42,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1119, PETRI_PLACES=146, PETRI_TRANSITIONS=125} [2024-06-20 15:52:42,723 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 117 predicate places. [2024-06-20 15:52:42,723 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 125 transitions, 1119 flow [2024-06-20 15:52:42,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:42,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:42,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:42,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-20 15:52:42,724 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:42,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:42,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2087259132, now seen corresponding path program 4 times [2024-06-20 15:52:42,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:42,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877673913] [2024-06-20 15:52:42,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:42,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:43,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:43,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:43,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877673913] [2024-06-20 15:52:43,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877673913] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:43,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:43,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:43,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707754040] [2024-06-20 15:52:43,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:43,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:43,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:43,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:43,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:43,760 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:43,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 125 transitions, 1119 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:43,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:43,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:43,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:44,023 INFO L124 PetriNetUnfolderBase]: 331/593 cut-off events. [2024-06-20 15:52:44,024 INFO L125 PetriNetUnfolderBase]: For 22760/22760 co-relation queries the response was YES. [2024-06-20 15:52:44,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3680 conditions, 593 events. 331/593 cut-off events. For 22760/22760 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2561 event pairs, 47 based on Foata normal form. 2/593 useless extension candidates. Maximal degree in co-relation 3611. Up to 533 conditions per place. [2024-06-20 15:52:44,027 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 126 selfloop transitions, 16 changer transitions 0/144 dead transitions. [2024-06-20 15:52:44,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 144 transitions, 1450 flow [2024-06-20 15:52:44,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:44,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:44,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-20 15:52:44,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2024-06-20 15:52:44,029 INFO L175 Difference]: Start difference. First operand has 146 places, 125 transitions, 1119 flow. Second operand 10 states and 112 transitions. [2024-06-20 15:52:44,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 144 transitions, 1450 flow [2024-06-20 15:52:44,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 144 transitions, 1396 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:44,067 INFO L231 Difference]: Finished difference. Result has 150 places, 125 transitions, 1101 flow [2024-06-20 15:52:44,067 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1065, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1101, PETRI_PLACES=150, PETRI_TRANSITIONS=125} [2024-06-20 15:52:44,068 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 121 predicate places. [2024-06-20 15:52:44,068 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 125 transitions, 1101 flow [2024-06-20 15:52:44,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:44,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:44,068 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:44,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-20 15:52:44,069 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:44,069 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:44,069 INFO L85 PathProgramCache]: Analyzing trace with hash 324955812, now seen corresponding path program 5 times [2024-06-20 15:52:44,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:44,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361041956] [2024-06-20 15:52:44,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:44,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:44,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:44,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:44,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361041956] [2024-06-20 15:52:44,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361041956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:44,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:44,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:44,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116726383] [2024-06-20 15:52:44,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:44,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:44,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:44,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:44,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:44,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:44,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 125 transitions, 1101 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:44,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:44,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:44,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:45,144 INFO L124 PetriNetUnfolderBase]: 335/601 cut-off events. [2024-06-20 15:52:45,144 INFO L125 PetriNetUnfolderBase]: For 23620/23620 co-relation queries the response was YES. [2024-06-20 15:52:45,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3705 conditions, 601 events. 335/601 cut-off events. For 23620/23620 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 2603 event pairs, 53 based on Foata normal form. 2/601 useless extension candidates. Maximal degree in co-relation 3635. Up to 518 conditions per place. [2024-06-20 15:52:45,148 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 106 selfloop transitions, 32 changer transitions 0/140 dead transitions. [2024-06-20 15:52:45,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 140 transitions, 1429 flow [2024-06-20 15:52:45,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:45,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 15:52:45,149 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 15:52:45,149 INFO L175 Difference]: Start difference. First operand has 150 places, 125 transitions, 1101 flow. Second operand 10 states and 115 transitions. [2024-06-20 15:52:45,149 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 140 transitions, 1429 flow [2024-06-20 15:52:45,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 140 transitions, 1378 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 15:52:45,191 INFO L231 Difference]: Finished difference. Result has 151 places, 126 transitions, 1140 flow [2024-06-20 15:52:45,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1140, PETRI_PLACES=151, PETRI_TRANSITIONS=126} [2024-06-20 15:52:45,192 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2024-06-20 15:52:45,192 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 126 transitions, 1140 flow [2024-06-20 15:52:45,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:45,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:45,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:45,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-20 15:52:45,192 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:45,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:45,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1025502539, now seen corresponding path program 2 times [2024-06-20 15:52:45,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:45,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380649787] [2024-06-20 15:52:45,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:45,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:45,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:46,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:46,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380649787] [2024-06-20 15:52:46,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380649787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:46,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:46,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:46,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733607198] [2024-06-20 15:52:46,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:46,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:46,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:46,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:46,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:46,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:46,257 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 126 transitions, 1140 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:46,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:46,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:46,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:46,563 INFO L124 PetriNetUnfolderBase]: 341/611 cut-off events. [2024-06-20 15:52:46,563 INFO L125 PetriNetUnfolderBase]: For 25111/25111 co-relation queries the response was YES. [2024-06-20 15:52:46,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3822 conditions, 611 events. 341/611 cut-off events. For 25111/25111 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 2660 event pairs, 39 based on Foata normal form. 2/611 useless extension candidates. Maximal degree in co-relation 3752. Up to 438 conditions per place. [2024-06-20 15:52:46,566 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 102 selfloop transitions, 45 changer transitions 0/149 dead transitions. [2024-06-20 15:52:46,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 149 transitions, 1537 flow [2024-06-20 15:52:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:46,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:46,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-20 15:52:46,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-06-20 15:52:46,567 INFO L175 Difference]: Start difference. First operand has 151 places, 126 transitions, 1140 flow. Second operand 10 states and 128 transitions. [2024-06-20 15:52:46,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 149 transitions, 1537 flow [2024-06-20 15:52:46,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 149 transitions, 1457 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-20 15:52:46,616 INFO L231 Difference]: Finished difference. Result has 154 places, 129 transitions, 1226 flow [2024-06-20 15:52:46,617 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1226, PETRI_PLACES=154, PETRI_TRANSITIONS=129} [2024-06-20 15:52:46,617 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 125 predicate places. [2024-06-20 15:52:46,617 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 129 transitions, 1226 flow [2024-06-20 15:52:46,617 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:46,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:46,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:46,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-20 15:52:46,618 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:46,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash 324807942, now seen corresponding path program 6 times [2024-06-20 15:52:46,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:46,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674794607] [2024-06-20 15:52:46,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:46,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:47,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:47,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674794607] [2024-06-20 15:52:47,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674794607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:47,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:47,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:47,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757926472] [2024-06-20 15:52:47,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:47,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:47,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:47,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:47,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:47,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:47,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 129 transitions, 1226 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:47,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:47,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:47,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:47,805 INFO L124 PetriNetUnfolderBase]: 352/632 cut-off events. [2024-06-20 15:52:47,805 INFO L125 PetriNetUnfolderBase]: For 28673/28673 co-relation queries the response was YES. [2024-06-20 15:52:47,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4127 conditions, 632 events. 352/632 cut-off events. For 28673/28673 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2804 event pairs, 54 based on Foata normal form. 2/632 useless extension candidates. Maximal degree in co-relation 4055. Up to 515 conditions per place. [2024-06-20 15:52:47,808 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 106 selfloop transitions, 39 changer transitions 0/147 dead transitions. [2024-06-20 15:52:47,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 147 transitions, 1686 flow [2024-06-20 15:52:47,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:47,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:47,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-20 15:52:47,810 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2024-06-20 15:52:47,810 INFO L175 Difference]: Start difference. First operand has 154 places, 129 transitions, 1226 flow. Second operand 10 states and 118 transitions. [2024-06-20 15:52:47,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 147 transitions, 1686 flow [2024-06-20 15:52:47,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 147 transitions, 1557 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:47,860 INFO L231 Difference]: Finished difference. Result has 157 places, 131 transitions, 1225 flow [2024-06-20 15:52:47,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1097, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1225, PETRI_PLACES=157, PETRI_TRANSITIONS=131} [2024-06-20 15:52:47,861 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 128 predicate places. [2024-06-20 15:52:47,861 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 131 transitions, 1225 flow [2024-06-20 15:52:47,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:47,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:47,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:47,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-20 15:52:47,861 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:47,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:47,862 INFO L85 PathProgramCache]: Analyzing trace with hash 324811662, now seen corresponding path program 7 times [2024-06-20 15:52:47,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:47,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626905984] [2024-06-20 15:52:47,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:47,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:48,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:48,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626905984] [2024-06-20 15:52:48,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626905984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:48,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:48,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:48,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085021090] [2024-06-20 15:52:48,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:48,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:48,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:48,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:48,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:48,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:48,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 131 transitions, 1225 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:48,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:48,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:48,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:49,256 INFO L124 PetriNetUnfolderBase]: 376/684 cut-off events. [2024-06-20 15:52:49,256 INFO L125 PetriNetUnfolderBase]: For 42450/42450 co-relation queries the response was YES. [2024-06-20 15:52:49,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4346 conditions, 684 events. 376/684 cut-off events. For 42450/42450 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3124 event pairs, 45 based on Foata normal form. 14/696 useless extension candidates. Maximal degree in co-relation 4273. Up to 455 conditions per place. [2024-06-20 15:52:49,260 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 100 selfloop transitions, 45 changer transitions 12/159 dead transitions. [2024-06-20 15:52:49,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 159 transitions, 1775 flow [2024-06-20 15:52:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:52:49,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:52:49,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-20 15:52:49,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-20 15:52:49,261 INFO L175 Difference]: Start difference. First operand has 157 places, 131 transitions, 1225 flow. Second operand 11 states and 143 transitions. [2024-06-20 15:52:49,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 159 transitions, 1775 flow [2024-06-20 15:52:49,311 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 159 transitions, 1688 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:49,313 INFO L231 Difference]: Finished difference. Result has 162 places, 127 transitions, 1221 flow [2024-06-20 15:52:49,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1142, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1221, PETRI_PLACES=162, PETRI_TRANSITIONS=127} [2024-06-20 15:52:49,314 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2024-06-20 15:52:49,314 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 127 transitions, 1221 flow [2024-06-20 15:52:49,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:49,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:49,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:49,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-20 15:52:49,315 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:49,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:49,315 INFO L85 PathProgramCache]: Analyzing trace with hash 324811817, now seen corresponding path program 3 times [2024-06-20 15:52:49,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:49,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878063279] [2024-06-20 15:52:49,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:49,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:49,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:50,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:50,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:50,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878063279] [2024-06-20 15:52:50,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878063279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:50,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:50,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:50,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936136562] [2024-06-20 15:52:50,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:50,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:50,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:50,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:50,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:50,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:50,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 127 transitions, 1221 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:50,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:50,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:50,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:50,799 INFO L124 PetriNetUnfolderBase]: 358/644 cut-off events. [2024-06-20 15:52:50,799 INFO L125 PetriNetUnfolderBase]: For 33815/33815 co-relation queries the response was YES. [2024-06-20 15:52:50,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4408 conditions, 644 events. 358/644 cut-off events. For 33815/33815 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 2878 event pairs, 46 based on Foata normal form. 2/644 useless extension candidates. Maximal degree in co-relation 4334. Up to 472 conditions per place. [2024-06-20 15:52:50,803 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 101 selfloop transitions, 48 changer transitions 0/151 dead transitions. [2024-06-20 15:52:50,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 151 transitions, 1769 flow [2024-06-20 15:52:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:52:50,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:52:50,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-20 15:52:50,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40606060606060607 [2024-06-20 15:52:50,804 INFO L175 Difference]: Start difference. First operand has 162 places, 127 transitions, 1221 flow. Second operand 11 states and 134 transitions. [2024-06-20 15:52:50,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 151 transitions, 1769 flow [2024-06-20 15:52:50,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 151 transitions, 1649 flow, removed 8 selfloop flow, removed 13 redundant places. [2024-06-20 15:52:50,862 INFO L231 Difference]: Finished difference. Result has 160 places, 131 transitions, 1321 flow [2024-06-20 15:52:50,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1101, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1321, PETRI_PLACES=160, PETRI_TRANSITIONS=131} [2024-06-20 15:52:50,862 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 131 predicate places. [2024-06-20 15:52:50,862 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 131 transitions, 1321 flow [2024-06-20 15:52:50,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:50,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:50,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:50,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-20 15:52:50,863 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:50,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:50,863 INFO L85 PathProgramCache]: Analyzing trace with hash 330533673, now seen corresponding path program 1 times [2024-06-20 15:52:50,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:50,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798566021] [2024-06-20 15:52:50,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:50,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:51,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:51,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798566021] [2024-06-20 15:52:51,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798566021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:51,806 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:51,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:51,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242001036] [2024-06-20 15:52:51,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:51,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:51,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:51,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:51,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:51,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:51,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 131 transitions, 1321 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:51,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:51,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:51,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:52,122 INFO L124 PetriNetUnfolderBase]: 362/652 cut-off events. [2024-06-20 15:52:52,122 INFO L125 PetriNetUnfolderBase]: For 35322/35322 co-relation queries the response was YES. [2024-06-20 15:52:52,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4462 conditions, 652 events. 362/652 cut-off events. For 35322/35322 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2929 event pairs, 53 based on Foata normal form. 2/652 useless extension candidates. Maximal degree in co-relation 4388. Up to 590 conditions per place. [2024-06-20 15:52:52,126 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 123 selfloop transitions, 22 changer transitions 0/147 dead transitions. [2024-06-20 15:52:52,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 147 transitions, 1651 flow [2024-06-20 15:52:52,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:52,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:52,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-20 15:52:52,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-20 15:52:52,127 INFO L175 Difference]: Start difference. First operand has 160 places, 131 transitions, 1321 flow. Second operand 9 states and 105 transitions. [2024-06-20 15:52:52,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 147 transitions, 1651 flow [2024-06-20 15:52:52,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 147 transitions, 1542 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:52,194 INFO L231 Difference]: Finished difference. Result has 162 places, 132 transitions, 1268 flow [2024-06-20 15:52:52,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1212, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1268, PETRI_PLACES=162, PETRI_TRANSITIONS=132} [2024-06-20 15:52:52,194 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2024-06-20 15:52:52,194 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 132 transitions, 1268 flow [2024-06-20 15:52:52,194 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:52,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:52,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:52,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-20 15:52:52,195 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:52,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:52,195 INFO L85 PathProgramCache]: Analyzing trace with hash 330525737, now seen corresponding path program 4 times [2024-06-20 15:52:52,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:52,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500916937] [2024-06-20 15:52:52,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:52,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:52,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:53,471 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:53,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500916937] [2024-06-20 15:52:53,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500916937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:53,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:53,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:53,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976771698] [2024-06-20 15:52:53,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:53,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:53,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:53,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:53,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:53,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:53,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 132 transitions, 1268 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:53,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:53,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:53,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:53,950 INFO L124 PetriNetUnfolderBase]: 374/672 cut-off events. [2024-06-20 15:52:53,950 INFO L125 PetriNetUnfolderBase]: For 36102/36102 co-relation queries the response was YES. [2024-06-20 15:52:53,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4533 conditions, 672 events. 374/672 cut-off events. For 36102/36102 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3054 event pairs, 45 based on Foata normal form. 2/672 useless extension candidates. Maximal degree in co-relation 4457. Up to 532 conditions per place. [2024-06-20 15:52:53,955 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 112 selfloop transitions, 39 changer transitions 0/153 dead transitions. [2024-06-20 15:52:53,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 153 transitions, 1658 flow [2024-06-20 15:52:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:53,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 15:52:53,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:52:53,956 INFO L175 Difference]: Start difference. First operand has 162 places, 132 transitions, 1268 flow. Second operand 10 states and 120 transitions. [2024-06-20 15:52:53,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 153 transitions, 1658 flow [2024-06-20 15:52:54,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 153 transitions, 1587 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:52:54,021 INFO L231 Difference]: Finished difference. Result has 162 places, 136 transitions, 1334 flow [2024-06-20 15:52:54,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1197, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1334, PETRI_PLACES=162, PETRI_TRANSITIONS=136} [2024-06-20 15:52:54,022 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 133 predicate places. [2024-06-20 15:52:54,022 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 136 transitions, 1334 flow [2024-06-20 15:52:54,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:54,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:54,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:54,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-20 15:52:54,022 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:54,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:54,023 INFO L85 PathProgramCache]: Analyzing trace with hash 330323927, now seen corresponding path program 5 times [2024-06-20 15:52:54,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:54,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266826114] [2024-06-20 15:52:54,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:54,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:55,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:55,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266826114] [2024-06-20 15:52:55,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266826114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:55,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:55,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:55,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691796532] [2024-06-20 15:52:55,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:55,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:55,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:55,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:55,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:55,274 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:55,274 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 136 transitions, 1334 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:55,274 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:55,274 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:55,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:55,590 INFO L124 PetriNetUnfolderBase]: 370/666 cut-off events. [2024-06-20 15:52:55,590 INFO L125 PetriNetUnfolderBase]: For 34912/34912 co-relation queries the response was YES. [2024-06-20 15:52:55,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4444 conditions, 666 events. 370/666 cut-off events. For 34912/34912 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3018 event pairs, 46 based on Foata normal form. 2/666 useless extension candidates. Maximal degree in co-relation 4369. Up to 526 conditions per place. [2024-06-20 15:52:55,594 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 113 selfloop transitions, 39 changer transitions 0/154 dead transitions. [2024-06-20 15:52:55,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 154 transitions, 1678 flow [2024-06-20 15:52:55,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:55,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:55,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-20 15:52:55,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2024-06-20 15:52:55,595 INFO L175 Difference]: Start difference. First operand has 162 places, 136 transitions, 1334 flow. Second operand 10 states and 122 transitions. [2024-06-20 15:52:55,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 154 transitions, 1678 flow [2024-06-20 15:52:55,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 154 transitions, 1565 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-20 15:52:55,653 INFO L231 Difference]: Finished difference. Result has 165 places, 136 transitions, 1304 flow [2024-06-20 15:52:55,653 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1304, PETRI_PLACES=165, PETRI_TRANSITIONS=136} [2024-06-20 15:52:55,654 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 136 predicate places. [2024-06-20 15:52:55,654 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 136 transitions, 1304 flow [2024-06-20 15:52:55,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:55,654 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:55,654 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:55,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-20 15:52:55,654 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:55,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:55,655 INFO L85 PathProgramCache]: Analyzing trace with hash 330318192, now seen corresponding path program 8 times [2024-06-20 15:52:55,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:55,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203848392] [2024-06-20 15:52:55,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:55,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:55,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:56,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:56,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203848392] [2024-06-20 15:52:56,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203848392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:56,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:56,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:56,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653696166] [2024-06-20 15:52:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:56,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:56,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:56,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:56,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 136 transitions, 1304 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:56,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:56,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:56,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:56,773 INFO L124 PetriNetUnfolderBase]: 367/661 cut-off events. [2024-06-20 15:52:56,773 INFO L125 PetriNetUnfolderBase]: For 33317/33317 co-relation queries the response was YES. [2024-06-20 15:52:56,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4278 conditions, 661 events. 