./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/rfi008.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi008.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f 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/rfi008.oepc.i ./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi008.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-eb4cb34-m [2024-06-21 19:14:20,538 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 19:14:20,609 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 19:14:20,620 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 19:14:20,621 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 19:14:20,644 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 19:14:20,644 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 19:14:20,644 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 19:14:20,645 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 19:14:20,648 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 19:14:20,648 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 19:14:20,648 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 19:14:20,649 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 19:14:20,650 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 19:14:20,650 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 19:14:20,650 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 19:14:20,651 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 19:14:20,651 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 19:14:20,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 19:14:20,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 19:14:20,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 19:14:20,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 19:14:20,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 19:14:20,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 19:14:20,652 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 19:14:20,652 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 19:14:20,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 19:14:20,653 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 19:14:20,653 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 19:14:20,654 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 19:14:20,654 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 19:14:20,654 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 19:14:20,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:14:20,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 19:14:20,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 19:14:20,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 19:14:20,655 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 19:14:20,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 19:14:20,656 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 19:14:20,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 19:14:20,656 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 19:14:20,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 19:14:20,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 19:14:20,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 19:14:20,888 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 19:14:20,907 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 19:14:20,909 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 19:14:20,910 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 19:14:20,911 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 19:14:20,911 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/rfi008.oepc.i [2024-06-21 19:14:21,990 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 19:14:22,223 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 19:14:22,226 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/rfi008.oepc.i [2024-06-21 19:14:22,241 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ced18fdd6/1c99e65aba4e4363b88dc12fca9d11a6/FLAG449877ad2 [2024-06-21 19:14:22,254 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ced18fdd6/1c99e65aba4e4363b88dc12fca9d11a6 [2024-06-21 19:14:22,256 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 19:14:22,257 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 19:14:22,257 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/mutex-meet-rel/rfi008.oepc.yml/witness.yml [2024-06-21 19:14:22,322 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 19:14:22,324 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 19:14:22,325 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 19:14:22,325 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 19:14:22,328 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 19:14:22,329 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:14:22" (1/2) ... [2024-06-21 19:14:22,330 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61535d85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:14:22, skipping insertion in model container [2024-06-21 19:14:22,330 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 07:14:22" (1/2) ... [2024-06-21 19:14:22,331 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4a401347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 07:14:22, skipping insertion in model container [2024-06-21 19:14:22,332 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:14:22" (2/2) ... [2024-06-21 19:14:22,333 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61535d85 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22, skipping insertion in model container [2024-06-21 19:14:22,334 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:14:22" (2/2) ... [2024-06-21 19:14:22,334 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 19:14:22,357 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 19:14:22,358 INFO L97 edCorrectnessWitness]: Location invariant before [L834-L834] ! multithreaded || (((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )x$flush_delayed) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd0) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd1) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd0) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff1 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$read_delayed) + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )x$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )x$w_buff0 >= 0LL) && (long long )x + (long long )x$w_buff0 >= 0LL) && (long long )x$flush_delayed + (long long )x$w_buff0 >= 0LL) && (long long )x$mem_tmp + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd0 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd0 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd1 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd2 + (long long )x$w_buff0 >= 0LL) && (long long )x$read_delayed + (long long )x$w_buff0 >= 0LL) && (long long )x$w_buff0 + (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 + (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 + (long long )y >= 0LL) && (long long )weak$$choice0 + (long long )x$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )x$w_buff0 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:14:22,358 INFO L97 edCorrectnessWitness]: Location invariant before [L835-L835] ! multithreaded || (((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p0_EBX) + (long long )y >= 0LL && (0LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (0LL - (long long )x$flush_delayed) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd0) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd1) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff0_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd0) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$r_buff1_thd1) + (long long )x$w_buff1 >= 0LL) && (0LL - (long long )x$r_buff1_thd2) + (long long )x$w_buff0 >= 0LL) && (0LL - (long long )x$read_delayed) + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_cnt + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EAX + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p0_EBX + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x$w_buff0 >= 0LL) && (long long )__unbuffered_p1_EBX + (long long )x$w_buff0 >= 0LL) && (long long )main$tmp_guard1 + (long long )x$w_buff0 >= 0LL) && (long long )x + (long long )x$w_buff0 >= 0LL) && (long long )x$flush_delayed + (long long )x$w_buff0 >= 0LL) && (long long )x$mem_tmp + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd0 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff0_thd2 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd0 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd1 + (long long )x$w_buff0 >= 0LL) && (long long )x$r_buff1_thd2 + (long long )x$w_buff0 >= 0LL) && (long long )x$read_delayed + (long long )x$w_buff0 >= 0LL) && (long long )x$w_buff0 + (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 + (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff0 + (long long )y >= 0LL) && (long long )weak$$choice0 + (long long )x$w_buff0 >= 0LL) && (long long )weak$$choice2 + (long long )x$w_buff0 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff0_used >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1 >= 0LL) && (long long )x$w_buff0 - (long long )x$w_buff1_used >= 0LL) && (long long )x$w_buff1 - (long long )x$w_buff1_used >= 0LL) [2024-06-21 19:14:22,358 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 19:14:22,358 INFO L106 edCorrectnessWitness]: ghost_update [L832-L832] multithreaded = 1; [2024-06-21 19:14:22,395 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 19:14:22,668 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:14:22,679 