367/661 cut-off events. For 33317/33317 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2991 event pairs, 57 based on Foata normal form. 2/661 useless extension candidates. Maximal degree in co-relation 4203. Up to 578 conditions per place. [2024-06-20 15:52:56,777 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 116 selfloop transitions, 32 changer transitions 0/150 dead transitions. [2024-06-20 15:52:56,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 150 transitions, 1632 flow [2024-06-20 15:52:56,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 114 transitions. [2024-06-20 15:52:56,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38 [2024-06-20 15:52:56,778 INFO L175 Difference]: Start difference. First operand has 165 places, 136 transitions, 1304 flow. Second operand 10 states and 114 transitions. [2024-06-20 15:52:56,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 150 transitions, 1632 flow [2024-06-20 15:52:56,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 150 transitions, 1513 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-06-20 15:52:56,839 INFO L231 Difference]: Finished difference. Result has 165 places, 136 transitions, 1253 flow [2024-06-20 15:52:56,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1185, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1253, PETRI_PLACES=165, PETRI_TRANSITIONS=136} [2024-06-20 15:52:56,840 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 136 predicate places. [2024-06-20 15:52:56,840 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 136 transitions, 1253 flow [2024-06-20 15:52:56,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:56,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:56,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:56,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-20 15:52:56,840 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:56,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:56,840 INFO L85 PathProgramCache]: Analyzing trace with hash 330318347, now seen corresponding path program 6 times [2024-06-20 15:52:56,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:56,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792659288] [2024-06-20 15:52:56,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:56,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:57,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:57,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:57,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792659288] [2024-06-20 15:52:57,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792659288] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:57,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:57,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:57,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338077145] [2024-06-20 15:52:57,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:57,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:57,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:57,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:57,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:57,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:57,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 136 transitions, 1253 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:57,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:57,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:57,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:58,254 INFO L124 PetriNetUnfolderBase]: 373/671 cut-off events. [2024-06-20 15:52:58,254 INFO L125 PetriNetUnfolderBase]: For 34649/34649 co-relation queries the response was YES. [2024-06-20 15:52:58,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4323 conditions, 671 events. 373/671 cut-off events. For 34649/34649 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3042 event pairs, 55 based on Foata normal form. 2/671 useless extension candidates. Maximal degree in co-relation 4247. Up to 405 conditions per place. [2024-06-20 15:52:58,258 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 94 selfloop transitions, 59 changer transitions 0/155 dead transitions. [2024-06-20 15:52:58,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 155 transitions, 1757 flow [2024-06-20 15:52:58,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:52:58,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:52:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-20 15:52:58,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43703703703703706 [2024-06-20 15:52:58,259 INFO L175 Difference]: Start difference. First operand has 165 places, 136 transitions, 1253 flow. Second operand 9 states and 118 transitions. [2024-06-20 15:52:58,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 155 transitions, 1757 flow [2024-06-20 15:52:58,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 155 transitions, 1647 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-20 15:52:58,333 INFO L231 Difference]: Finished difference. Result has 166 places, 138 transitions, 1352 flow [2024-06-20 15:52:58,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1143, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1352, PETRI_PLACES=166, PETRI_TRANSITIONS=138} [2024-06-20 15:52:58,334 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 137 predicate places. [2024-06-20 15:52:58,334 INFO L495 AbstractCegarLoop]: Abstraction has has 166 places, 138 transitions, 1352 flow [2024-06-20 15:52:58,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:58,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:58,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:58,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-20 15:52:58,335 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:58,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:58,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1342320152, now seen corresponding path program 9 times [2024-06-20 15:52:58,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:58,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673648327] [2024-06-20 15:52:58,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:58,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:58,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:52:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:52:59,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:52:59,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673648327] [2024-06-20 15:52:59,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673648327] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:52:59,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:52:59,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:52:59,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039167067] [2024-06-20 15:52:59,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:52:59,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:52:59,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:52:59,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:52:59,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:52:59,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:52:59,182 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 138 transitions, 1352 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:59,182 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:52:59,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:52:59,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:52:59,447 INFO L124 PetriNetUnfolderBase]: 377/679 cut-off events. [2024-06-20 15:52:59,448 INFO L125 PetriNetUnfolderBase]: For 35998/35998 co-relation queries the response was YES. [2024-06-20 15:52:59,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4515 conditions, 679 events. 377/679 cut-off events. For 35998/35998 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3096 event pairs, 55 based on Foata normal form. 2/679 useless extension candidates. Maximal degree in co-relation 4437. Up to 600 conditions per place. [2024-06-20 15:52:59,453 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 121 selfloop transitions, 31 changer transitions 0/154 dead transitions. [2024-06-20 15:52:59,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 154 transitions, 1831 flow [2024-06-20 15:52:59,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:52:59,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:52:59,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-20 15:52:59,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 15:52:59,455 INFO L175 Difference]: Start difference. First operand has 166 places, 138 transitions, 1352 flow. Second operand 10 states and 110 transitions. [2024-06-20 15:52:59,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 154 transitions, 1831 flow [2024-06-20 15:52:59,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 154 transitions, 1736 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-20 15:52:59,532 INFO L231 Difference]: Finished difference. Result has 171 places, 141 transitions, 1381 flow [2024-06-20 15:52:59,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1259, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1381, PETRI_PLACES=171, PETRI_TRANSITIONS=141} [2024-06-20 15:52:59,532 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 142 predicate places. [2024-06-20 15:52:59,532 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 141 transitions, 1381 flow [2024-06-20 15:52:59,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:52:59,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:52:59,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:52:59,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-20 15:52:59,533 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:52:59,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:52:59,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1968350425, now seen corresponding path program 7 times [2024-06-20 15:52:59,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:52:59,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451287856] [2024-06-20 15:52:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:52:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:52:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:00,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:00,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451287856] [2024-06-20 15:53:00,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451287856] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:00,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:00,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:00,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131037973] [2024-06-20 15:53:00,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:00,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:00,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:00,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:00,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 141 transitions, 1381 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:00,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:00,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:00,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:01,095 INFO L124 PetriNetUnfolderBase]: 383/689 cut-off events. [2024-06-20 15:53:01,095 INFO L125 PetriNetUnfolderBase]: For 37888/37888 co-relation queries the response was YES. [2024-06-20 15:53:01,098 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4593 conditions, 689 events. 383/689 cut-off events. For 37888/37888 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3122 event pairs, 48 based on Foata normal form. 2/689 useless extension candidates. Maximal degree in co-relation 4513. Up to 555 conditions per place. [2024-06-20 15:53:01,100 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 116 selfloop transitions, 44 changer transitions 0/162 dead transitions. [2024-06-20 15:53:01,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 162 transitions, 1909 flow [2024-06-20 15:53:01,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:53:01,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:53:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-20 15:53:01,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38055555555555554 [2024-06-20 15:53:01,102 INFO L175 Difference]: Start difference. First operand has 171 places, 141 transitions, 1381 flow. Second operand 12 states and 137 transitions. [2024-06-20 15:53:01,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 162 transitions, 1909 flow [2024-06-20 15:53:01,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 162 transitions, 1812 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:01,171 INFO L231 Difference]: Finished difference. Result has 175 places, 143 transitions, 1438 flow [2024-06-20 15:53:01,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1284, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1438, PETRI_PLACES=175, PETRI_TRANSITIONS=143} [2024-06-20 15:53:01,172 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 146 predicate places. [2024-06-20 15:53:01,172 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 143 transitions, 1438 flow [2024-06-20 15:53:01,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:01,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:01,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:01,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-20 15:53:01,172 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:01,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:01,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1164657520, now seen corresponding path program 10 times [2024-06-20 15:53:01,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:01,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973105718] [2024-06-20 15:53:01,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:01,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:01,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:01,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:01,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973105718] [2024-06-20 15:53:01,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973105718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:01,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:01,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:01,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128274463] [2024-06-20 15:53:01,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:01,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:01,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:01,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:01,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:02,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:02,017 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 143 transitions, 1438 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:02,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:02,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:02,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:02,272 INFO L124 PetriNetUnfolderBase]: 387/697 cut-off events. [2024-06-20 15:53:02,272 INFO L125 PetriNetUnfolderBase]: For 39366/39366 co-relation queries the response was YES. [2024-06-20 15:53:02,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4599 conditions, 697 events. 387/697 cut-off events. For 39366/39366 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3192 event pairs, 55 based on Foata normal form. 2/697 useless extension candidates. Maximal degree in co-relation 4520. Up to 641 conditions per place. [2024-06-20 15:53:02,276 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 123 selfloop transitions, 30 changer transitions 0/155 dead transitions. [2024-06-20 15:53:02,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 155 transitions, 1787 flow [2024-06-20 15:53:02,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:02,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 15:53:02,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-06-20 15:53:02,277 INFO L175 Difference]: Start difference. First operand has 175 places, 143 transitions, 1438 flow. Second operand 10 states and 108 transitions. [2024-06-20 15:53:02,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 155 transitions, 1787 flow [2024-06-20 15:53:02,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 155 transitions, 1628 flow, removed 31 selfloop flow, removed 10 redundant places. [2024-06-20 15:53:02,351 INFO L231 Difference]: Finished difference. Result has 175 places, 144 transitions, 1364 flow [2024-06-20 15:53:02,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1279, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1364, PETRI_PLACES=175, PETRI_TRANSITIONS=144} [2024-06-20 15:53:02,352 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 146 predicate places. [2024-06-20 15:53:02,352 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 144 transitions, 1364 flow [2024-06-20 15:53:02,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:02,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:02,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:02,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-20 15:53:02,353 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:02,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1158409103, now seen corresponding path program 2 times [2024-06-20 15:53:02,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:02,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430344547] [2024-06-20 15:53:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:02,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:02,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:03,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:03,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430344547] [2024-06-20 15:53:03,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430344547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:03,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:03,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:03,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390179213] [2024-06-20 15:53:03,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:03,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:03,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:03,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:03,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:03,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:03,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 144 transitions, 1364 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:03,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:03,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:03,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:03,645 INFO L124 PetriNetUnfolderBase]: 394/710 cut-off events. [2024-06-20 15:53:03,645 INFO L125 PetriNetUnfolderBase]: For 39749/39749 co-relation queries the response was YES. [2024-06-20 15:53:03,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4534 conditions, 710 events. 394/710 cut-off events. For 39749/39749 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3276 event pairs, 51 based on Foata normal form. 2/710 useless extension candidates. Maximal degree in co-relation 4454. Up to 672 conditions per place. [2024-06-20 15:53:03,649 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 143 selfloop transitions, 16 changer transitions 0/161 dead transitions. [2024-06-20 15:53:03,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 161 transitions, 1734 flow [2024-06-20 15:53:03,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:03,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:03,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-20 15:53:03,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 15:53:03,650 INFO L175 Difference]: Start difference. First operand has 175 places, 144 transitions, 1364 flow. Second operand 9 states and 99 transitions. [2024-06-20 15:53:03,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 161 transitions, 1734 flow [2024-06-20 15:53:03,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 161 transitions, 1658 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:03,718 INFO L231 Difference]: Finished difference. Result has 179 places, 149 transitions, 1370 flow [2024-06-20 15:53:03,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1288, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1370, PETRI_PLACES=179, PETRI_TRANSITIONS=149} [2024-06-20 15:53:03,718 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 150 predicate places. [2024-06-20 15:53:03,719 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 149 transitions, 1370 flow [2024-06-20 15:53:03,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:03,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:03,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:03,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-20 15:53:03,719 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:03,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:03,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1517957403, now seen corresponding path program 3 times [2024-06-20 15:53:03,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:03,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929608103] [2024-06-20 15:53:03,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:03,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:03,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:04,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:04,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929608103] [2024-06-20 15:53:04,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929608103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:04,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:04,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:04,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166433933] [2024-06-20 15:53:04,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:04,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:04,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:04,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:04,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:04,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:04,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 149 transitions, 1370 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:04,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:04,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:04,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:05,005 INFO L124 PetriNetUnfolderBase]: 398/718 cut-off events. [2024-06-20 15:53:05,006 INFO L125 PetriNetUnfolderBase]: For 40962/40962 co-relation queries the response was YES. [2024-06-20 15:53:05,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4620 conditions, 718 events. 398/718 cut-off events. For 40962/40962 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3327 event pairs, 53 based on Foata normal form. 2/718 useless extension candidates. Maximal degree in co-relation 4537. Up to 681 conditions per place. [2024-06-20 15:53:05,013 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 143 selfloop transitions, 16 changer transitions 0/161 dead transitions. [2024-06-20 15:53:05,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 161 transitions, 1724 flow [2024-06-20 15:53:05,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:05,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 97 transitions. [2024-06-20 15:53:05,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3592592592592593 [2024-06-20 15:53:05,014 INFO L175 Difference]: Start difference. First operand has 179 places, 149 transitions, 1370 flow. Second operand 9 states and 97 transitions. [2024-06-20 15:53:05,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 161 transitions, 1724 flow [2024-06-20 15:53:05,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 161 transitions, 1692 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-20 15:53:05,093 INFO L231 Difference]: Finished difference. Result has 183 places, 150 transitions, 1387 flow [2024-06-20 15:53:05,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1338, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1387, PETRI_PLACES=183, PETRI_TRANSITIONS=150} [2024-06-20 15:53:05,094 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 154 predicate places. [2024-06-20 15:53:05,094 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 150 transitions, 1387 flow [2024-06-20 15:53:05,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:05,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:05,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:05,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-20 15:53:05,094 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:05,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:05,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1165551007, now seen corresponding path program 8 times [2024-06-20 15:53:05,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:05,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688709746] [2024-06-20 15:53:05,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:05,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:06,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:06,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:06,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688709746] [2024-06-20 15:53:06,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688709746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:06,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:06,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:06,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446319056] [2024-06-20 15:53:06,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:06,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:06,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:06,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:06,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:06,160 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:06,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 150 transitions, 1387 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:06,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:06,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:06,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:06,499 INFO L124 PetriNetUnfolderBase]: 394/712 cut-off events. [2024-06-20 15:53:06,499 INFO L125 PetriNetUnfolderBase]: For 38933/38933 co-relation queries the response was YES. [2024-06-20 15:53:06,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4462 conditions, 712 events. 394/712 cut-off events. For 38933/38933 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3315 event pairs, 48 based on Foata normal form. 2/712 useless extension candidates. Maximal degree in co-relation 4379. Up to 665 conditions per place. [2024-06-20 15:53:06,504 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 144 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-20 15:53:06,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 165 transitions, 1807 flow [2024-06-20 15:53:06,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:06,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:06,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-20 15:53:06,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36 [2024-06-20 15:53:06,505 INFO L175 Difference]: Start difference. First operand has 183 places, 150 transitions, 1387 flow. Second operand 10 states and 108 transitions. [2024-06-20 15:53:06,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 165 transitions, 1807 flow [2024-06-20 15:53:06,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 165 transitions, 1770 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:06,584 INFO L231 Difference]: Finished difference. Result has 186 places, 152 transitions, 1457 flow [2024-06-20 15:53:06,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1457, PETRI_PLACES=186, PETRI_TRANSITIONS=152} [2024-06-20 15:53:06,584 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-06-20 15:53:06,584 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 152 transitions, 1457 flow [2024-06-20 15:53:06,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:06,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:06,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:06,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-20 15:53:06,585 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:06,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:06,585 INFO L85 PathProgramCache]: Analyzing trace with hash 958891832, now seen corresponding path program 11 times [2024-06-20 15:53:06,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:06,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420706136] [2024-06-20 15:53:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:06,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:07,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:07,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:07,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420706136] [2024-06-20 15:53:07,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420706136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:07,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:07,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:07,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920145039] [2024-06-20 15:53:07,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:07,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:07,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:07,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:07,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:07,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:07,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 152 transitions, 1457 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:07,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:07,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:07,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:07,887 INFO L124 PetriNetUnfolderBase]: 418/764 cut-off events. [2024-06-20 15:53:07,887 INFO L125 PetriNetUnfolderBase]: For 61380/61380 co-relation queries the response was YES. [2024-06-20 15:53:07,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4781 conditions, 764 events. 418/764 cut-off events. For 61380/61380 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3648 event pairs, 50 based on Foata normal form. 14/776 useless extension candidates. Maximal degree in co-relation 4697. Up to 622 conditions per place. [2024-06-20 15:53:07,895 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 133 selfloop transitions, 26 changer transitions 12/173 dead transitions. [2024-06-20 15:53:07,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 173 transitions, 1942 flow [2024-06-20 15:53:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-20 15:53:07,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-20 15:53:07,896 INFO L175 Difference]: Start difference. First operand has 186 places, 152 transitions, 1457 flow. Second operand 10 states and 120 transitions. [2024-06-20 15:53:07,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 173 transitions, 1942 flow [2024-06-20 15:53:07,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 173 transitions, 1851 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:07,990 INFO L231 Difference]: Finished difference. Result has 188 places, 148 transitions, 1404 flow [2024-06-20 15:53:07,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1366, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1404, PETRI_PLACES=188, PETRI_TRANSITIONS=148} [2024-06-20 15:53:07,990 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2024-06-20 15:53:07,991 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 148 transitions, 1404 flow [2024-06-20 15:53:07,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:07,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:07,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:07,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-20 15:53:07,991 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:07,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:07,992 INFO L85 PathProgramCache]: Analyzing trace with hash -713637631, now seen corresponding path program 9 times [2024-06-20 15:53:07,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:07,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123090917] [2024-06-20 15:53:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:07,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:08,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:08,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:08,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:08,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123090917] [2024-06-20 15:53:08,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123090917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:08,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:08,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:08,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864513430] [2024-06-20 15:53:08,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:08,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:08,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:08,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:08,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:09,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:09,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 148 transitions, 1404 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:09,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:09,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:09,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:09,365 INFO L124 PetriNetUnfolderBase]: 396/718 cut-off events. [2024-06-20 15:53:09,365 INFO L125 PetriNetUnfolderBase]: For 41624/41624 co-relation queries the response was YES. [2024-06-20 15:53:09,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4558 conditions, 718 events. 396/718 cut-off events. For 41624/41624 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 3380 event pairs, 46 based on Foata normal form. 2/718 useless extension candidates. Maximal degree in co-relation 4473. Up to 639 conditions per place. [2024-06-20 15:53:09,370 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 139 selfloop transitions, 26 changer transitions 0/167 dead transitions. [2024-06-20 15:53:09,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 167 transitions, 1844 flow [2024-06-20 15:53:09,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-20 15:53:09,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-06-20 15:53:09,371 INFO L175 Difference]: Start difference. First operand has 188 places, 148 transitions, 1404 flow. Second operand 10 states and 116 transitions. [2024-06-20 15:53:09,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 167 transitions, 1844 flow [2024-06-20 15:53:09,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 167 transitions, 1766 flow, removed 9 selfloop flow, removed 9 redundant places. [2024-06-20 15:53:09,461 INFO L231 Difference]: Finished difference. Result has 188 places, 152 transitions, 1455 flow [2024-06-20 15:53:09,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1455, PETRI_PLACES=188, PETRI_TRANSITIONS=152} [2024-06-20 15:53:09,462 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2024-06-20 15:53:09,462 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 152 transitions, 1455 flow [2024-06-20 15:53:09,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:09,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:09,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:09,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-20 15:53:09,463 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:09,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:09,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1170164050, now seen corresponding path program 12 times [2024-06-20 15:53:09,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:09,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049344220] [2024-06-20 15:53:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:09,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:10,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:10,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:10,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049344220] [2024-06-20 15:53:10,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049344220] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:10,322 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:10,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:10,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670991459] [2024-06-20 15:53:10,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:10,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:10,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:10,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:10,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:10,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:10,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 152 transitions, 1455 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:10,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:10,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:10,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:10,799 INFO L124 PetriNetUnfolderBase]: 416/764 cut-off events. [2024-06-20 15:53:10,799 INFO L125 PetriNetUnfolderBase]: For 63716/63716 co-relation queries the response was YES. [2024-06-20 15:53:10,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4668 conditions, 764 events. 416/764 cut-off events. For 63716/63716 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3673 event pairs, 49 based on Foata normal form. 16/778 useless extension candidates. Maximal degree in co-relation 4582. Up to 608 conditions per place. [2024-06-20 15:53:10,805 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 133 selfloop transitions, 21 changer transitions 17/173 dead transitions. [2024-06-20 15:53:10,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 173 transitions, 1942 flow [2024-06-20 15:53:10,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:10,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:10,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-20 15:53:10,806 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2024-06-20 15:53:10,806 INFO L175 Difference]: Start difference. First operand has 188 places, 152 transitions, 1455 flow. Second operand 10 states and 122 transitions. [2024-06-20 15:53:10,806 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 173 transitions, 1942 flow [2024-06-20 15:53:10,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 173 transitions, 1837 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:10,890 INFO L231 Difference]: Finished difference. Result has 192 places, 143 transitions, 1330 flow [2024-06-20 15:53:10,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1350, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1330, PETRI_PLACES=192, PETRI_TRANSITIONS=143} [2024-06-20 15:53:10,890 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 163 predicate places. [2024-06-20 15:53:10,890 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 143 transitions, 1330 flow [2024-06-20 15:53:10,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:10,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:10,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:10,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-20 15:53:10,891 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:10,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:10,892 INFO L85 PathProgramCache]: Analyzing trace with hash 964254367, now seen corresponding path program 10 times [2024-06-20 15:53:10,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:10,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520709234] [2024-06-20 15:53:10,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:10,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:11,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:11,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520709234] [2024-06-20 15:53:11,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520709234] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:11,754 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:11,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:11,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227379362] [2024-06-20 15:53:11,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:11,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:11,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:11,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:11,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:11,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:11,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 143 transitions, 1330 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:11,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:11,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:11,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:12,151 INFO L124 PetriNetUnfolderBase]: 372/684 cut-off events. [2024-06-20 15:53:12,152 INFO L125 PetriNetUnfolderBase]: For 41635/41635 co-relation queries the response was YES. [2024-06-20 15:53:12,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4232 conditions, 684 events. 372/684 cut-off events. For 41635/41635 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3211 event pairs, 45 based on Foata normal form. 2/684 useless extension candidates. Maximal degree in co-relation 4144. Up to 618 conditions per place. [2024-06-20 15:53:12,158 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 134 selfloop transitions, 22 changer transitions 0/158 dead transitions. [2024-06-20 15:53:12,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 158 transitions, 1728 flow [2024-06-20 15:53:12,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:12,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-20 15:53:12,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2024-06-20 15:53:12,159 INFO L175 Difference]: Start difference. First operand has 192 places, 143 transitions, 1330 flow. Second operand 10 states and 112 transitions. [2024-06-20 15:53:12,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 158 transitions, 1728 flow [2024-06-20 15:53:12,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 158 transitions, 1642 flow, removed 12 selfloop flow, removed 13 redundant places. [2024-06-20 15:53:12,235 INFO L231 Difference]: Finished difference. Result has 187 places, 145 transitions, 1349 flow [2024-06-20 15:53:12,235 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1349, PETRI_PLACES=187, PETRI_TRANSITIONS=145} [2024-06-20 15:53:12,235 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 158 predicate places. [2024-06-20 15:53:12,235 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 145 transitions, 1349 flow [2024-06-20 15:53:12,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:12,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:12,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:12,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-20 15:53:12,236 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:12,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:12,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1259160791, now seen corresponding path program 4 times [2024-06-20 15:53:12,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:12,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797981409] [2024-06-20 15:53:12,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:12,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:12,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:13,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:13,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797981409] [2024-06-20 15:53:13,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797981409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:13,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:13,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-20 15:53:13,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467446733] [2024-06-20 15:53:13,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:13,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-20 15:53:13,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:13,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-20 15:53:13,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-20 15:53:13,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:13,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 145 transitions, 1349 flow. Second operand has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:13,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:13,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:13,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:13,390 INFO L124 PetriNetUnfolderBase]: 376/692 cut-off events. [2024-06-20 15:53:13,390 INFO L125 PetriNetUnfolderBase]: For 40292/40292 co-relation queries the response was YES. [2024-06-20 15:53:13,394 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4205 conditions, 692 events. 376/692 cut-off events. For 40292/40292 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3263 event pairs, 49 based on Foata normal form. 2/692 useless extension candidates. Maximal degree in co-relation 4119. Up to 651 conditions per place. [2024-06-20 15:53:13,396 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 140 selfloop transitions, 16 changer transitions 0/158 dead transitions. [2024-06-20 15:53:13,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 158 transitions, 1703 flow [2024-06-20 15:53:13,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:13,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:13,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 99 transitions. [2024-06-20 15:53:13,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 15:53:13,398 INFO L175 Difference]: Start difference. First operand has 187 places, 145 transitions, 1349 flow. Second operand 9 states and 99 transitions. [2024-06-20 15:53:13,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 158 transitions, 1703 flow [2024-06-20 15:53:13,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 158 transitions, 1618 flow, removed 22 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:13,479 INFO L231 Difference]: Finished difference. Result has 188 places, 146 transitions, 1314 flow [2024-06-20 15:53:13,479 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1264, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1314, PETRI_PLACES=188, PETRI_TRANSITIONS=146} [2024-06-20 15:53:13,480 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2024-06-20 15:53:13,480 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 146 transitions, 1314 flow [2024-06-20 15:53:13,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.4) internal successors, (74), 10 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:13,480 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:13,480 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:13,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-20 15:53:13,481 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:13,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:13,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1972403117, now seen corresponding path program 5 times [2024-06-20 15:53:13,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:13,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049372173] [2024-06-20 15:53:13,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:13,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:13,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:14,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:14,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:14,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049372173] [2024-06-20 15:53:14,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049372173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:14,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:14,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:14,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680206711] [2024-06-20 15:53:14,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:14,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:14,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:14,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:14,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:14,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:14,388 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 146 transitions, 1314 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:14,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:14,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:14,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:14,702 INFO L124 PetriNetUnfolderBase]: 373/687 cut-off events. [2024-06-20 15:53:14,703 INFO L125 PetriNetUnfolderBase]: For 37075/37075 co-relation queries the response was YES. [2024-06-20 15:53:14,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4006 conditions, 687 events. 373/687 cut-off events. For 37075/37075 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 3232 event pairs, 46 based on Foata normal form. 2/687 useless extension candidates. Maximal degree in co-relation 3919. Up to 653 conditions per place. [2024-06-20 15:53:14,707 INFO L140 encePairwiseOnDemand]: 21/30 looper letters, 142 selfloop transitions, 13 changer transitions 0/157 dead transitions. [2024-06-20 15:53:14,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 157 transitions, 1648 flow [2024-06-20 15:53:14,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-20 15:53:14,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-20 15:53:14,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 95 transitions. [2024-06-20 15:53:14,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35185185185185186 [2024-06-20 15:53:14,708 INFO L175 Difference]: Start difference. First operand has 188 places, 146 transitions, 1314 flow. Second operand 9 states and 95 transitions. [2024-06-20 15:53:14,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 157 transitions, 1648 flow [2024-06-20 15:53:14,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 157 transitions, 1605 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:14,785 INFO L231 Difference]: Finished difference. Result has 190 places, 146 transitions, 1301 flow [2024-06-20 15:53:14,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1271, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1301, PETRI_PLACES=190, PETRI_TRANSITIONS=146} [2024-06-20 15:53:14,786 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 161 predicate places. [2024-06-20 15:53:14,786 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 146 transitions, 1301 flow [2024-06-20 15:53:14,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:14,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:14,786 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:14,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-20 15:53:14,786 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:14,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash 2056324988, now seen corresponding path program 13 times [2024-06-20 15:53:14,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:14,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583232114] [2024-06-20 15:53:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:14,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:15,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:15,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583232114] [2024-06-20 15:53:15,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583232114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:15,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:15,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:15,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667499104] [2024-06-20 15:53:15,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:15,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:15,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:15,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:15,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:15,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:15,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 146 transitions, 1301 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:15,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:15,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:15,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:16,011 INFO L124 PetriNetUnfolderBase]: 390/726 cut-off events. [2024-06-20 15:53:16,012 INFO L125 PetriNetUnfolderBase]: For 58568/58568 co-relation queries the response was YES. [2024-06-20 15:53:16,016 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4073 conditions, 726 events. 390/726 cut-off events. For 58568/58568 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3449 event pairs, 45 based on Foata normal form. 14/738 useless extension candidates. Maximal degree in co-relation 3985. Up to 621 conditions per place. [2024-06-20 15:53:16,018 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 136 selfloop transitions, 14 changer transitions 13/165 dead transitions. [2024-06-20 15:53:16,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 165 transitions, 1745 flow [2024-06-20 15:53:16,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:16,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:16,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2024-06-20 15:53:16,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-06-20 15:53:16,019 INFO L175 Difference]: Start difference. First operand has 190 places, 146 transitions, 1301 flow. Second operand 10 states and 115 transitions. [2024-06-20 15:53:16,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 165 transitions, 1745 flow [2024-06-20 15:53:16,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 165 transitions, 1672 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:16,108 INFO L231 Difference]: Finished difference. Result has 192 places, 140 transitions, 1211 flow [2024-06-20 15:53:16,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1228, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1211, PETRI_PLACES=192, PETRI_TRANSITIONS=140} [2024-06-20 15:53:16,109 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 163 predicate places. [2024-06-20 15:53:16,109 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 140 transitions, 1211 flow [2024-06-20 15:53:16,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:16,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:16,109 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:16,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-20 15:53:16,109 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:16,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:16,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1510592237, now seen corresponding path program 11 times [2024-06-20 15:53:16,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:16,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039514781] [2024-06-20 15:53:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:16,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:16,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:16,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039514781] [2024-06-20 15:53:16,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039514781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:16,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:16,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-20 15:53:16,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203362878] [2024-06-20 15:53:16,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:16,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-20 15:53:16,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:16,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-20 15:53:16,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-20 15:53:16,953 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:16,953 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 140 transitions, 1211 flow. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:16,953 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:16,953 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:16,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:17,285 INFO L124 PetriNetUnfolderBase]: 348/650 cut-off events. [2024-06-20 15:53:17,285 INFO L125 PetriNetUnfolderBase]: For 30518/30518 co-relation queries the response was YES. [2024-06-20 15:53:17,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3475 conditions, 650 events. 348/650 cut-off events. For 30518/30518 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3059 event pairs, 40 based on Foata normal form. 2/650 useless extension candidates. Maximal degree in co-relation 3386. Up to 582 conditions per place. [2024-06-20 15:53:17,289 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 127 selfloop transitions, 25 changer transitions 0/154 dead transitions. [2024-06-20 15:53:17,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 154 transitions, 1553 flow [2024-06-20 15:53:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-20 15:53:17,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2024-06-20 15:53:17,290 INFO L175 Difference]: Start difference. First operand has 192 places, 140 transitions, 1211 flow. Second operand 10 states and 112 transitions. [2024-06-20 15:53:17,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 154 transitions, 1553 flow [2024-06-20 15:53:17,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 154 transitions, 1419 flow, removed 21 selfloop flow, removed 14 redundant places. [2024-06-20 15:53:17,354 INFO L231 Difference]: Finished difference. Result has 188 places, 140 transitions, 1132 flow [2024-06-20 15:53:17,355 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1132, PETRI_PLACES=188, PETRI_TRANSITIONS=140} [2024-06-20 15:53:17,355 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2024-06-20 15:53:17,355 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 140 transitions, 1132 flow [2024-06-20 15:53:17,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:17,355 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:17,355 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:17,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-20 15:53:17,355 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:17,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:17,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1268906491, now seen corresponding path program 1 times [2024-06-20 15:53:17,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:17,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252617356] [2024-06-20 15:53:17,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:17,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:18,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:18,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252617356] [2024-06-20 15:53:18,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252617356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:18,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:18,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:18,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771561918] [2024-06-20 15:53:18,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:18,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:18,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:18,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:18,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:18,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:18,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 140 transitions, 1132 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:18,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:18,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:18,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:19,265 INFO L124 PetriNetUnfolderBase]: 460/874 cut-off events. [2024-06-20 15:53:19,265 INFO L125 PetriNetUnfolderBase]: For 63229/63229 co-relation queries the response was YES. [2024-06-20 15:53:19,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4857 conditions, 874 events. 460/874 cut-off events. For 63229/63229 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4497 event pairs, 99 based on Foata normal form. 8/880 useless extension candidates. Maximal degree in co-relation 4770. Up to 641 conditions per place. [2024-06-20 15:53:19,271 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 163 selfloop transitions, 18 changer transitions 14/197 dead transitions. [2024-06-20 15:53:19,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 197 transitions, 1985 flow [2024-06-20 15:53:19,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:53:19,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:53:19,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-06-20 15:53:19,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37435897435897436 [2024-06-20 15:53:19,272 INFO L175 Difference]: Start difference. First operand has 188 places, 140 transitions, 1132 flow. Second operand 13 states and 146 transitions. [2024-06-20 15:53:19,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 197 transitions, 1985 flow [2024-06-20 15:53:19,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 197 transitions, 1909 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-20 15:53:19,411 INFO L231 Difference]: Finished difference. Result has 200 places, 154 transitions, 1250 flow [2024-06-20 15:53:19,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1058, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1250, PETRI_PLACES=200, PETRI_TRANSITIONS=154} [2024-06-20 15:53:19,412 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 171 predicate places. [2024-06-20 15:53:19,412 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 154 transitions, 1250 flow [2024-06-20 15:53:19,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:19,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:19,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:19,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-20 15:53:19,412 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:19,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:19,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1326998941, now seen corresponding path program 2 times [2024-06-20 15:53:19,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:19,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875927554] [2024-06-20 15:53:19,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:19,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:19,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:20,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:20,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875927554] [2024-06-20 15:53:20,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1875927554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:20,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:20,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:20,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285700413] [2024-06-20 15:53:20,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:20,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:20,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:20,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:20,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:20,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:20,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 154 transitions, 1250 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:20,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:20,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:20,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:21,274 INFO L124 PetriNetUnfolderBase]: 444/844 cut-off events. [2024-06-20 15:53:21,274 INFO L125 PetriNetUnfolderBase]: For 65197/65197 co-relation queries the response was YES. [2024-06-20 15:53:21,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4833 conditions, 844 events. 444/844 cut-off events. For 65197/65197 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4308 event pairs, 89 based on Foata normal form. 8/850 useless extension candidates. Maximal degree in co-relation 4737. Up to 641 conditions per place. [2024-06-20 15:53:21,282 INFO L140 encePairwiseOnDemand]: 18/30 looper letters, 159 selfloop transitions, 17 changer transitions 13/191 dead transitions. [2024-06-20 15:53:21,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 191 transitions, 1971 flow [2024-06-20 15:53:21,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:53:21,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:53:21,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 142 transitions. [2024-06-20 15:53:21,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3641025641025641 [2024-06-20 15:53:21,284 INFO L175 Difference]: Start difference. First operand has 200 places, 154 transitions, 1250 flow. Second operand 13 states and 142 transitions. [2024-06-20 15:53:21,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 191 transitions, 1971 flow [2024-06-20 15:53:21,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 191 transitions, 1945 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:21,405 INFO L231 Difference]: Finished difference. Result has 206 places, 153 transitions, 1263 flow [2024-06-20 15:53:21,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1263, PETRI_PLACES=206, PETRI_TRANSITIONS=153} [2024-06-20 15:53:21,406 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 177 predicate places. [2024-06-20 15:53:21,406 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 153 transitions, 1263 flow [2024-06-20 15:53:21,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:21,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:21,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:21,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-20 15:53:21,406 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:21,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:21,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1873261463, now seen corresponding path program 3 times [2024-06-20 15:53:21,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:21,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941544235] [2024-06-20 15:53:21,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:21,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:22,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:22,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941544235] [2024-06-20 15:53:22,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941544235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:22,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:22,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:22,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333657247] [2024-06-20 15:53:22,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:22,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:22,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:22,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:22,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:22,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:22,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 153 transitions, 1263 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:22,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:22,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:22,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:23,008 INFO L124 PetriNetUnfolderBase]: 456/870 cut-off events. [2024-06-20 15:53:23,008 INFO L125 PetriNetUnfolderBase]: For 91642/91646 co-relation queries the response was YES. [2024-06-20 15:53:23,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5103 conditions, 870 events. 456/870 cut-off events. For 91642/91646 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4453 event pairs, 67 based on Foata normal form. 22/890 useless extension candidates. Maximal degree in co-relation 5007. Up to 674 conditions per place. [2024-06-20 15:53:23,014 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 139 selfloop transitions, 31 changer transitions 13/185 dead transitions. [2024-06-20 15:53:23,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 185 transitions, 1798 flow [2024-06-20 15:53:23,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:53:23,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:53:23,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-20 15:53:23,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861111111111111 [2024-06-20 15:53:23,015 INFO L175 Difference]: Start difference. First operand has 206 places, 153 transitions, 1263 flow. Second operand 12 states and 139 transitions. [2024-06-20 15:53:23,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 185 transitions, 1798 flow [2024-06-20 15:53:23,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 185 transitions, 1752 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:53:23,128 INFO L231 Difference]: Finished difference. Result has 206 places, 153 transitions, 1289 flow [2024-06-20 15:53:23,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1221, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1289, PETRI_PLACES=206, PETRI_TRANSITIONS=153} [2024-06-20 15:53:23,128 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 177 predicate places. [2024-06-20 15:53:23,128 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 153 transitions, 1289 flow [2024-06-20 15:53:23,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:23,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:23,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:23,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-20 15:53:23,129 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:23,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:23,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1327114261, now seen corresponding path program 4 times [2024-06-20 15:53:23,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:23,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876488112] [2024-06-20 15:53:23,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:23,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:24,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:24,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:24,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876488112] [2024-06-20 15:53:24,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876488112] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:24,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:24,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:24,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649616832] [2024-06-20 15:53:24,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:24,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:24,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:24,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:24,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:24,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:24,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 153 transitions, 1289 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:24,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:24,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:24,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:24,684 INFO L124 PetriNetUnfolderBase]: 432/830 cut-off events. [2024-06-20 15:53:24,684 INFO L125 PetriNetUnfolderBase]: For 81759/81763 co-relation queries the response was YES. [2024-06-20 15:53:24,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4894 conditions, 830 events. 432/830 cut-off events. For 81759/81763 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4237 event pairs, 59 based on Foata normal form. 18/846 useless extension candidates. Maximal degree in co-relation 4799. Up to 654 conditions per place. [2024-06-20 15:53:24,690 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 137 selfloop transitions, 26 changer transitions 14/179 dead transitions. [2024-06-20 15:53:24,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 179 transitions, 1739 flow [2024-06-20 15:53:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:53:24,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:53:24,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-20 15:53:24,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2024-06-20 15:53:24,691 INFO L175 Difference]: Start difference. First operand has 206 places, 153 transitions, 1289 flow. Second operand 12 states and 136 transitions. [2024-06-20 15:53:24,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 179 transitions, 1739 flow [2024-06-20 15:53:24,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 179 transitions, 1677 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-20 15:53:24,805 INFO L231 Difference]: Finished difference. Result has 207 places, 147 transitions, 1221 flow [2024-06-20 15:53:24,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1227, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1221, PETRI_PLACES=207, PETRI_TRANSITIONS=147} [2024-06-20 15:53:24,805 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2024-06-20 15:53:24,806 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 147 transitions, 1221 flow [2024-06-20 15:53:24,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:24,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:24,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:24,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-20 15:53:24,806 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:24,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:24,807 INFO L85 PathProgramCache]: Analyzing trace with hash -275938275, now seen corresponding path program 5 times [2024-06-20 15:53:24,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:24,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716344673] [2024-06-20 15:53:24,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:24,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:24,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:25,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:25,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:25,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716344673] [2024-06-20 15:53:25,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716344673] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:25,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:25,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:25,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160209593] [2024-06-20 15:53:25,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:25,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:25,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:25,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:25,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:25,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:25,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 147 transitions, 1221 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:25,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:25,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:25,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:26,279 INFO L124 PetriNetUnfolderBase]: 499/960 cut-off events. [2024-06-20 15:53:26,280 INFO L125 PetriNetUnfolderBase]: For 125440/125444 co-relation queries the response was YES. [2024-06-20 15:53:26,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6840 conditions, 960 events. 