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 19:14:22,827 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 19:14:22,867 INFO L206 MainTranslator]: Completed translation [2024-06-21 19:14:22,868 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22 WrapperNode [2024-06-21 19:14:22,868 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 19:14:22,869 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 19:14:22,870 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 19:14:22,870 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 19:14:22,875 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,904 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,929 INFO L138 Inliner]: procedures = 174, calls = 38, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 137 [2024-06-21 19:14:22,929 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 19:14:22,930 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 19:14:22,930 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 19:14:22,930 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 19:14:22,938 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,939 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,941 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,960 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]. [2024-06-21 19:14:22,961 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,961 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,975 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,976 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,978 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,979 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,982 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 19:14:22,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 19:14:22,983 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 19:14:22,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 19:14:22,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (1/1) ... [2024-06-21 19:14:22,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 19:14:22,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 19:14:23,017 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) [2024-06-21 19:14:23,076 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 [2024-06-21 19:14:23,118 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 19:14:23,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 19:14:23,118 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 19:14:23,119 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 19:14:23,119 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 19:14:23,128 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 19:14:23,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 19:14:23,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 19:14:23,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 19:14:23,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 19:14:23,130 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 19:14:23,235 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 19:14:23,237 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 19:14:23,612 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 19:14:23,612 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 19:14:23,751 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 19:14:23,751 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 19:14:23,753 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:14:23 BoogieIcfgContainer [2024-06-21 19:14:23,753 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 19:14:23,755 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 19:14:23,755 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 19:14:23,757 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 19:14:23,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 07:14:22" (1/4) ... [2024-06-21 19:14:23,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5725196f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 07:14:23, skipping insertion in model container [2024-06-21 19:14:23,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 07:14:22" (2/4) ... [2024-06-21 19:14:23,758 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5725196f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:14:23, skipping insertion in model container [2024-06-21 19:14:23,758 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 07:14:22" (3/4) ... [2024-06-21 19:14:23,761 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5725196f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 07:14:23, skipping insertion in model container [2024-06-21 19:14:23,761 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 07:14:23" (4/4) ... [2024-06-21 19:14:23,762 INFO L112 eAbstractionObserver]: Analyzing ICFG rfi008.oepc.i [2024-06-21 19:14:23,774 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 19:14:23,774 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2024-06-21 19:14:23,774 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 19:14:23,810 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 19:14:23,839 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 19:14:23,861 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2024-06-21 19:14:23,861 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:14:23,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36 conditions, 29 events. 0/29 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 43 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 19:14:23,862 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 70 flow [2024-06-21 19:14:23,866 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 30 places, 23 transitions, 52 flow [2024-06-21 19:14:23,878 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 19:14:23,912 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;@1481c8a3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 19:14:23,913 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2024-06-21 19:14:23,916 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 19:14:23,916 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-21 19:14:23,916 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 19:14:23,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:23,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 19:14:23,917 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)] === [2024-06-21 19:14:23,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:23,921 INFO L85 PathProgramCache]: Analyzing trace with hash 368677949, now seen corresponding path program 1 times [2024-06-21 19:14:23,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:23,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108327897] [2024-06-21 19:14:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:23,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:24,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:24,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108327897] [2024-06-21 19:14:24,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108327897] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:24,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:24,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 19:14:24,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470653407] [2024-06-21 19:14:24,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:25,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 19:14:25,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:25,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 19:14:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 19:14:25,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 19:14:25,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 23 transitions, 52 flow. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:25,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:25,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 19:14:25,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:25,204 INFO L124 PetriNetUnfolderBase]: 193/350 cut-off events. [2024-06-21 19:14:25,205 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-06-21 19:14:25,207 INFO L83 FinitePrefix]: Finished finitePrefix Result has 716 conditions, 350 events. 