499/960 cut-off events. For 125440/125444 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 5047 event pairs, 85 based on Foata normal form. 18/976 useless extension candidates. Maximal degree in co-relation 6745. Up to 690 conditions per place. [2024-06-20 15:53:26,287 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 151 selfloop transitions, 21 changer transitions 8/182 dead transitions. [2024-06-20 15:53:26,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 182 transitions, 1941 flow [2024-06-20 15:53:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:26,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:26,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-20 15:53:26,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38484848484848483 [2024-06-20 15:53:26,289 INFO L175 Difference]: Start difference. First operand has 207 places, 147 transitions, 1221 flow. Second operand 11 states and 127 transitions. [2024-06-20 15:53:26,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 182 transitions, 1941 flow [2024-06-20 15:53:26,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 182 transitions, 1867 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:53:26,464 INFO L231 Difference]: Finished difference. Result has 205 places, 151 transitions, 1257 flow [2024-06-20 15:53:26,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1161, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1257, PETRI_PLACES=205, PETRI_TRANSITIONS=151} [2024-06-20 15:53:26,464 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 176 predicate places. [2024-06-20 15:53:26,464 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 151 transitions, 1257 flow [2024-06-20 15:53:26,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:26,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:26,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:26,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-20 15:53:26,465 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:26,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:26,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1936930333, now seen corresponding path program 6 times [2024-06-20 15:53:26,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:26,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187694328] [2024-06-20 15:53:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:26,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:27,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:27,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:27,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187694328] [2024-06-20 15:53:27,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187694328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:27,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:27,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:27,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357800073] [2024-06-20 15:53:27,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:27,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:27,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:27,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:27,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:27,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:27,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 151 transitions, 1257 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:27,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:27,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:27,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:28,020 INFO L124 PetriNetUnfolderBase]: 437/838 cut-off events. [2024-06-20 15:53:28,020 INFO L125 PetriNetUnfolderBase]: For 91635/91639 co-relation queries the response was YES. [2024-06-20 15:53:28,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5017 conditions, 838 events. 437/838 cut-off events. For 91635/91639 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 4281 event pairs, 67 based on Foata normal form. 22/858 useless extension candidates. Maximal degree in co-relation 4921. Up to 690 conditions per place. [2024-06-20 15:53:28,029 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 140 selfloop transitions, 14 changer transitions 18/174 dead transitions. [2024-06-20 15:53:28,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 174 transitions, 1724 flow [2024-06-20 15:53:28,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:28,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:28,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-20 15:53:28,030 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 15:53:28,031 INFO L175 Difference]: Start difference. First operand has 205 places, 151 transitions, 1257 flow. Second operand 11 states and 121 transitions. [2024-06-20 15:53:28,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 174 transitions, 1724 flow [2024-06-20 15:53:28,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 174 transitions, 1684 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:53:28,154 INFO L231 Difference]: Finished difference. Result has 207 places, 144 transitions, 1174 flow [2024-06-20 15:53:28,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1217, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1174, PETRI_PLACES=207, PETRI_TRANSITIONS=144} [2024-06-20 15:53:28,155 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 178 predicate places. [2024-06-20 15:53:28,155 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 144 transitions, 1174 flow [2024-06-20 15:53:28,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:28,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:28,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:28,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-20 15:53:28,156 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:28,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:28,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1984079333, now seen corresponding path program 7 times [2024-06-20 15:53:28,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:28,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193663093] [2024-06-20 15:53:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:28,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:29,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:29,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:29,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193663093] [2024-06-20 15:53:29,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193663093] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:29,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:29,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:29,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045363273] [2024-06-20 15:53:29,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:29,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:29,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:29,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:29,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:29,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:29,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 144 transitions, 1174 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:29,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:29,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:29,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:29,696 INFO L124 PetriNetUnfolderBase]: 438/845 cut-off events. [2024-06-20 15:53:29,696 INFO L125 PetriNetUnfolderBase]: For 103681/103685 co-relation queries the response was YES. [2024-06-20 15:53:29,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5621 conditions, 845 events. 438/845 cut-off events. For 103681/103685 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 4284 event pairs, 66 based on Foata normal form. 18/861 useless extension candidates. Maximal degree in co-relation 5525. Up to 575 conditions per place. [2024-06-20 15:53:29,702 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 141 selfloop transitions, 20 changer transitions 8/171 dead transitions. [2024-06-20 15:53:29,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 171 transitions, 1798 flow [2024-06-20 15:53:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:29,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:29,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-20 15:53:29,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38484848484848483 [2024-06-20 15:53:29,703 INFO L175 Difference]: Start difference. First operand has 207 places, 144 transitions, 1174 flow. Second operand 11 states and 127 transitions. [2024-06-20 15:53:29,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 171 transitions, 1798 flow [2024-06-20 15:53:29,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 171 transitions, 1740 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-20 15:53:29,838 INFO L231 Difference]: Finished difference. Result has 201 places, 141 transitions, 1139 flow [2024-06-20 15:53:29,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1124, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=144, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1139, PETRI_PLACES=201, PETRI_TRANSITIONS=141} [2024-06-20 15:53:29,838 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 172 predicate places. [2024-06-20 15:53:29,838 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 141 transitions, 1139 flow [2024-06-20 15:53:29,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:29,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:29,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:29,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-20 15:53:29,839 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:29,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:29,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1941398983, now seen corresponding path program 8 times [2024-06-20 15:53:29,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:29,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174885600] [2024-06-20 15:53:29,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:29,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:30,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:30,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:30,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174885600] [2024-06-20 15:53:30,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174885600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:30,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:30,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:30,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11815057] [2024-06-20 15:53:30,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:30,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:30,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:30,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:30,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:30,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:30,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 141 transitions, 1139 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:30,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:30,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:30,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:31,296 INFO L124 PetriNetUnfolderBase]: 376/723 cut-off events. [2024-06-20 15:53:31,296 INFO L125 PetriNetUnfolderBase]: For 67916/67920 co-relation queries the response was YES. [2024-06-20 15:53:31,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3760 conditions, 723 events. 376/723 cut-off events. For 67916/67920 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3553 event pairs, 48 based on Foata normal form. 22/743 useless extension candidates. Maximal degree in co-relation 3667. Up to 575 conditions per place. [2024-06-20 15:53:31,303 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 131 selfloop transitions, 12 changer transitions 18/163 dead transitions. [2024-06-20 15:53:31,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 163 transitions, 1575 flow [2024-06-20 15:53:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:31,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:31,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-20 15:53:31,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 15:53:31,304 INFO L175 Difference]: Start difference. First operand has 201 places, 141 transitions, 1139 flow. Second operand 11 states and 121 transitions. [2024-06-20 15:53:31,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 163 transitions, 1575 flow [2024-06-20 15:53:31,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 163 transitions, 1521 flow, removed 3 selfloop flow, removed 13 redundant places. [2024-06-20 15:53:31,380 INFO L231 Difference]: Finished difference. Result has 197 places, 132 transitions, 1038 flow [2024-06-20 15:53:31,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1085, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1038, PETRI_PLACES=197, PETRI_TRANSITIONS=132} [2024-06-20 15:53:31,380 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 168 predicate places. [2024-06-20 15:53:31,381 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 132 transitions, 1038 flow [2024-06-20 15:53:31,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:31,381 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:31,381 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:31,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-20 15:53:31,381 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:31,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:31,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1650115341, now seen corresponding path program 1 times [2024-06-20 15:53:31,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:31,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149300188] [2024-06-20 15:53:31,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:31,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:32,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:32,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149300188] [2024-06-20 15:53:32,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149300188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:32,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:32,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:32,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863756936] [2024-06-20 15:53:32,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:32,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:32,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:32,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:32,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:32,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:32,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 132 transitions, 1038 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:32,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:32,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:32,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:33,048 INFO L124 PetriNetUnfolderBase]: 329/624 cut-off events. [2024-06-20 15:53:33,048 INFO L125 PetriNetUnfolderBase]: For 29087/29087 co-relation queries the response was YES. [2024-06-20 15:53:33,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 624 events. 329/624 cut-off events. For 29087/29087 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 2953 event pairs, 36 based on Foata normal form. 2/624 useless extension candidates. Maximal degree in co-relation 3118. Up to 492 conditions per place. [2024-06-20 15:53:33,052 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 114 selfloop transitions, 36 changer transitions 0/152 dead transitions. [2024-06-20 15:53:33,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 152 transitions, 1406 flow [2024-06-20 15:53:33,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:33,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:33,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-20 15:53:33,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4066666666666667 [2024-06-20 15:53:33,053 INFO L175 Difference]: Start difference. First operand has 197 places, 132 transitions, 1038 flow. Second operand 10 states and 122 transitions. [2024-06-20 15:53:33,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 152 transitions, 1406 flow [2024-06-20 15:53:33,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 152 transitions, 1360 flow, removed 11 selfloop flow, removed 13 redundant places. [2024-06-20 15:53:33,111 INFO L231 Difference]: Finished difference. Result has 184 places, 135 transitions, 1112 flow [2024-06-20 15:53:33,111 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=992, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1112, PETRI_PLACES=184, PETRI_TRANSITIONS=135} [2024-06-20 15:53:33,112 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2024-06-20 15:53:33,112 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 135 transitions, 1112 flow [2024-06-20 15:53:33,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:33,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:33,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:33,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-20 15:53:33,113 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:33,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1650108397, now seen corresponding path program 9 times [2024-06-20 15:53:33,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:33,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561881179] [2024-06-20 15:53:33,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:33,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:34,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:34,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:34,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561881179] [2024-06-20 15:53:34,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561881179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:34,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:34,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:34,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112513672] [2024-06-20 15:53:34,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:34,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:34,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:34,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:34,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:34,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:34,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 135 transitions, 1112 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:34,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:34,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:34,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:34,870 INFO L124 PetriNetUnfolderBase]: 345/660 cut-off events. [2024-06-20 15:53:34,871 INFO L125 PetriNetUnfolderBase]: For 41975/41975 co-relation queries the response was YES. [2024-06-20 15:53:34,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3418 conditions, 660 events. 345/660 cut-off events. For 41975/41975 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3196 event pairs, 47 based on Foata normal form. 10/668 useless extension candidates. Maximal degree in co-relation 3331. Up to 501 conditions per place. [2024-06-20 15:53:34,875 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 115 selfloop transitions, 30 changer transitions 11/158 dead transitions. [2024-06-20 15:53:34,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 158 transitions, 1536 flow [2024-06-20 15:53:34,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:34,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:34,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-20 15:53:34,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40606060606060607 [2024-06-20 15:53:34,878 INFO L175 Difference]: Start difference. First operand has 184 places, 135 transitions, 1112 flow. Second operand 11 states and 134 transitions. [2024-06-20 15:53:34,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 158 transitions, 1536 flow [2024-06-20 15:53:34,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 158 transitions, 1476 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-20 15:53:34,946 INFO L231 Difference]: Finished difference. Result has 188 places, 132 transitions, 1090 flow [2024-06-20 15:53:34,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1052, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1090, PETRI_PLACES=188, PETRI_TRANSITIONS=132} [2024-06-20 15:53:34,947 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 159 predicate places. [2024-06-20 15:53:34,947 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 132 transitions, 1090 flow [2024-06-20 15:53:34,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:34,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:34,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:34,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-20 15:53:34,948 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:34,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:34,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1649935417, now seen corresponding path program 10 times [2024-06-20 15:53:34,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:34,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201870963] [2024-06-20 15:53:34,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:34,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:34,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:35,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:35,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:35,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201870963] [2024-06-20 15:53:35,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201870963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:35,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:35,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:35,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412123276] [2024-06-20 15:53:35,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:35,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:35,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:35,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:35,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:36,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:36,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 132 transitions, 1090 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:36,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:36,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:36,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:36,379 INFO L124 PetriNetUnfolderBase]: 335/646 cut-off events. [2024-06-20 15:53:36,379 INFO L125 PetriNetUnfolderBase]: For 44194/44194 co-relation queries the response was YES. [2024-06-20 15:53:36,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3342 conditions, 646 events. 335/646 cut-off events. For 44194/44194 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3099 event pairs, 47 based on Foata normal form. 10/654 useless extension candidates. Maximal degree in co-relation 3254. Up to 452 conditions per place. [2024-06-20 15:53:36,384 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 102 selfloop transitions, 40 changer transitions 11/155 dead transitions. [2024-06-20 15:53:36,384 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 155 transitions, 1508 flow [2024-06-20 15:53:36,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:36,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:36,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 137 transitions. [2024-06-20 15:53:36,385 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41515151515151516 [2024-06-20 15:53:36,385 INFO L175 Difference]: Start difference. First operand has 188 places, 132 transitions, 1090 flow. Second operand 11 states and 137 transitions. [2024-06-20 15:53:36,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 155 transitions, 1508 flow [2024-06-20 15:53:36,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 155 transitions, 1444 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:53:36,451 INFO L231 Difference]: Finished difference. Result has 186 places, 129 transitions, 1085 flow [2024-06-20 15:53:36,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1085, PETRI_PLACES=186, PETRI_TRANSITIONS=129} [2024-06-20 15:53:36,451 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 157 predicate places. [2024-06-20 15:53:36,452 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 129 transitions, 1085 flow [2024-06-20 15:53:36,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:36,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:36,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:36,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-20 15:53:36,452 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:36,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:36,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1479228337, now seen corresponding path program 11 times [2024-06-20 15:53:36,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:36,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115861058] [2024-06-20 15:53:36,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:36,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:37,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:37,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:37,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115861058] [2024-06-20 15:53:37,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115861058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:37,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:37,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:37,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793139388] [2024-06-20 15:53:37,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:37,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:37,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:37,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:37,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:37,521 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:37,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 129 transitions, 1085 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:37,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:37,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:37,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:37,856 INFO L124 PetriNetUnfolderBase]: 352/685 cut-off events. [2024-06-20 15:53:37,856 INFO L125 PetriNetUnfolderBase]: For 57849/57849 co-relation queries the response was YES. [2024-06-20 15:53:37,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4119 conditions, 685 events. 352/685 cut-off events. For 57849/57849 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3367 event pairs, 50 based on Foata normal form. 8/691 useless extension candidates. Maximal degree in co-relation 4032. Up to 415 conditions per place. [2024-06-20 15:53:37,860 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 102 selfloop transitions, 46 changer transitions 7/157 dead transitions. [2024-06-20 15:53:37,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 157 transitions, 1663 flow [2024-06-20 15:53:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:37,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:37,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-20 15:53:37,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43636363636363634 [2024-06-20 15:53:37,862 INFO L175 Difference]: Start difference. First operand has 186 places, 129 transitions, 1085 flow. Second operand 11 states and 144 transitions. [2024-06-20 15:53:37,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 157 transitions, 1663 flow [2024-06-20 15:53:37,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 157 transitions, 1542 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-20 15:53:37,952 INFO L231 Difference]: Finished difference. Result has 182 places, 127 transitions, 1047 flow [2024-06-20 15:53:37,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=968, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1047, PETRI_PLACES=182, PETRI_TRANSITIONS=127} [2024-06-20 15:53:37,952 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 153 predicate places. [2024-06-20 15:53:37,952 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 127 transitions, 1047 flow [2024-06-20 15:53:37,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:37,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:37,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:37,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-20 15:53:37,953 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:37,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:37,953 INFO L85 PathProgramCache]: Analyzing trace with hash 1656602091, now seen corresponding path program 2 times [2024-06-20 15:53:37,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:37,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613687018] [2024-06-20 15:53:37,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:37,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:37,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:39,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:39,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:39,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613687018] [2024-06-20 15:53:39,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613687018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:39,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:39,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:39,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773515496] [2024-06-20 15:53:39,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:39,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:39,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:39,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:39,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:39,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:39,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 127 transitions, 1047 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:39,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:39,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:39,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:39,527 INFO L124 PetriNetUnfolderBase]: 338/655 cut-off events. [2024-06-20 15:53:39,527 INFO L125 PetriNetUnfolderBase]: For 45063/45063 co-relation queries the response was YES. [2024-06-20 15:53:39,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3954 conditions, 655 events. 338/655 cut-off events. For 45063/45063 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3161 event pairs, 64 based on Foata normal form. 2/655 useless extension candidates. Maximal degree in co-relation 3869. Up to 540 conditions per place. [2024-06-20 15:53:39,531 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 111 selfloop transitions, 31 changer transitions 0/144 dead transitions. [2024-06-20 15:53:39,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 144 transitions, 1387 flow [2024-06-20 15:53:39,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-20 15:53:39,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3933333333333333 [2024-06-20 15:53:39,532 INFO L175 Difference]: Start difference. First operand has 182 places, 127 transitions, 1047 flow. Second operand 10 states and 118 transitions. [2024-06-20 15:53:39,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 144 transitions, 1387 flow [2024-06-20 15:53:39,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 144 transitions, 1290 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:53:39,614 INFO L231 Difference]: Finished difference. Result has 181 places, 128 transitions, 1030 flow [2024-06-20 15:53:39,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=950, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1030, PETRI_PLACES=181, PETRI_TRANSITIONS=128} [2024-06-20 15:53:39,615 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2024-06-20 15:53:39,615 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 128 transitions, 1030 flow [2024-06-20 15:53:39,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:39,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:39,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:39,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-20 15:53:39,615 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:39,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:39,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1649930767, now seen corresponding path program 12 times [2024-06-20 15:53:39,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:39,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47153855] [2024-06-20 15:53:39,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:39,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:40,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:40,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:40,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47153855] [2024-06-20 15:53:40,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47153855] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:40,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:40,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:40,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899119048] [2024-06-20 15:53:40,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:40,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:40,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:40,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:40,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:40,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:40,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 128 transitions, 1030 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:40,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:40,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:40,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:41,146 INFO L124 PetriNetUnfolderBase]: 379/742 cut-off events. [2024-06-20 15:53:41,147 INFO L125 PetriNetUnfolderBase]: For 74745/74745 co-relation queries the response was YES. [2024-06-20 15:53:41,151 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4901 conditions, 742 events. 379/742 cut-off events. For 74745/74745 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 3705 event pairs, 77 based on Foata normal form. 8/748 useless extension candidates. Maximal degree in co-relation 4817. Up to 493 conditions per place. [2024-06-20 15:53:41,154 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 107 selfloop transitions, 38 changer transitions 8/155 dead transitions. [2024-06-20 15:53:41,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 155 transitions, 1598 flow [2024-06-20 15:53:41,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:41,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:41,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-20 15:53:41,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212121212121212 [2024-06-20 15:53:41,155 INFO L175 Difference]: Start difference. First operand has 181 places, 128 transitions, 1030 flow. Second operand 11 states and 139 transitions. [2024-06-20 15:53:41,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 155 transitions, 1598 flow [2024-06-20 15:53:41,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 155 transitions, 1528 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:41,255 INFO L231 Difference]: Finished difference. Result has 184 places, 125 transitions, 1020 flow [2024-06-20 15:53:41,256 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=960, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1020, PETRI_PLACES=184, PETRI_TRANSITIONS=125} [2024-06-20 15:53:41,256 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 155 predicate places. [2024-06-20 15:53:41,256 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 125 transitions, 1020 flow [2024-06-20 15:53:41,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:41,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:41,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:41,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-20 15:53:41,256 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:41,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:41,257 INFO L85 PathProgramCache]: Analyzing trace with hash 1479232987, now seen corresponding path program 13 times [2024-06-20 15:53:41,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:41,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138718019] [2024-06-20 15:53:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:41,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:41,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:42,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:42,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:42,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138718019] [2024-06-20 15:53:42,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138718019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:42,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:42,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:42,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006252226] [2024-06-20 15:53:42,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:42,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:42,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:42,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:42,304 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:42,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 125 transitions, 1020 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:42,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:42,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:42,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:42,682 INFO L124 PetriNetUnfolderBase]: 347/678 cut-off events. [2024-06-20 15:53:42,683 INFO L125 PetriNetUnfolderBase]: For 61505/61505 co-relation queries the response was YES. [2024-06-20 15:53:42,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4074 conditions, 678 events. 347/678 cut-off events. For 61505/61505 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3319 event pairs, 64 based on Foata normal form. 10/686 useless extension candidates. Maximal degree in co-relation 3989. Up to 472 conditions per place. [2024-06-20 15:53:42,688 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 92 selfloop transitions, 41 changer transitions 13/148 dead transitions. [2024-06-20 15:53:42,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 148 transitions, 1424 flow [2024-06-20 15:53:42,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:42,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:42,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-20 15:53:42,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41818181818181815 [2024-06-20 15:53:42,690 INFO L175 Difference]: Start difference. First operand has 184 places, 125 transitions, 1020 flow. Second operand 11 states and 138 transitions. [2024-06-20 15:53:42,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 148 transitions, 1424 flow [2024-06-20 15:53:42,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 148 transitions, 1340 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:53:42,762 INFO L231 Difference]: Finished difference. Result has 181 places, 121 transitions, 994 flow [2024-06-20 15:53:42,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=938, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=994, PETRI_PLACES=181, PETRI_TRANSITIONS=121} [2024-06-20 15:53:42,762 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 152 predicate places. [2024-06-20 15:53:42,762 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 121 transitions, 994 flow [2024-06-20 15:53:42,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:42,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:42,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:42,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-20 15:53:42,763 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:42,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:42,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1656610461, now seen corresponding path program 3 times [2024-06-20 15:53:42,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:42,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003091748] [2024-06-20 15:53:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:42,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:42,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:43,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:43,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:43,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003091748] [2024-06-20 15:53:43,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003091748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:43,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:43,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:43,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976481447] [2024-06-20 15:53:43,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:43,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:43,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:43,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:43,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:44,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:44,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 121 transitions, 994 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:44,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:44,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:44,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:44,272 INFO L124 PetriNetUnfolderBase]: 326/635 cut-off events. [2024-06-20 15:53:44,272 INFO L125 PetriNetUnfolderBase]: For 43373/43373 co-relation queries the response was YES. [2024-06-20 15:53:44,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3836 conditions, 635 events. 326/635 cut-off events. For 43373/43373 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3053 event pairs, 58 based on Foata normal form. 2/635 useless extension candidates. Maximal degree in co-relation 3753. Up to 500 conditions per place. [2024-06-20 15:53:44,276 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 104 selfloop transitions, 32 changer transitions 0/138 dead transitions. [2024-06-20 15:53:44,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 138 transitions, 1322 flow [2024-06-20 15:53:44,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:44,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:44,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2024-06-20 15:53:44,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39666666666666667 [2024-06-20 15:53:44,277 INFO L175 Difference]: Start difference. First operand has 181 places, 121 transitions, 994 flow. Second operand 10 states and 119 transitions. [2024-06-20 15:53:44,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 138 transitions, 1322 flow [2024-06-20 15:53:44,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 138 transitions, 1222 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-20 15:53:44,345 INFO L231 Difference]: Finished difference. Result has 174 places, 122 transitions, 978 flow [2024-06-20 15:53:44,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=894, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=978, PETRI_PLACES=174, PETRI_TRANSITIONS=122} [2024-06-20 15:53:44,346 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 145 predicate places. [2024-06-20 15:53:44,346 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 122 transitions, 978 flow [2024-06-20 15:53:44,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:44,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:44,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:44,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-20 15:53:44,347 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:44,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1656364507, now seen corresponding path program 14 times [2024-06-20 15:53:44,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:44,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318965455] [2024-06-20 15:53:44,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:44,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:44,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:45,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:45,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:45,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318965455] [2024-06-20 15:53:45,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318965455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:45,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:45,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:45,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020238935] [2024-06-20 15:53:45,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:45,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:45,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:45,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:45,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:45,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:45,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 122 transitions, 978 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:45,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:45,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:45,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:46,215 INFO L124 PetriNetUnfolderBase]: 313/612 cut-off events. [2024-06-20 15:53:46,215 INFO L125 PetriNetUnfolderBase]: For 37585/37585 co-relation queries the response was YES. [2024-06-20 15:53:46,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3094 conditions, 612 events. 313/612 cut-off events. For 37585/37585 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 2927 event pairs, 51 based on Foata normal form. 10/620 useless extension candidates. Maximal degree in co-relation 3013. Up to 453 conditions per place. [2024-06-20 15:53:46,219 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 103 selfloop transitions, 28 changer transitions 11/144 dead transitions. [2024-06-20 15:53:46,219 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 144 transitions, 1368 flow [2024-06-20 15:53:46,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:46,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:46,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-20 15:53:46,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.396969696969697 [2024-06-20 15:53:46,219 INFO L175 Difference]: Start difference. First operand has 174 places, 122 transitions, 978 flow. Second operand 11 states and 131 transitions. [2024-06-20 15:53:46,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 144 transitions, 1368 flow [2024-06-20 15:53:46,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 144 transitions, 1294 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:46,279 INFO L231 Difference]: Finished difference. Result has 177 places, 119 transitions, 943 flow [2024-06-20 15:53:46,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=943, PETRI_PLACES=177, PETRI_TRANSITIONS=119} [2024-06-20 15:53:46,279 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 148 predicate places. [2024-06-20 15:53:46,279 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 119 transitions, 943 flow [2024-06-20 15:53:46,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:46,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:46,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:46,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-20 15:53:46,280 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:46,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:46,280 INFO L85 PathProgramCache]: Analyzing trace with hash 1191242019, now seen corresponding path program 15 times [2024-06-20 15:53:46,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:46,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104041088] [2024-06-20 15:53:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:46,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:46,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:47,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:47,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104041088] [2024-06-20 15:53:47,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104041088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:47,163 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:47,163 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:47,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525237569] [2024-06-20 15:53:47,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:47,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:47,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:47,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:47,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:47,288 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:47,288 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 119 transitions, 943 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:47,288 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:47,288 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:47,288 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:47,660 INFO L124 PetriNetUnfolderBase]: 328/649 cut-off events. [2024-06-20 15:53:47,660 INFO L125 PetriNetUnfolderBase]: For 51935/51935 co-relation queries the response was YES. [2024-06-20 15:53:47,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3795 conditions, 649 events. 328/649 cut-off events. For 51935/51935 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 3157 event pairs, 60 based on Foata normal form. 8/655 useless extension candidates. Maximal degree in co-relation 3713. Up to 381 conditions per place. [2024-06-20 15:53:47,663 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 98 selfloop transitions, 36 changer transitions 11/147 dead transitions. [2024-06-20 15:53:47,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 147 transitions, 1491 flow [2024-06-20 15:53:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:47,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-20 15:53:47,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4303030303030303 [2024-06-20 15:53:47,664 INFO L175 Difference]: Start difference. First operand has 177 places, 119 transitions, 943 flow. Second operand 11 states and 142 transitions. [2024-06-20 15:53:47,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 147 transitions, 1491 flow [2024-06-20 15:53:47,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 147 transitions, 1427 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:53:47,771 INFO L231 Difference]: Finished difference. Result has 174 places, 115 transitions, 934 flow [2024-06-20 15:53:47,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=883, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=934, PETRI_PLACES=174, PETRI_TRANSITIONS=115} [2024-06-20 15:53:47,772 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 145 predicate places. [2024-06-20 15:53:47,772 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 115 transitions, 934 flow [2024-06-20 15:53:47,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:47,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:47,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:47,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-20 15:53:47,772 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:47,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:47,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1483701637, now seen corresponding path program 16 times [2024-06-20 15:53:47,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:47,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135599237] [2024-06-20 15:53:47,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:47,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:48,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:48,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:48,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135599237] [2024-06-20 15:53:48,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135599237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:48,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:48,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:48,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067564026] [2024-06-20 15:53:48,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:48,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:48,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:48,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:48,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:48,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:48,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 115 transitions, 934 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:48,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:48,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:48,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:49,079 INFO L124 PetriNetUnfolderBase]: 314/623 cut-off events. [2024-06-20 15:53:49,079 INFO L125 PetriNetUnfolderBase]: For 50179/50179 co-relation queries the response was YES. [2024-06-20 15:53:49,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3574 conditions, 623 events. 314/623 cut-off events. For 50179/50179 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3012 event pairs, 69 based on Foata normal form. 10/631 useless extension candidates. Maximal degree in co-relation 3493. Up to 437 conditions per place. [2024-06-20 15:53:49,082 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 89 selfloop transitions, 35 changer transitions 11/137 dead transitions. [2024-06-20 15:53:49,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 137 transitions, 1310 flow [2024-06-20 15:53:49,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:49,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:49,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-20 15:53:49,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40606060606060607 [2024-06-20 15:53:49,084 INFO L175 Difference]: Start difference. First operand has 174 places, 115 transitions, 934 flow. Second operand 11 states and 134 transitions. [2024-06-20 15:53:49,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 137 transitions, 1310 flow [2024-06-20 15:53:49,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 137 transitions, 1229 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 15:53:49,154 INFO L231 Difference]: Finished difference. Result has 169 places, 112 transitions, 909 flow [2024-06-20 15:53:49,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=909, PETRI_PLACES=169, PETRI_TRANSITIONS=112} [2024-06-20 15:53:49,154 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 140 predicate places. [2024-06-20 15:53:49,154 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 112 transitions, 909 flow [2024-06-20 15:53:49,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:49,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:49,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:49,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-20 15:53:49,155 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:49,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:49,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1195825989, now seen corresponding path program 17 times [2024-06-20 15:53:49,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:49,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498462522] [2024-06-20 15:53:49,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:49,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:50,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:50,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498462522] [2024-06-20 15:53:50,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498462522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:50,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:50,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:50,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893587496] [2024-06-20 15:53:50,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:50,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:50,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:50,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:50,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:50,379 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:50,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 112 transitions, 909 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:50,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:50,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:50,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:50,669 INFO L124 PetriNetUnfolderBase]: 280/557 cut-off events. [2024-06-20 15:53:50,670 INFO L125 PetriNetUnfolderBase]: For 30129/30129 co-relation queries the response was YES. [2024-06-20 15:53:50,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2795 conditions, 557 events. 280/557 cut-off events. For 30129/30129 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 2623 event pairs, 47 based on Foata normal form. 8/563 useless extension candidates. Maximal degree in co-relation 2717. Up to 407 conditions per place. [2024-06-20 15:53:50,673 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 94 selfloop transitions, 23 changer transitions 14/133 dead transitions. [2024-06-20 15:53:50,673 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 133 transitions, 1247 flow [2024-06-20 15:53:50,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:50,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:50,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-20 15:53:50,674 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-20 15:53:50,674 INFO L175 Difference]: Start difference. First operand has 169 places, 112 transitions, 909 flow. Second operand 11 states and 129 transitions. [2024-06-20 15:53:50,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 133 transitions, 1247 flow [2024-06-20 15:53:50,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 133 transitions, 1167 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:53:50,737 INFO L231 Difference]: Finished difference. Result has 167 places, 107 transitions, 850 flow [2024-06-20 15:53:50,737 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=850, PETRI_PLACES=167, PETRI_TRANSITIONS=107} [2024-06-20 15:53:50,737 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 138 predicate places. [2024-06-20 15:53:50,738 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 107 transitions, 850 flow [2024-06-20 15:53:50,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:50,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:50,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:50,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-20 15:53:50,738 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:50,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:50,739 INFO L85 PathProgramCache]: Analyzing trace with hash -796050979, now seen corresponding path program 18 times [2024-06-20 15:53:50,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:50,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390423873] [2024-06-20 15:53:50,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:50,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:50,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:51,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:51,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390423873] [2024-06-20 15:53:51,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390423873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:51,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:51,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:51,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379910115] [2024-06-20 15:53:51,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:51,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:51,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:51,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:51,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:51,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:51,706 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 107 transitions, 850 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:51,706 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:51,706 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:51,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:52,046 INFO L124 PetriNetUnfolderBase]: 275/547 cut-off events. [2024-06-20 15:53:52,046 INFO L125 PetriNetUnfolderBase]: For 32249/32249 co-relation queries the response was YES. [2024-06-20 15:53:52,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2737 conditions, 547 events. 275/547 cut-off events. For 32249/32249 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2529 event pairs, 73 based on Foata normal form. 10/555 useless extension candidates. Maximal degree in co-relation 2660. Up to 420 conditions per place. [2024-06-20 15:53:52,049 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 86 selfloop transitions, 26 changer transitions 11/125 dead transitions. [2024-06-20 15:53:52,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 125 transitions, 1182 flow [2024-06-20 15:53:52,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:52,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:52,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-20 15:53:52,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38181818181818183 [2024-06-20 15:53:52,050 INFO L175 Difference]: Start difference. First operand has 167 places, 107 transitions, 850 flow. Second operand 11 states and 126 transitions. [2024-06-20 15:53:52,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 125 transitions, 1182 flow [2024-06-20 15:53:52,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 125 transitions, 1118 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-20 15:53:52,092 INFO L231 Difference]: Finished difference. Result has 158 places, 104 transitions, 827 flow [2024-06-20 15:53:52,093 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=827, PETRI_PLACES=158, PETRI_TRANSITIONS=104} [2024-06-20 15:53:52,093 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 129 predicate places. [2024-06-20 15:53:52,093 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 104 transitions, 827 flow [2024-06-20 15:53:52,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:52,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:52,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:52,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-20 15:53:52,093 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:52,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:52,094 INFO L85 PathProgramCache]: Analyzing trace with hash -385957361, now seen corresponding path program 19 times [2024-06-20 15:53:52,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:52,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036767800] [2024-06-20 15:53:52,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:52,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:52,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036767800] [2024-06-20 15:53:52,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036767800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:52,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:52,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:52,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587586200] [2024-06-20 15:53:52,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:52,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:52,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:52,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:52,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:53,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:53,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 104 transitions, 827 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:53,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:53,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:53,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:53,402 INFO L124 PetriNetUnfolderBase]: 263/527 cut-off events. [2024-06-20 15:53:53,402 INFO L125 PetriNetUnfolderBase]: For 24998/24998 co-relation queries the response was YES. [2024-06-20 15:53:53,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2572 conditions, 527 events. 263/527 cut-off events. For 24998/24998 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2424 event pairs, 69 based on Foata normal form. 8/533 useless extension candidates. Maximal degree in co-relation 2499. Up to 410 conditions per place. [2024-06-20 15:53:53,404 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 83 selfloop transitions, 23 changer transitions 13/121 dead transitions. [2024-06-20 15:53:53,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 121 transitions, 1125 flow [2024-06-20 15:53:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:53,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:53,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-20 15:53:53,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37272727272727274 [2024-06-20 15:53:53,405 INFO L175 Difference]: Start difference. First operand has 158 places, 104 transitions, 827 flow. Second operand 11 states and 123 transitions. [2024-06-20 15:53:53,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 121 transitions, 1125 flow [2024-06-20 15:53:53,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 121 transitions, 1052 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 15:53:53,446 INFO L231 Difference]: Finished difference. Result has 155 places, 100 transitions, 777 flow [2024-06-20 15:53:53,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=777, PETRI_PLACES=155, PETRI_TRANSITIONS=100} [2024-06-20 15:53:53,446 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 126 predicate places. [2024-06-20 15:53:53,446 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 100 transitions, 777 flow [2024-06-20 15:53:53,446 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:53,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:53,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:53,446 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-20 15:53:53,446 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:53,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:53,447 INFO L85 PathProgramCache]: Analyzing trace with hash -379277667, now seen corresponding path program 4 times [2024-06-20 15:53:53,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:53,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727832845] [2024-06-20 15:53:53,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:53,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:54,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:54,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727832845] [2024-06-20 15:53:54,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727832845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:54,493 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:54,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:54,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392381460] [2024-06-20 15:53:54,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:54,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:54,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:54,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:54,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:54,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:54,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 100 transitions, 777 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:54,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:54,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:54,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:54,838 INFO L124 PetriNetUnfolderBase]: 247/491 cut-off events. [2024-06-20 15:53:54,838 INFO L125 PetriNetUnfolderBase]: For 17030/17030 co-relation queries the response was YES. [2024-06-20 15:53:54,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2411 conditions, 491 events. 247/491 cut-off events. For 17030/17030 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2231 event pairs, 69 based on Foata normal form. 2/491 useless extension candidates. Maximal degree in co-relation 2340. Up to 430 conditions per place. [2024-06-20 15:53:54,840 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 94 selfloop transitions, 18 changer transitions 0/114 dead transitions. [2024-06-20 15:53:54,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 114 transitions, 1049 flow [2024-06-20 15:53:54,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:53:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:53:54,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-20 15:53:54,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36333333333333334 [2024-06-20 15:53:54,841 INFO L175 Difference]: Start difference. First operand has 155 places, 100 transitions, 777 flow. Second operand 10 states and 109 transitions. [2024-06-20 15:53:54,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 114 transitions, 1049 flow [2024-06-20 15:53:54,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 114 transitions, 993 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:53:54,876 INFO L231 Difference]: Finished difference. Result has 148 places, 101 transitions, 779 flow [2024-06-20 15:53:54,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=721, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=779, PETRI_PLACES=148, PETRI_TRANSITIONS=101} [2024-06-20 15:53:54,876 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 119 predicate places. [2024-06-20 15:53:54,876 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 101 transitions, 779 flow [2024-06-20 15:53:54,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:54,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:54,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:54,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-20 15:53:54,876 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:54,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:54,877 INFO L85 PathProgramCache]: Analyzing trace with hash -556659791, now seen corresponding path program 20 times [2024-06-20 15:53:54,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:54,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522011756] [2024-06-20 15:53:54,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:54,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:54,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:55,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:55,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:55,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522011756] [2024-06-20 15:53:55,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522011756] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:55,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:55,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:55,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748173885] [2024-06-20 15:53:55,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:55,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:55,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:55,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:55,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:55,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:55,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 101 transitions, 779 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:55,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:55,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:55,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:56,198 INFO L124 PetriNetUnfolderBase]: 294/588 cut-off events. [2024-06-20 15:53:56,198 INFO L125 PetriNetUnfolderBase]: For 31819/31819 co-relation queries the response was YES. [2024-06-20 15:53:56,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3174 conditions, 588 events. 