193/350 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1270 event pairs, 119 based on Foata normal form. 1/343 useless extension candidates. Maximal degree in co-relation 705. Up to 341 conditions per place. [2024-06-21 19:14:25,209 INFO L140 encePairwiseOnDemand]: 26/31 looper letters, 22 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-06-21 19:14:25,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 29 transitions, 117 flow [2024-06-21 19:14:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 19:14:25,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 19:14:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 54 transitions. [2024-06-21 19:14:25,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5806451612903226 [2024-06-21 19:14:25,218 INFO L175 Difference]: Start difference. First operand has 30 places, 23 transitions, 52 flow. Second operand 3 states and 54 transitions. [2024-06-21 19:14:25,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 29 transitions, 117 flow [2024-06-21 19:14:25,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 30 places, 29 transitions, 114 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-06-21 19:14:25,222 INFO L231 Difference]: Finished difference. Result has 31 places, 25 transitions, 71 flow [2024-06-21 19:14:25,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=31, PETRI_TRANSITIONS=25} [2024-06-21 19:14:25,225 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 1 predicate places. [2024-06-21 19:14:25,225 INFO L495 AbstractCegarLoop]: Abstraction has has 31 places, 25 transitions, 71 flow [2024-06-21 19:14:25,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:25,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:25,226 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:25,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 19:14:25,226 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)] === [2024-06-21 19:14:25,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:25,227 INFO L85 PathProgramCache]: Analyzing trace with hash 2112218588, now seen corresponding path program 1 times [2024-06-21 19:14:25,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:25,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492030045] [2024-06-21 19:14:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:25,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:25,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:25,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:25,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492030045] [2024-06-21 19:14:25,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492030045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:25,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:25,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 19:14:25,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514267972] [2024-06-21 19:14:25,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:25,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 19:14:25,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:25,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 19:14:25,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-21 19:14:25,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 19:14:25,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 25 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:25,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:25,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 19:14:25,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:25,858 INFO L124 PetriNetUnfolderBase]: 190/345 cut-off events. [2024-06-21 19:14:25,858 INFO L125 PetriNetUnfolderBase]: For 68/71 co-relation queries the response was YES. [2024-06-21 19:14:25,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 345 events. 190/345 cut-off events. For 68/71 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1213 event pairs, 101 based on Foata normal form. 4/347 useless extension candidates. Maximal degree in co-relation 786. Up to 327 conditions per place. [2024-06-21 19:14:25,863 INFO L140 encePairwiseOnDemand]: 25/31 looper letters, 26 selfloop transitions, 5 changer transitions 0/35 dead transitions. [2024-06-21 19:14:25,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 35 transitions, 159 flow [2024-06-21 19:14:25,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 19:14:25,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 19:14:25,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 69 transitions. [2024-06-21 19:14:25,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564516129032258 [2024-06-21 19:14:25,866 INFO L175 Difference]: Start difference. First operand has 31 places, 25 transitions, 71 flow. Second operand 4 states and 69 transitions. [2024-06-21 19:14:25,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 35 transitions, 159 flow [2024-06-21 19:14:25,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 35 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 19:14:25,870 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 95 flow [2024-06-21 19:14:25,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=68, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2024-06-21 19:14:25,871 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 4 predicate places. [2024-06-21 19:14:25,871 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 95 flow [2024-06-21 19:14:25,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:25,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:25,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:25,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 19:14:25,873 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)] === [2024-06-21 19:14:25,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:25,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1054267720, now seen corresponding path program 1 times [2024-06-21 19:14:25,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:25,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375512648] [2024-06-21 19:14:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:25,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:25,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:26,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:26,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:26,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375512648] [2024-06-21 19:14:26,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375512648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:26,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:26,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 19:14:26,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87959073] [2024-06-21 19:14:26,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:26,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 19:14:26,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:26,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 19:14:26,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-06-21 19:14:26,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 31 [2024-06-21 19:14:26,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 95 flow. Second operand has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:26,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:26,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 31 [2024-06-21 19:14:26,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:26,989 INFO L124 PetriNetUnfolderBase]: 187/340 cut-off events. [2024-06-21 19:14:26,989 INFO L125 PetriNetUnfolderBase]: For 199/205 co-relation queries the response was YES. [2024-06-21 19:14:26,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 873 conditions, 340 events. 187/340 cut-off events. For 199/205 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1207 event pairs, 83 based on Foata normal form. 6/344 useless extension candidates. Maximal degree in co-relation 859. Up to 313 conditions per place. [2024-06-21 19:14:26,992 INFO L140 encePairwiseOnDemand]: 24/31 looper letters, 30 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2024-06-21 19:14:26,992 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 41 transitions, 207 flow [2024-06-21 19:14:26,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 19:14:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 19:14:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-21 19:14:26,993 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5419354838709678 [2024-06-21 19:14:26,993 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 95 flow. Second operand 5 states and 84 transitions. [2024-06-21 19:14:26,994 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 41 transitions, 207 flow [2024-06-21 19:14:26,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 41 transitions, 198 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-06-21 19:14:26,995 INFO L231 Difference]: Finished difference. Result has 37 places, 29 transitions, 119 flow [2024-06-21 19:14:26,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=119, PETRI_PLACES=37, PETRI_TRANSITIONS=29} [2024-06-21 19:14:26,996 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 7 predicate places. [2024-06-21 19:14:26,996 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 29 transitions, 119 flow [2024-06-21 19:14:26,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.2) internal successors, (51), 5 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:26,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:26,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:26,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 19:14:26,997 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)] === [2024-06-21 19:14:26,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:26,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1622026825, now seen corresponding path program 1 times [2024-06-21 19:14:26,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:26,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329745789] [2024-06-21 19:14:26,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:26,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:27,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:28,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:28,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:28,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329745789] [2024-06-21 19:14:28,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329745789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:28,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:28,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:28,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295318638] [2024-06-21 19:14:28,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:28,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:28,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:28,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:