294/588 cut-off events. For 31819/31819 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2743 event pairs, 82 based on Foata normal form. 8/594 useless extension candidates. Maximal degree in co-relation 3106. Up to 372 conditions per place. [2024-06-20 15:53:56,201 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 81 selfloop transitions, 37 changer transitions 7/127 dead transitions. [2024-06-20 15:53:56,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 127 transitions, 1241 flow [2024-06-20 15:53:56,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:56,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-20 15:53:56,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.403030303030303 [2024-06-20 15:53:56,202 INFO L175 Difference]: Start difference. First operand has 148 places, 101 transitions, 779 flow. Second operand 11 states and 133 transitions. [2024-06-20 15:53:56,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 127 transitions, 1241 flow [2024-06-20 15:53:56,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 127 transitions, 1193 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:56,252 INFO L231 Difference]: Finished difference. Result has 151 places, 101 transitions, 805 flow [2024-06-20 15:53:56,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=805, PETRI_PLACES=151, PETRI_TRANSITIONS=101} [2024-06-20 15:53:56,253 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2024-06-20 15:53:56,253 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 101 transitions, 805 flow [2024-06-20 15:53:56,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:56,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:56,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:56,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-20 15:53:56,253 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:56,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:56,253 INFO L85 PathProgramCache]: Analyzing trace with hash -552191141, now seen corresponding path program 21 times [2024-06-20 15:53:56,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:56,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717480036] [2024-06-20 15:53:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:56,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:57,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:57,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717480036] [2024-06-20 15:53:57,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717480036] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:57,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:57,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:57,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178527187] [2024-06-20 15:53:57,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:57,148 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:57,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:57,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:57,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:57,252 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:57,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 101 transitions, 805 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:57,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:57,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:57,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:57,581 INFO L124 PetriNetUnfolderBase]: 317/637 cut-off events. [2024-06-20 15:53:57,581 INFO L125 PetriNetUnfolderBase]: For 44184/44184 co-relation queries the response was YES. [2024-06-20 15:53:57,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3877 conditions, 637 events. 317/637 cut-off events. For 44184/44184 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 3065 event pairs, 99 based on Foata normal form. 8/643 useless extension candidates. Maximal degree in co-relation 3808. Up to 452 conditions per place. [2024-06-20 15:53:57,585 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 87 selfloop transitions, 28 changer transitions 7/124 dead transitions. [2024-06-20 15:53:57,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 124 transitions, 1249 flow [2024-06-20 15:53:57,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:57,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:57,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-20 15:53:57,585 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-20 15:53:57,586 INFO L175 Difference]: Start difference. First operand has 151 places, 101 transitions, 805 flow. Second operand 11 states and 129 transitions. [2024-06-20 15:53:57,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 124 transitions, 1249 flow [2024-06-20 15:53:57,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 124 transitions, 1187 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-20 15:53:57,636 INFO L231 Difference]: Finished difference. Result has 152 places, 99 transitions, 791 flow [2024-06-20 15:53:57,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=791, PETRI_PLACES=152, PETRI_TRANSITIONS=99} [2024-06-20 15:53:57,636 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 123 predicate places. [2024-06-20 15:53:57,636 INFO L495 AbstractCegarLoop]: Abstraction has has 152 places, 99 transitions, 791 flow [2024-06-20 15:53:57,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:57,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:57,636 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:57,636 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-20 15:53:57,636 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:57,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:57,637 INFO L85 PathProgramCache]: Analyzing trace with hash -556775111, now seen corresponding path program 22 times [2024-06-20 15:53:57,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:57,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076481948] [2024-06-20 15:53:57,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:57,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:57,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:53:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:53:58,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:53:58,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076481948] [2024-06-20 15:53:58,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076481948] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:53:58,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:53:58,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:53:58,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694726871] [2024-06-20 15:53:58,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:53:58,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:53:58,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:53:58,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:53:58,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:53:58,788 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:53:58,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 99 transitions, 791 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:58,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:53:58,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:53:58,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:53:59,185 INFO L124 PetriNetUnfolderBase]: 340/686 cut-off events. [2024-06-20 15:53:59,185 INFO L125 PetriNetUnfolderBase]: For 52953/52953 co-relation queries the response was YES. [2024-06-20 15:53:59,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4486 conditions, 686 events. 340/686 cut-off events. For 52953/52953 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3375 event pairs, 108 based on Foata normal form. 8/692 useless extension candidates. Maximal degree in co-relation 4418. Up to 358 conditions per place. [2024-06-20 15:53:59,189 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 88 selfloop transitions, 22 changer transitions 10/122 dead transitions. [2024-06-20 15:53:59,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 122 transitions, 1227 flow [2024-06-20 15:53:59,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:53:59,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:53:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-20 15:53:59,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3878787878787879 [2024-06-20 15:53:59,191 INFO L175 Difference]: Start difference. First operand has 152 places, 99 transitions, 791 flow. Second operand 11 states and 128 transitions. [2024-06-20 15:53:59,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 122 transitions, 1227 flow [2024-06-20 15:53:59,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 122 transitions, 1154 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:53:59,252 INFO L231 Difference]: Finished difference. Result has 151 places, 96 transitions, 751 flow [2024-06-20 15:53:59,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=751, PETRI_PLACES=151, PETRI_TRANSITIONS=96} [2024-06-20 15:53:59,253 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 122 predicate places. [2024-06-20 15:53:59,253 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 96 transitions, 751 flow [2024-06-20 15:53:59,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:53:59,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:53:59,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:53:59,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-20 15:53:59,253 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:53:59,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:53:59,254 INFO L85 PathProgramCache]: Analyzing trace with hash -552186491, now seen corresponding path program 23 times [2024-06-20 15:53:59,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:53:59,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127377989] [2024-06-20 15:53:59,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:53:59,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:53:59,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:00,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:00,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127377989] [2024-06-20 15:54:00,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127377989] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:00,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:00,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:00,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431985523] [2024-06-20 15:54:00,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:00,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:00,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:00,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:00,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:00,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 96 transitions, 751 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:00,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:00,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:00,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:00,605 INFO L124 PetriNetUnfolderBase]: 305/617 cut-off events. [2024-06-20 15:54:00,605 INFO L125 PetriNetUnfolderBase]: For 42657/42657 co-relation queries the response was YES. [2024-06-20 15:54:00,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3749 conditions, 617 events. 305/617 cut-off events. For 42657/42657 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2974 event pairs, 109 based on Foata normal form. 10/625 useless extension candidates. Maximal degree in co-relation 3682. Up to 493 conditions per place. [2024-06-20 15:54:00,608 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 73 selfloop transitions, 24 changer transitions 15/114 dead transitions. [2024-06-20 15:54:00,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 114 transitions, 1053 flow [2024-06-20 15:54:00,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:00,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:00,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 123 transitions. [2024-06-20 15:54:00,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37272727272727274 [2024-06-20 15:54:00,609 INFO L175 Difference]: Start difference. First operand has 151 places, 96 transitions, 751 flow. Second operand 11 states and 123 transitions. [2024-06-20 15:54:00,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 114 transitions, 1053 flow [2024-06-20 15:54:00,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 114 transitions, 1010 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:00,652 INFO L231 Difference]: Finished difference. Result has 148 places, 91 transitions, 717 flow [2024-06-20 15:54:00,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=717, PETRI_PLACES=148, PETRI_TRANSITIONS=91} [2024-06-20 15:54:00,652 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 119 predicate places. [2024-06-20 15:54:00,652 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 91 transitions, 717 flow [2024-06-20 15:54:00,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:00,653 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:00,653 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:00,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-20 15:54:00,653 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:00,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:00,653 INFO L85 PathProgramCache]: Analyzing trace with hash -556655141, now seen corresponding path program 24 times [2024-06-20 15:54:00,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:00,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587312459] [2024-06-20 15:54:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:00,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:00,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:01,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:01,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587312459] [2024-06-20 15:54:01,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587312459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:01,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:01,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:01,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81125581] [2024-06-20 15:54:01,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:01,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:01,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:01,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:01,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:01,775 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:01,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 91 transitions, 717 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:01,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:01,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:01,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:02,130 INFO L124 PetriNetUnfolderBase]: 266/540 cut-off events. [2024-06-20 15:54:02,130 INFO L125 PetriNetUnfolderBase]: For 29880/29880 co-relation queries the response was YES. [2024-06-20 15:54:02,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2971 conditions, 540 events. 266/540 cut-off events. For 29880/29880 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2492 event pairs, 90 based on Foata normal form. 10/548 useless extension candidates. Maximal degree in co-relation 2906. Up to 433 conditions per place. [2024-06-20 15:54:02,132 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 77 selfloop transitions, 15 changer transitions 15/109 dead transitions. [2024-06-20 15:54:02,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 109 transitions, 1009 flow [2024-06-20 15:54:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:02,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-20 15:54:02,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3696969696969697 [2024-06-20 15:54:02,133 INFO L175 Difference]: Start difference. First operand has 148 places, 91 transitions, 717 flow. Second operand 11 states and 122 transitions. [2024-06-20 15:54:02,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 109 transitions, 1009 flow [2024-06-20 15:54:02,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 109 transitions, 948 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:02,168 INFO L231 Difference]: Finished difference. Result has 141 places, 85 transitions, 648 flow [2024-06-20 15:54:02,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=658, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=648, PETRI_PLACES=141, PETRI_TRANSITIONS=85} [2024-06-20 15:54:02,168 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 112 predicate places. [2024-06-20 15:54:02,168 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 85 transitions, 648 flow [2024-06-20 15:54:02,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:02,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:02,168 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:02,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-20 15:54:02,169 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:02,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:02,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1297364319, now seen corresponding path program 5 times [2024-06-20 15:54:02,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:02,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65645433] [2024-06-20 15:54:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:02,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:02,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:03,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:03,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:03,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65645433] [2024-06-20 15:54:03,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65645433] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:03,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:03,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:03,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405190695] [2024-06-20 15:54:03,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:03,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:03,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:03,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:03,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:03,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:03,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 85 transitions, 648 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:03,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:03,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:03,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:03,626 INFO L124 PetriNetUnfolderBase]: 243/491 cut-off events. [2024-06-20 15:54:03,626 INFO L125 PetriNetUnfolderBase]: For 20588/20588 co-relation queries the response was YES. [2024-06-20 15:54:03,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2709 conditions, 491 events. 243/491 cut-off events. For 20588/20588 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2197 event pairs, 86 based on Foata normal form. 2/491 useless extension candidates. Maximal degree in co-relation 2646. Up to 451 conditions per place. [2024-06-20 15:54:03,628 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 80 selfloop transitions, 16 changer transitions 0/98 dead transitions. [2024-06-20 15:54:03,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 98 transitions, 888 flow [2024-06-20 15:54:03,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:03,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-20 15:54:03,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35333333333333333 [2024-06-20 15:54:03,629 INFO L175 Difference]: Start difference. First operand has 141 places, 85 transitions, 648 flow. Second operand 10 states and 106 transitions. [2024-06-20 15:54:03,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 98 transitions, 888 flow [2024-06-20 15:54:03,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 98 transitions, 846 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 15:54:03,658 INFO L231 Difference]: Finished difference. Result has 131 places, 86 transitions, 662 flow [2024-06-20 15:54:03,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=662, PETRI_PLACES=131, PETRI_TRANSITIONS=86} [2024-06-20 15:54:03,658 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 102 predicate places. [2024-06-20 15:54:03,658 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 86 transitions, 662 flow [2024-06-20 15:54:03,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:03,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:03,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:03,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-20 15:54:03,659 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:03,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:03,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1772344101, now seen corresponding path program 25 times [2024-06-20 15:54:03,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:03,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672263683] [2024-06-20 15:54:03,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:03,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:04,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:04,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672263683] [2024-06-20 15:54:04,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672263683] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:04,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:04,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:04,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146642014] [2024-06-20 15:54:04,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:04,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:04,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:04,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:04,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:05,068 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:05,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 86 transitions, 662 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:05,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:05,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:05,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:05,411 INFO L124 PetriNetUnfolderBase]: 263/535 cut-off events. [2024-06-20 15:54:05,411 INFO L125 PetriNetUnfolderBase]: For 23881/23881 co-relation queries the response was YES. [2024-06-20 15:54:05,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2805 conditions, 535 events. 263/535 cut-off events. For 23881/23881 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2476 event pairs, 94 based on Foata normal form. 12/545 useless extension candidates. Maximal degree in co-relation 2746. Up to 420 conditions per place. [2024-06-20 15:54:05,413 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 69 selfloop transitions, 14 changer transitions 20/105 dead transitions. [2024-06-20 15:54:05,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 105 transitions, 962 flow [2024-06-20 15:54:05,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:05,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-20 15:54:05,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36666666666666664 [2024-06-20 15:54:05,414 INFO L175 Difference]: Start difference. First operand has 131 places, 86 transitions, 662 flow. Second operand 11 states and 121 transitions. [2024-06-20 15:54:05,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 105 transitions, 962 flow [2024-06-20 15:54:05,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 105 transitions, 906 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-20 15:54:05,439 INFO L231 Difference]: Finished difference. Result has 135 places, 77 transitions, 578 flow [2024-06-20 15:54:05,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=578, PETRI_PLACES=135, PETRI_TRANSITIONS=77} [2024-06-20 15:54:05,439 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 106 predicate places. [2024-06-20 15:54:05,439 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 77 transitions, 578 flow [2024-06-20 15:54:05,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:05,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:05,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:05,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-20 15:54:05,440 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:05,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:05,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1014953293, now seen corresponding path program 6 times [2024-06-20 15:54:05,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:05,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087458578] [2024-06-20 15:54:05,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:05,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:05,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:06,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:06,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087458578] [2024-06-20 15:54:06,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087458578] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:06,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:06,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:06,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544903873] [2024-06-20 15:54:06,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:06,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:06,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:06,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:06,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:06,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:06,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 77 transitions, 578 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:06,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:06,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:06,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:06,704 INFO L124 PetriNetUnfolderBase]: 222/460 cut-off events. [2024-06-20 15:54:06,704 INFO L125 PetriNetUnfolderBase]: For 17721/17721 co-relation queries the response was YES. [2024-06-20 15:54:06,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2509 conditions, 460 events. 222/460 cut-off events. For 17721/17721 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2029 event pairs, 88 based on Foata normal form. 2/460 useless extension candidates. Maximal degree in co-relation 2449. Up to 415 conditions per place. [2024-06-20 15:54:06,706 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 73 selfloop transitions, 15 changer transitions 0/90 dead transitions. [2024-06-20 15:54:06,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 90 transitions, 800 flow [2024-06-20 15:54:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-20 15:54:06,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3466666666666667 [2024-06-20 15:54:06,707 INFO L175 Difference]: Start difference. First operand has 135 places, 77 transitions, 578 flow. Second operand 10 states and 104 transitions. [2024-06-20 15:54:06,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 90 transitions, 800 flow [2024-06-20 15:54:06,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 90 transitions, 745 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-20 15:54:06,746 INFO L231 Difference]: Finished difference. Result has 127 places, 78 transitions, 579 flow [2024-06-20 15:54:06,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=579, PETRI_PLACES=127, PETRI_TRANSITIONS=78} [2024-06-20 15:54:06,747 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2024-06-20 15:54:06,747 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 78 transitions, 579 flow [2024-06-20 15:54:06,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:06,747 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:06,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:06,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-20 15:54:06,748 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:06,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:06,748 INFO L85 PathProgramCache]: Analyzing trace with hash -416279657, now seen corresponding path program 26 times [2024-06-20 15:54:06,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:06,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919607614] [2024-06-20 15:54:06,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:06,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:07,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:07,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:07,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919607614] [2024-06-20 15:54:07,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919607614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:07,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:07,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:07,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935264314] [2024-06-20 15:54:07,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:07,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:07,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:07,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:07,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:07,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:07,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 78 transitions, 579 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:07,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:07,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:07,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:08,056 INFO L124 PetriNetUnfolderBase]: 231/483 cut-off events. [2024-06-20 15:54:08,056 INFO L125 PetriNetUnfolderBase]: For 19726/19726 co-relation queries the response was YES. [2024-06-20 15:54:08,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2423 conditions, 483 events. 231/483 cut-off events. For 19726/19726 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2187 event pairs, 95 based on Foata normal form. 10/491 useless extension candidates. Maximal degree in co-relation 2366. Up to 388 conditions per place. [2024-06-20 15:54:08,059 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 65 selfloop transitions, 17 changer transitions 11/95 dead transitions. [2024-06-20 15:54:08,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 95 transitions, 831 flow [2024-06-20 15:54:08,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:08,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-20 15:54:08,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-20 15:54:08,061 INFO L175 Difference]: Start difference. First operand has 127 places, 78 transitions, 579 flow. Second operand 11 states and 120 transitions. [2024-06-20 15:54:08,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 95 transitions, 831 flow [2024-06-20 15:54:08,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 95 transitions, 787 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-20 15:54:08,082 INFO L231 Difference]: Finished difference. Result has 130 places, 75 transitions, 552 flow [2024-06-20 15:54:08,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=535, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=552, PETRI_PLACES=130, PETRI_TRANSITIONS=75} [2024-06-20 15:54:08,082 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 101 predicate places. [2024-06-20 15:54:08,082 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 75 transitions, 552 flow [2024-06-20 15:54:08,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:08,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:08,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:08,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-20 15:54:08,083 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:08,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:08,083 INFO L85 PathProgramCache]: Analyzing trace with hash -416284307, now seen corresponding path program 27 times [2024-06-20 15:54:08,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:08,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476396515] [2024-06-20 15:54:08,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:08,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:09,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:09,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:09,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476396515] [2024-06-20 15:54:09,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476396515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:09,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:09,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:09,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371571323] [2024-06-20 15:54:09,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:09,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:09,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:09,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:09,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:09,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:09,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 75 transitions, 552 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:09,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:09,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:09,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:09,434 INFO L124 PetriNetUnfolderBase]: 197/417 cut-off events. [2024-06-20 15:54:09,434 INFO L125 PetriNetUnfolderBase]: For 13902/13902 co-relation queries the response was YES. [2024-06-20 15:54:09,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1892 conditions, 417 events. 197/417 cut-off events. For 13902/13902 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1820 event pairs, 73 based on Foata normal form. 8/423 useless extension candidates. Maximal degree in co-relation 1834. Up to 332 conditions per place. [2024-06-20 15:54:09,436 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 62 selfloop transitions, 14 changer transitions 13/91 dead transitions. [2024-06-20 15:54:09,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 91 transitions, 782 flow [2024-06-20 15:54:09,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:09,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:09,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-20 15:54:09,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-06-20 15:54:09,437 INFO L175 Difference]: Start difference. First operand has 130 places, 75 transitions, 552 flow. Second operand 11 states and 117 transitions. [2024-06-20 15:54:09,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 91 transitions, 782 flow [2024-06-20 15:54:09,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 91 transitions, 744 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:09,453 INFO L231 Difference]: Finished difference. Result has 128 places, 71 transitions, 515 flow [2024-06-20 15:54:09,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=515, PETRI_PLACES=128, PETRI_TRANSITIONS=71} [2024-06-20 15:54:09,453 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 99 predicate places. [2024-06-20 15:54:09,453 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 71 transitions, 515 flow [2024-06-20 15:54:09,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:09,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:09,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:09,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-20 15:54:09,454 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:09,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash -1048023395, now seen corresponding path program 7 times [2024-06-20 15:54:09,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:09,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090797453] [2024-06-20 15:54:09,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:09,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:10,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:10,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090797453] [2024-06-20 15:54:10,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090797453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:10,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:10,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:10,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904610140] [2024-06-20 15:54:10,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:10,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:10,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:10,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:10,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:10,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:10,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 71 transitions, 515 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:10,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:10,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:10,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:10,884 INFO L124 PetriNetUnfolderBase]: 181/381 cut-off events. [2024-06-20 15:54:10,885 INFO L125 PetriNetUnfolderBase]: For 9520/9520 co-relation queries the response was YES. [2024-06-20 15:54:10,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1779 conditions, 381 events. 181/381 cut-off events. For 9520/9520 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1619 event pairs, 73 based on Foata normal form. 2/381 useless extension candidates. Maximal degree in co-relation 1722. Up to 333 conditions per place. [2024-06-20 15:54:10,887 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 66 selfloop transitions, 16 changer transitions 0/84 dead transitions. [2024-06-20 15:54:10,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 84 transitions, 727 flow [2024-06-20 15:54:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:10,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:10,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-20 15:54:10,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35 [2024-06-20 15:54:10,889 INFO L175 Difference]: Start difference. First operand has 128 places, 71 transitions, 515 flow. Second operand 10 states and 105 transitions. [2024-06-20 15:54:10,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 84 transitions, 727 flow [2024-06-20 15:54:10,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 84 transitions, 685 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-20 15:54:10,904 INFO L231 Difference]: Finished difference. Result has 119 places, 72 transitions, 531 flow [2024-06-20 15:54:10,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=531, PETRI_PLACES=119, PETRI_TRANSITIONS=72} [2024-06-20 15:54:10,904 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 90 predicate places. [2024-06-20 15:54:10,904 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 72 transitions, 531 flow [2024-06-20 15:54:10,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:10,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:10,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:10,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-20 15:54:10,905 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:10,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:10,906 INFO L85 PathProgramCache]: Analyzing trace with hash -409604613, now seen corresponding path program 8 times [2024-06-20 15:54:10,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:10,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200650422] [2024-06-20 15:54:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:10,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:11,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:11,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:11,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200650422] [2024-06-20 15:54:11,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200650422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:11,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:11,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:11,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956437870] [2024-06-20 15:54:11,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:11,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:11,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:11,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:11,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:11,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:11,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 72 transitions, 531 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:11,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:11,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:11,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:12,157 INFO L124 PetriNetUnfolderBase]: 178/376 cut-off events. [2024-06-20 15:54:12,157 INFO L125 PetriNetUnfolderBase]: For 7436/7436 co-relation queries the response was YES. [2024-06-20 15:54:12,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 376 events. 178/376 cut-off events. For 7436/7436 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1589 event pairs, 72 based on Foata normal form. 2/376 useless extension candidates. Maximal degree in co-relation 1606. Up to 336 conditions per place. [2024-06-20 15:54:12,159 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 69 selfloop transitions, 13 changer transitions 0/84 dead transitions. [2024-06-20 15:54:12,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 84 transitions, 723 flow [2024-06-20 15:54:12,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-20 15:54:12,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-20 15:54:12,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 103 transitions. [2024-06-20 15:54:12,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3433333333333333 [2024-06-20 15:54:12,160 INFO L175 Difference]: Start difference. First operand has 119 places, 72 transitions, 531 flow. Second operand 10 states and 103 transitions. [2024-06-20 15:54:12,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 84 transitions, 723 flow [2024-06-20 15:54:12,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 84 transitions, 665 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:12,174 INFO L231 Difference]: Finished difference. Result has 120 places, 72 transitions, 503 flow [2024-06-20 15:54:12,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=503, PETRI_PLACES=120, PETRI_TRANSITIONS=72} [2024-06-20 15:54:12,175 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 91 predicate places. [2024-06-20 15:54:12,175 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 72 transitions, 503 flow [2024-06-20 15:54:12,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:12,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:12,176 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:12,176 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-20 15:54:12,176 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:12,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:12,176 INFO L85 PathProgramCache]: Analyzing trace with hash 174578981, now seen corresponding path program 28 times [2024-06-20 15:54:12,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:12,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873323096] [2024-06-20 15:54:12,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:12,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:13,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:13,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:13,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873323096] [2024-06-20 15:54:13,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873323096] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:13,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:13,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:13,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841170473] [2024-06-20 15:54:13,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:13,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:13,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:13,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:13,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:13,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:13,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 72 transitions, 503 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:13,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:13,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:13,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:13,741 INFO L124 PetriNetUnfolderBase]: 252/531 cut-off events. [2024-06-20 15:54:13,741 INFO L125 PetriNetUnfolderBase]: For 15971/15975 co-relation queries the response was YES. [2024-06-20 15:54:13,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2365 conditions, 531 events. 252/531 cut-off events. For 15971/15975 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 2498 event pairs, 65 based on Foata normal form. 10/539 useless extension candidates. Maximal degree in co-relation 2310. Up to 342 conditions per place. [2024-06-20 15:54:13,744 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 86 selfloop transitions, 17 changer transitions 14/119 dead transitions. [2024-06-20 15:54:13,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 119 transitions, 994 flow [2024-06-20 15:54:13,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 15:54:13,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 15:54:13,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 155 transitions. [2024-06-20 15:54:13,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-20 15:54:13,745 INFO L175 Difference]: Start difference. First operand has 120 places, 72 transitions, 503 flow. Second operand 14 states and 155 transitions. [2024-06-20 15:54:13,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 119 transitions, 994 flow [2024-06-20 15:54:13,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 119 transitions, 897 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-20 15:54:13,763 INFO L231 Difference]: Finished difference. Result has 127 places, 78 transitions, 514 flow [2024-06-20 15:54:13,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=420, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=514, PETRI_PLACES=127, PETRI_TRANSITIONS=78} [2024-06-20 15:54:13,764 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 98 predicate places. [2024-06-20 15:54:13,764 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 78 transitions, 514 flow [2024-06-20 15:54:13,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:13,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:13,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:13,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-20 15:54:13,764 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:13,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash 219957685, now seen corresponding path program 29 times [2024-06-20 15:54:13,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:13,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742828129] [2024-06-20 15:54:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:13,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:14,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:14,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:14,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742828129] [2024-06-20 15:54:14,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742828129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:14,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:14,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:14,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374653210] [2024-06-20 15:54:14,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:14,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:14,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:14,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:14,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:14,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:14,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 78 transitions, 514 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:14,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:14,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:14,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:15,174 INFO L124 PetriNetUnfolderBase]: 284/603 cut-off events. [2024-06-20 15:54:15,175 INFO L125 PetriNetUnfolderBase]: For 20821/20821 co-relation queries the response was YES. [2024-06-20 15:54:15,176 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 603 events. 284/603 cut-off events. For 20821/20821 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2962 event pairs, 104 based on Foata normal form. 8/609 useless extension candidates. Maximal degree in co-relation 2734. Up to 414 conditions per place. [2024-06-20 15:54:15,177 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 86 selfloop transitions, 18 changer transitions 14/120 dead transitions. [2024-06-20 15:54:15,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 120 transitions, 991 flow [2024-06-20 15:54:15,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:54:15,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:54:15,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-06-20 15:54:15,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2024-06-20 15:54:15,178 INFO L175 Difference]: Start difference. First operand has 127 places, 78 transitions, 514 flow. Second operand 13 states and 147 transitions. [2024-06-20 15:54:15,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 120 transitions, 991 flow [2024-06-20 15:54:15,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 120 transitions, 941 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:15,205 INFO L231 Difference]: Finished difference. Result has 133 places, 82 transitions, 572 flow [2024-06-20 15:54:15,205 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=476, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=572, PETRI_PLACES=133, PETRI_TRANSITIONS=82} [2024-06-20 15:54:15,205 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 104 predicate places. [2024-06-20 15:54:15,205 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 82 transitions, 572 flow [2024-06-20 15:54:15,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:15,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:15,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:15,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-20 15:54:15,206 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:15,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:15,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1975030833, now seen corresponding path program 30 times [2024-06-20 15:54:15,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:15,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240819046] [2024-06-20 15:54:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:15,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:15,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:16,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:16,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240819046] [2024-06-20 15:54:16,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240819046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:16,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:16,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:16,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617282246] [2024-06-20 15:54:16,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:16,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:16,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:16,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:16,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:16,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:16,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 82 transitions, 572 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:16,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:16,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:16,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:16,604 INFO L124 PetriNetUnfolderBase]: 289/620 cut-off events. [2024-06-20 15:54:16,605 INFO L125 PetriNetUnfolderBase]: For 23205/23205 co-relation queries the response was YES. [2024-06-20 15:54:16,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 620 events. 289/620 cut-off events. For 23205/23205 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3081 event pairs, 96 based on Foata normal form. 8/626 useless extension candidates. Maximal degree in co-relation 2934. Up to 264 conditions per place. [2024-06-20 15:54:16,607 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 75 selfloop transitions, 22 changer transitions 17/116 dead transitions. [2024-06-20 15:54:16,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 116 transitions, 980 flow [2024-06-20 15:54:16,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:54:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:54:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-06-20 15:54:16,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3769230769230769 [2024-06-20 15:54:16,608 INFO L175 Difference]: Start difference. First operand has 133 places, 82 transitions, 572 flow. Second operand 13 states and 147 transitions. [2024-06-20 15:54:16,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 116 transitions, 980 flow [2024-06-20 15:54:16,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 116 transitions, 937 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-20 15:54:16,636 INFO L231 Difference]: Finished difference. Result has 139 places, 82 transitions, 597 flow [2024-06-20 15:54:16,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=537, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=597, PETRI_PLACES=139, PETRI_TRANSITIONS=82} [2024-06-20 15:54:16,636 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 110 predicate places. [2024-06-20 15:54:16,636 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 82 transitions, 597 flow [2024-06-20 15:54:16,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:16,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:16,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:16,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-20 15:54:16,637 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:16,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:16,637 INFO L85 PathProgramCache]: Analyzing trace with hash -669430573, now seen corresponding path program 31 times [2024-06-20 15:54:16,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:16,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655559302] [2024-06-20 15:54:16,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:16,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:16,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:17,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:17,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:17,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655559302] [2024-06-20 15:54:17,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655559302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:17,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:17,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:17,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065115897] [2024-06-20 15:54:17,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:17,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:17,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:17,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:17,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:17,599 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:17,599 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 82 transitions, 597 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:17,599 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:17,599 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:17,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:17,924 INFO L124 PetriNetUnfolderBase]: 274/589 cut-off events. [2024-06-20 15:54:17,924 INFO L125 PetriNetUnfolderBase]: For 23252/23252 co-relation queries the response was YES. [2024-06-20 15:54:17,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2927 conditions, 589 events. 274/589 cut-off events. For 23252/23252 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2881 event pairs, 106 based on Foata normal form. 8/595 useless extension candidates. Maximal degree in co-relation 2863. Up to 397 conditions per place. [2024-06-20 15:54:17,927 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 76 selfloop transitions, 22 changer transitions 16/116 dead transitions. [2024-06-20 15:54:17,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 116 transitions, 1016 flow [2024-06-20 15:54:17,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:54:17,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:54:17,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 146 transitions. [2024-06-20 15:54:17,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37435897435897436 [2024-06-20 15:54:17,928 INFO L175 Difference]: Start difference. First operand has 139 places, 82 transitions, 597 flow. Second operand 13 states and 146 transitions. [2024-06-20 15:54:17,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 116 transitions, 1016 flow [2024-06-20 15:54:17,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 116 transitions, 967 flow, removed 5 selfloop flow, removed 11 redundant places. [2024-06-20 15:54:17,959 INFO L231 Difference]: Finished difference. Result has 137 places, 78 transitions, 572 flow [2024-06-20 15:54:17,959 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=572, PETRI_PLACES=137, PETRI_TRANSITIONS=78} [2024-06-20 15:54:17,960 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 108 predicate places. [2024-06-20 15:54:17,960 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 78 transitions, 572 flow [2024-06-20 15:54:17,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:17,960 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:17,960 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:17,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-20 15:54:17,960 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:17,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:17,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1879195347, now seen corresponding path program 32 times [2024-06-20 15:54:17,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:17,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037477614] [2024-06-20 15:54:17,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:17,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:17,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:18,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:18,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:18,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037477614] [2024-06-20 15:54:18,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037477614] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:18,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:18,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:18,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194568005] [2024-06-20 15:54:18,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:18,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:18,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:18,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:18,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:18,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:18,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 78 transitions, 572 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:18,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:18,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:18,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:19,236 INFO L124 PetriNetUnfolderBase]: 234/507 cut-off events. [2024-06-20 15:54:19,236 INFO L125 PetriNetUnfolderBase]: For 18341/18341 co-relation queries the response was YES. [2024-06-20 15:54:19,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2397 conditions, 507 events. 234/507 cut-off events. For 18341/18341 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 2402 event pairs, 85 based on Foata normal form. 8/513 useless extension candidates. Maximal degree in co-relation 2336. Up to 391 conditions per place. [2024-06-20 15:54:19,238 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 64 selfloop transitions, 19 changer transitions 19/104 dead transitions. [2024-06-20 15:54:19,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 104 transitions, 855 flow [2024-06-20 15:54:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:54:19,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:54:19,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 136 transitions. [2024-06-20 15:54:19,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3487179487179487 [2024-06-20 15:54:19,239 INFO L175 Difference]: Start difference. First operand has 137 places, 78 transitions, 572 flow. Second operand 13 states and 136 transitions. [2024-06-20 15:54:19,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 104 transitions, 855 flow [2024-06-20 15:54:19,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 104 transitions, 782 flow, removed 10 selfloop flow, removed 15 redundant places. [2024-06-20 15:54:19,259 INFO L231 Difference]: Finished difference. Result has 132 places, 75 transitions, 523 flow [2024-06-20 15:54:19,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=499, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=523, PETRI_PLACES=132, PETRI_TRANSITIONS=75} [2024-06-20 15:54:19,260 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 103 predicate places. [2024-06-20 15:54:19,260 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 75 transitions, 523 flow [2024-06-20 15:54:19,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:19,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:19,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:19,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-20 15:54:19,260 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:19,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:19,260 INFO L85 PathProgramCache]: Analyzing trace with hash -115486803, now seen corresponding path program 33 times [2024-06-20 15:54:19,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:19,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522421865] [2024-06-20 15:54:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:19,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:20,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:20,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522421865] [2024-06-20 15:54:20,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522421865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:20,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:20,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:20,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576350217] [2024-06-20 15:54:20,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:20,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:20,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:20,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:20,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:20,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:20,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 75 transitions, 523 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:20,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:20,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:20,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:20,617 INFO L124 PetriNetUnfolderBase]: 222/479 cut-off events. [2024-06-20 15:54:20,618 INFO L125 PetriNetUnfolderBase]: For 15305/15305 co-relation queries the response was YES. [2024-06-20 15:54:20,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2243 conditions, 479 events. 222/479 cut-off events. For 15305/15305 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2203 event pairs, 80 based on Foata normal form. 8/485 useless extension candidates. Maximal degree in co-relation 2187. Up to 384 conditions per place. [2024-06-20 15:54:20,620 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 68 selfloop transitions, 16 changer transitions 16/102 dead transitions. [2024-06-20 15:54:20,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 102 transitions, 812 flow [2024-06-20 15:54:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-20 15:54:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-20 15:54:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 145 transitions. [2024-06-20 15:54:20,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-20 15:54:20,621 INFO L175 Difference]: Start difference. First operand has 132 places, 75 transitions, 523 flow. Second operand 14 states and 145 transitions. [2024-06-20 15:54:20,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 102 transitions, 812 flow [2024-06-20 15:54:20,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 102 transitions, 752 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-20 15:54:20,638 INFO L231 Difference]: Finished difference. Result has 130 places, 73 transitions, 493 flow [2024-06-20 15:54:20,638 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=469, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=493, PETRI_PLACES=130, PETRI_TRANSITIONS=73} [2024-06-20 15:54:20,638 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 101 predicate places. [2024-06-20 15:54:20,639 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 73 transitions, 493 flow [2024-06-20 15:54:20,639 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:20,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:20,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:20,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-20 15:54:20,639 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:20,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1590963983, now seen corresponding path program 34 times [2024-06-20 15:54:20,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:20,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147431061] [2024-06-20 15:54:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:20,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:21,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:21,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:21,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147431061] [2024-06-20 15:54:21,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147431061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:21,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:21,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:21,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030618102] [2024-06-20 15:54:21,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:21,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:21,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:21,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:21,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:21,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:21,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 73 transitions, 493 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:21,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:21,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:21,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:22,009 INFO L124 PetriNetUnfolderBase]: 187/407 cut-off events. [2024-06-20 15:54:22,009 INFO L125 PetriNetUnfolderBase]: For 11225/11225 co-relation queries the response was YES. [2024-06-20 15:54:22,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1744 conditions, 407 events. 187/407 cut-off events. For 11225/11225 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1773 event pairs, 49 based on Foata normal form. 8/413 useless extension candidates. Maximal degree in co-relation 1688. Up to 320 conditions per place. [2024-06-20 15:54:22,012 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 63 selfloop transitions, 11 changer transitions 21/97 dead transitions. [2024-06-20 15:54:22,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 97 transitions, 754 flow [2024-06-20 15:54:22,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:54:22,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:54:22,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 134 transitions. [2024-06-20 15:54:22,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3435897435897436 [2024-06-20 15:54:22,013 INFO L175 Difference]: Start difference. First operand has 130 places, 73 transitions, 493 flow. Second operand 13 states and 134 transitions. [2024-06-20 15:54:22,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 97 transitions, 754 flow [2024-06-20 15:54:22,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 97 transitions, 712 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-20 15:54:22,033 INFO L231 Difference]: Finished difference. Result has 128 places, 68 transitions, 440 flow [2024-06-20 15:54:22,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=451, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=440, PETRI_PLACES=128, PETRI_TRANSITIONS=68} [2024-06-20 15:54:22,033 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 99 predicate places. [2024-06-20 15:54:22,033 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 68 transitions, 440 flow [2024-06-20 15:54:22,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:22,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:22,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:22,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-20 15:54:22,034 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:22,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:22,034 INFO L85 PathProgramCache]: Analyzing trace with hash 278050135, now seen corresponding path program 35 times [2024-06-20 15:54:22,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:22,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689511979] [2024-06-20 15:54:22,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:22,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:22,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:22,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689511979] [2024-06-20 15:54:22,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689511979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:22,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:22,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:22,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990083480] [2024-06-20 15:54:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:22,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:22,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:22,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:23,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:23,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 68 transitions, 440 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:23,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:23,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:23,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:23,332 INFO L124 PetriNetUnfolderBase]: 174/376 cut-off events. [2024-06-20 15:54:23,333 INFO L125 PetriNetUnfolderBase]: For 11190/11190 co-relation queries the response was YES. [2024-06-20 15:54:23,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1630 conditions, 376 events. 174/376 cut-off events. For 11190/11190 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1596 event pairs, 47 based on Foata normal form. 8/382 useless extension candidates. Maximal degree in co-relation 1575. Up to 291 conditions per place. [2024-06-20 15:54:23,334 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 59 selfloop transitions, 12 changer transitions 16/89 dead transitions. [2024-06-20 15:54:23,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 89 transitions, 676 flow [2024-06-20 15:54:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-20 15:54:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-20 15:54:23,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 132 transitions. [2024-06-20 15:54:23,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3384615384615385 [2024-06-20 15:54:23,335 INFO L175 Difference]: Start difference. First operand has 128 places, 68 transitions, 440 flow. Second operand 13 states and 132 transitions. [2024-06-20 15:54:23,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 89 transitions, 676 flow [2024-06-20 15:54:23,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 89 transitions, 626 flow, removed 4 selfloop flow, removed 15 redundant places. [2024-06-20 15:54:23,345 INFO L231 Difference]: Finished difference. Result has 116 places, 63 transitions, 389 flow [2024-06-20 15:54:23,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=390, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=389, PETRI_PLACES=116, PETRI_TRANSITIONS=63} [2024-06-20 15:54:23,346 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 87 predicate places. [2024-06-20 15:54:23,346 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 63 transitions, 389 flow [2024-06-20 15:54:23,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:23,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:23,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:23,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-20 15:54:23,346 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:23,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:23,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1329471051, now seen corresponding path program 36 times [2024-06-20 15:54:23,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:23,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279690688] [2024-06-20 15:54:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:23,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:23,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:24,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:24,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279690688] [2024-06-20 15:54:24,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279690688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:24,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:24,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:24,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589089607] [2024-06-20 15:54:24,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:24,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:24,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:24,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:24,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:24,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:24,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 63 transitions, 389 flow. Second operand has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:24,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:24,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:24,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:24,632 INFO L124 PetriNetUnfolderBase]: 139/304 cut-off events. [2024-06-20 15:54:24,632 INFO L125 PetriNetUnfolderBase]: For 7114/7114 co-relation queries the response was YES. [2024-06-20 15:54:24,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1124 conditions, 304 events. 139/304 cut-off events. For 7114/7114 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1208 event pairs, 27 based on Foata normal form. 8/310 useless extension candidates. Maximal degree in co-relation 1074. Up to 227 conditions per place. [2024-06-20 15:54:24,633 INFO L140 encePairwiseOnDemand]: 19/30 looper letters, 52 selfloop transitions, 8 changer transitions 19/81 dead transitions. [2024-06-20 15:54:24,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 81 transitions, 591 flow [2024-06-20 15:54:24,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-20 15:54:24,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-20 15:54:24,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 121 transitions. [2024-06-20 15:54:24,634 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33611111111111114 [2024-06-20 15:54:24,634 INFO L175 Difference]: Start difference. First operand has 116 places, 63 transitions, 389 flow. Second operand 12 states and 121 transitions. [2024-06-20 15:54:24,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 81 transitions, 591 flow [2024-06-20 15:54:24,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 81 transitions, 555 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-06-20 15:54:24,641 INFO L231 Difference]: Finished difference. Result has 109 places, 56 transitions, 332 flow [2024-06-20 15:54:24,641 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=353, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=332, PETRI_PLACES=109, PETRI_TRANSITIONS=56} [2024-06-20 15:54:24,642 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 80 predicate places. [2024-06-20 15:54:24,642 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 56 transitions, 332 flow [2024-06-20 15:54:24,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.25) internal successors, (87), 12 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:24,642 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:24,642 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:24,642 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-20 15:54:24,642 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:24,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:24,642 INFO L85 PathProgramCache]: Analyzing trace with hash -386030760, now seen corresponding path program 1 times [2024-06-20 15:54:24,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:24,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806467726] [2024-06-20 15:54:24,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:24,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:24,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:25,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:25,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:25,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806467726] [2024-06-20 15:54:25,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806467726] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:25,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:25,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:25,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201605799] [2024-06-20 15:54:25,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:25,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:25,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:25,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:25,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:25,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:25,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 56 transitions, 332 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:25,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:25,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:25,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:26,018 INFO L124 PetriNetUnfolderBase]: 121/267 cut-off events. [2024-06-20 15:54:26,018 INFO L125 PetriNetUnfolderBase]: For 5387/5387 co-relation queries the response was YES. [2024-06-20 15:54:26,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 971 conditions, 267 events. 121/267 cut-off events. For 5387/5387 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 1026 event pairs, 27 based on Foata normal form. 6/271 useless extension candidates. Maximal degree in co-relation 923. Up to 159 conditions per place. [2024-06-20 15:54:26,020 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 45 selfloop transitions, 15 changer transitions 12/74 dead transitions. [2024-06-20 15:54:26,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 74 transitions, 526 flow [2024-06-20 15:54:26,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:26,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:26,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-20 15:54:26,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575757575757576 [2024-06-20 15:54:26,021 INFO L175 Difference]: Start difference. First operand has 109 places, 56 transitions, 332 flow. Second operand 11 states and 118 transitions. [2024-06-20 15:54:26,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 74 transitions, 526 flow [2024-06-20 15:54:26,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 74 transitions, 481 flow, removed 7 selfloop flow, removed 12 redundant places. [2024-06-20 15:54:26,026 INFO L231 Difference]: Finished difference. Result has 95 places, 52 transitions, 305 flow [2024-06-20 15:54:26,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=289, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=305, PETRI_PLACES=95, PETRI_TRANSITIONS=52} [2024-06-20 15:54:26,026 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 66 predicate places. [2024-06-20 15:54:26,026 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 52 transitions, 305 flow [2024-06-20 15:54:26,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:26,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:26,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:26,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-20 15:54:26,027 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:26,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:26,027 INFO L85 PathProgramCache]: Analyzing trace with hash -233651114, now seen corresponding path program 2 times [2024-06-20 15:54:26,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:26,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305188958] [2024-06-20 15:54:26,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:26,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:27,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:27,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305188958] [2024-06-20 15:54:27,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305188958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:27,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:27,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:54:27,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532106623] [2024-06-20 15:54:27,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:27,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:54:27,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:27,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:54:27,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:54:27,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:27,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 52 transitions, 305 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-20 15:54:27,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:27,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:27,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:27,730 INFO L124 PetriNetUnfolderBase]: 112/248 cut-off events. [2024-06-20 15:54:27,730 INFO L125 PetriNetUnfolderBase]: For 4150/4150 co-relation queries the response was YES. [2024-06-20 15:54:27,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 876 conditions, 248 events. 112/248 cut-off events. For 4150/4150 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 914 event pairs, 27 based on Foata normal form. 6/252 useless extension candidates. Maximal degree in co-relation 834. Up to 149 conditions per place. [2024-06-20 15:54:27,731 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 42 selfloop transitions, 14 changer transitions 11/69 dead transitions. [2024-06-20 15:54:27,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 69 transitions, 483 flow [2024-06-20 15:54:27,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:27,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:27,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 115 transitions. [2024-06-20 15:54:27,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3484848484848485 [2024-06-20 15:54:27,732 INFO L175 Difference]: Start difference. First operand has 95 places, 52 transitions, 305 flow. Second operand 11 states and 115 transitions. [2024-06-20 15:54:27,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 69 transitions, 483 flow [2024-06-20 15:54:27,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 69 transitions, 449 flow, removed 2 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:27,736 INFO L231 Difference]: Finished difference. Result has 91 places, 49 transitions, 288 flow [2024-06-20 15:54:27,736 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=271, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=288, PETRI_PLACES=91, PETRI_TRANSITIONS=49} [2024-06-20 15:54:27,736 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 62 predicate places. [2024-06-20 15:54:27,736 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 49 transitions, 288 flow [2024-06-20 15:54:27,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-20 15:54:27,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:27,737 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:27,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-20 15:54:27,737 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:27,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:27,737 INFO L85 PathProgramCache]: Analyzing trace with hash -184682040, now seen corresponding path program 3 times [2024-06-20 15:54:27,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:27,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948134035] [2024-06-20 15:54:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:27,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:29,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:29,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948134035] [2024-06-20 15:54:29,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948134035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:29,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:29,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:54:29,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377641491] [2024-06-20 15:54:29,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:29,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:54:29,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:29,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:54:29,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:54:29,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:29,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 49 transitions, 288 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-20 15:54:29,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:29,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:29,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:29,484 INFO L124 PetriNetUnfolderBase]: 102/230 cut-off events. [2024-06-20 15:54:29,484 INFO L125 PetriNetUnfolderBase]: For 3834/3834 co-relation queries the response was YES. [2024-06-20 15:54:29,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 815 conditions, 230 events. 102/230 cut-off events. For 3834/3834 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 812 event pairs, 25 based on Foata normal form. 6/234 useless extension candidates. Maximal degree in co-relation 774. Up to 131 conditions per place. [2024-06-20 15:54:29,485 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 33 selfloop transitions, 7 changer transitions 24/66 dead transitions. [2024-06-20 15:54:29,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 66 transitions, 458 flow [2024-06-20 15:54:29,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:29,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-20 15:54:29,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34545454545454546 [2024-06-20 15:54:29,486 INFO L175 Difference]: Start difference. First operand has 91 places, 49 transitions, 288 flow. Second operand 11 states and 114 transitions. [2024-06-20 15:54:29,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 66 transitions, 458 flow [2024-06-20 15:54:29,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 66 transitions, 424 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:29,490 INFO L231 Difference]: Finished difference. Result has 87 places, 39 transitions, 224 flow [2024-06-20 15:54:29,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=224, PETRI_PLACES=87, PETRI_TRANSITIONS=39} [2024-06-20 15:54:29,491 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 58 predicate places. [2024-06-20 15:54:29,491 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 39 transitions, 224 flow [2024-06-20 15:54:29,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-20 15:54:29,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:29,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:29,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-20 15:54:29,491 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:29,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:29,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1212114292, now seen corresponding path program 4 times [2024-06-20 15:54:29,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:29,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738839382] [2024-06-20 15:54:29,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:29,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:30,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:30,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738839382] [2024-06-20 15:54:30,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738839382] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:30,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:30,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:54:30,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045687361] [2024-06-20 15:54:30,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:30,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:54:30,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:30,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:54:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:54:30,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:30,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 39 transitions, 224 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-20 15:54:30,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:30,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:30,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:31,012 INFO L124 PetriNetUnfolderBase]: 83/186 cut-off events. [2024-06-20 15:54:31,012 INFO L125 PetriNetUnfolderBase]: For 3208/3208 co-relation queries the response was YES. [2024-06-20 15:54:31,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 186 events. 83/186 cut-off events. For 3208/3208 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 607 event pairs, 21 based on Foata normal form. 6/191 useless extension candidates. Maximal degree in co-relation 625. Up to 125 conditions per place. [2024-06-20 15:54:31,013 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 29 selfloop transitions, 6 changer transitions 16/53 dead transitions. [2024-06-20 15:54:31,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 53 transitions, 358 flow [2024-06-20 15:54:31,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:31,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:31,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-20 15:54:31,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2024-06-20 15:54:31,013 INFO L175 Difference]: Start difference. First operand has 87 places, 39 transitions, 224 flow. Second operand 11 states and 108 transitions. [2024-06-20 15:54:31,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 53 transitions, 358 flow [2024-06-20 15:54:31,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 53 transitions, 328 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-20 15:54:31,016 INFO L231 Difference]: Finished difference. Result has 72 places, 34 transitions, 184 flow [2024-06-20 15:54:31,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=184, PETRI_PLACES=72, PETRI_TRANSITIONS=34} [2024-06-20 15:54:31,016 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 43 predicate places. [2024-06-20 15:54:31,016 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 34 transitions, 184 flow [2024-06-20 15:54:31,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-20 15:54:31,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:31,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:31,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-20 15:54:31,017 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:31,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:31,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1862092344, now seen corresponding path program 5 times [2024-06-20 15:54:31,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:31,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458461945] [2024-06-20 15:54:31,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:31,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:31,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:31,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:31,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:31,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458461945] [2024-06-20 15:54:31,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458461945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:31,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:31,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-20 15:54:31,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775300700] [2024-06-20 15:54:31,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:31,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-20 15:54:31,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:31,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-20 15:54:31,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-20 15:54:32,056 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:32,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 34 transitions, 184 flow. Second operand has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:32,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:32,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:32,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:32,297 INFO L124 PetriNetUnfolderBase]: 70/159 cut-off events. [2024-06-20 15:54:32,298 INFO L125 PetriNetUnfolderBase]: For 1958/1958 co-relation queries the response was YES. [2024-06-20 15:54:32,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549 conditions, 159 events. 70/159 cut-off events. For 1958/1958 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 470 event pairs, 17 based on Foata normal form. 6/164 useless extension candidates. Maximal degree in co-relation 516. Up to 93 conditions per place. [2024-06-20 15:54:32,298 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 24 selfloop transitions, 8 changer transitions 14/48 dead transitions. [2024-06-20 15:54:32,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 48 transitions, 306 flow [2024-06-20 15:54:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:32,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 108 transitions. [2024-06-20 15:54:32,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.32727272727272727 [2024-06-20 15:54:32,300 INFO L175 Difference]: Start difference. First operand has 72 places, 34 transitions, 184 flow. Second operand 11 states and 108 transitions. [2024-06-20 15:54:32,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 48 transitions, 306 flow [2024-06-20 15:54:32,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 48 transitions, 286 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-20 15:54:32,302 INFO L231 Difference]: Finished difference. Result has 65 places, 30 transitions, 164 flow [2024-06-20 15:54:32,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=164, PETRI_PLACES=65, PETRI_TRANSITIONS=30} [2024-06-20 15:54:32,303 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 36 predicate places. [2024-06-20 15:54:32,303 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 30 transitions, 164 flow [2024-06-20 15:54:32,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 7.333333333333333) internal successors, (88), 12 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-20 15:54:32,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:32,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:32,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-20 15:54:32,304 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:32,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:32,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1127295432, now seen corresponding path program 6 times [2024-06-20 15:54:32,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:32,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839953679] [2024-06-20 15:54:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:32,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:33,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:33,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:33,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839953679] [2024-06-20 15:54:33,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839953679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:33,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:33,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:54:33,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807282161] [2024-06-20 15:54:33,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:33,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:54:33,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:33,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:54:33,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:54:34,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:34,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 30 transitions, 164 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-20 15:54:34,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:34,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:34,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:34,262 INFO L124 PetriNetUnfolderBase]: 56/133 cut-off events. [2024-06-20 15:54:34,262 INFO L125 PetriNetUnfolderBase]: For 1366/1366 co-relation queries the response was YES. [2024-06-20 15:54:34,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 464 conditions, 133 events. 56/133 cut-off events. For 1366/1366 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 357 event pairs, 15 based on Foata normal form. 6/138 useless extension candidates. Maximal degree in co-relation 434. Up to 69 conditions per place. [2024-06-20 15:54:34,262 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 20 selfloop transitions, 4 changer transitions 18/44 dead transitions. [2024-06-20 15:54:34,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 44 transitions, 280 flow [2024-06-20 15:54:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:34,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:34,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 106 transitions. [2024-06-20 15:54:34,263 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3212121212121212 [2024-06-20 15:54:34,263 INFO L175 Difference]: Start difference. First operand has 65 places, 30 transitions, 164 flow. Second operand 11 states and 106 transitions. [2024-06-20 15:54:34,263 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 44 transitions, 280 flow [2024-06-20 15:54:34,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 44 transitions, 256 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-20 15:54:34,265 INFO L231 Difference]: Finished difference. Result has 59 places, 24 transitions, 125 flow [2024-06-20 15:54:34,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=125, PETRI_PLACES=59, PETRI_TRANSITIONS=24} [2024-06-20 15:54:34,265 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 30 predicate places. [2024-06-20 15:54:34,265 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 24 transitions, 125 flow [2024-06-20 15:54:34,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-20 15:54:34,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-20 15:54:34,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:34,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-20 15:54:34,266 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-20 15:54:34,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-20 15:54:34,266 INFO L85 PathProgramCache]: Analyzing trace with hash -622132824, now seen corresponding path program 7 times [2024-06-20 15:54:34,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-20 15:54:34,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682903240] [2024-06-20 15:54:34,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-20 15:54:34,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-20 15:54:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-20 15:54:35,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-20 15:54:35,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-20 15:54:35,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682903240] [2024-06-20 15:54:35,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682903240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-20 15:54:35,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-20 15:54:35,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-20 15:54:35,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105814568] [2024-06-20 15:54:35,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-20 15:54:35,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-20 15:54:35,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-20 15:54:35,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-20 15:54:35,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-20 15:54:35,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 30 [2024-06-20 15:54:35,635 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 24 transitions, 125 flow. Second operand has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-20 15:54:35,635 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-20 15:54:35,635 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 30 [2024-06-20 15:54:35,635 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-20 15:54:35,849 INFO L124 PetriNetUnfolderBase]: 27/70 cut-off events. [2024-06-20 15:54:35,849 INFO L125 PetriNetUnfolderBase]: For 454/454 co-relation queries the response was YES. [2024-06-20 15:54:35,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 211 conditions, 70 events. 27/70 cut-off events. For 454/454 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 109 event pairs, 0 based on Foata normal form. 6/75 useless extension candidates. Maximal degree in co-relation 194. Up to 24 conditions per place. [2024-06-20 15:54:35,850 INFO L140 encePairwiseOnDemand]: 20/30 looper letters, 0 selfloop transitions, 0 changer transitions 32/32 dead transitions. [2024-06-20 15:54:35,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 32 transitions, 177 flow [2024-06-20 15:54:35,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-20 15:54:35,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-20 15:54:35,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 95 transitions. [2024-06-20 15:54:35,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.2878787878787879 [2024-06-20 15:54:35,850 INFO L175 Difference]: Start difference. First operand has 59 places, 24 transitions, 125 flow. Second operand 11 states and 95 transitions. [2024-06-20 15:54:35,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 32 transitions, 177 flow [2024-06-20 15:54:35,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 32 transitions, 151 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-20 15:54:35,851 INFO L231 Difference]: Finished difference. Result has 46 places, 0 transitions, 0 flow [2024-06-20 15:54:35,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=0, PETRI_PLACES=46, PETRI_TRANSITIONS=0} [2024-06-20 15:54:35,851 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 17 predicate places. [2024-06-20 15:54:35,851 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 0 transitions, 0 flow [2024-06-20 15:54:35,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.230769230769231) internal successors, (94), 13 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) [2024-06-20 15:54:35,857 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (3 of 4 remaining) [2024-06-20 15:54:35,857 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (2 of 4 remaining) [2024-06-20 15:54:35,861 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2024-06-20 15:54:35,861 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2024-06-20 15:54:35,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-20 15:54:35,862 INFO L445 BasicCegarLoop]: Path program histogram: [36, 13, 11, 8, 8, 7, 6, 5, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-20 15:54:35,865 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2024-06-20 15:54:35,865 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2024-06-20 15:54:35,868 INFO L507 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-06-20 15:54:35,868 INFO L508 ceAbstractionStarter]: WitnessConsidered=2 [2024-06-20 15:54:35,869 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.06 03:54:35 BasicIcfg [2024-06-20 15:54:35,869 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-06-20 15:54:35,870 INFO L158 Benchmark]: Toolchain (without parser) took 162908.54ms. Allocated memory was 163.6MB in the beginning and 740.3MB in the end (delta: 576.7MB). Free memory was 127.7MB in the beginning and 596.1MB in the end (delta: -468.4MB). Peak memory consumption was 109.4MB. Max. memory is 16.1GB. [2024-06-20 15:54:35,870 INFO L158 Benchmark]: Witness Parser took 0.19ms. Allocated memory is still 163.6MB. Free memory is still 127.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:54:35,870 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 163.6MB. Free memory is still 121.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-06-20 15:54:35,870 INFO L158 Benchmark]: CACSL2BoogieTranslator took 661.08ms. Allocated memory is still 163.6MB. Free memory was 126.9MB in the beginning and 94.6MB in the end (delta: 32.3MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. [2024-06-20 15:54:35,870 INFO L158 Benchmark]: Boogie Procedure Inliner took 65.94ms. Allocated memory is still 163.6MB. Free memory was 94.1MB in the beginning and 91.2MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-06-20 15:54:35,871 INFO L158 Benchmark]: Boogie Preprocessor took 41.81ms. Allocated memory is still 163.6MB. Free memory was 91.2MB in the beginning and 88.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-06-20 15:54:35,871 INFO L158 Benchmark]: RCFGBuilder took 689.42ms. Allocated memory is still 163.6MB. Free memory was 88.3MB in the beginning and 81.0MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-06-20 15:54:35,871 INFO L158 Benchmark]: TraceAbstraction took 161444.02ms. Allocated memory was 163.6MB in the beginning and 740.3MB in the end (delta: 576.7MB). Free memory was 81.0MB in the beginning and 596.1MB in the end (delta: -515.1MB). Peak memory consumption was 63.7MB. Max. memory is 16.1GB. [2024-06-20 15:54:35,872 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.19ms. Allocated memory is still 163.6MB. Free memory is still 127.6MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.18ms. Allocated memory is still 163.6MB. Free memory is still 121.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 661.08ms. Allocated memory is still 163.6MB. Free memory was 126.9MB in the beginning and 94.6MB in the end (delta: 32.3MB). Peak memory consumption was 31.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 65.94ms. Allocated memory is still 163.6MB. Free memory was 94.1MB in the beginning and 91.2MB in the end (delta: 2.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 41.81ms. Allocated memory is still 163.6MB. Free memory was 91.2MB in the beginning and 88.3MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 689.42ms. Allocated memory is still 163.6MB. Free memory was 88.3MB in the beginning and 81.0MB in the end (delta: 7.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 161444.02ms. Allocated memory was 163.6MB in the beginning and 740.3MB in the end (delta: 576.7MB). Free memory was 81.0MB in the beginning and 596.1MB in the end (delta: -515.1MB). Peak memory consumption was 63.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 815]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 816]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 48 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 161.3s, OverallIterations: 118, TraceHistogramMax: 1, PathProgramHistogramMax: 36, EmptinessCheckTime: 0.0s, AutomataDifference: 52.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 7817 SdHoareTripleChecker+Valid, 29.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6648 mSDsluCounter, 3778 SdHoareTripleChecker+Invalid, 25.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3371 mSDsCounter, 1716 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 47510 IncrementalHoareTripleChecker+Invalid, 49226 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1716 mSolverCounterUnsat, 407 mSDtfsCounter, 47510 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1334 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2769 ImplicationChecksByTransitivity, 39.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1457occurred in iteration=59, InterpolantAutomatonStates: 1170, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 106.7s InterpolantComputationTime, 1841 NumberOfCodeBlocks, 1841 NumberOfCodeBlocksAsserted, 118 NumberOfCheckSat, 1723 ConstructedInterpolants, 0 QuantifiedInterpolants, 77136 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 118 InterpolantComputations, 118 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 2 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-06-20 15:54:35,912 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE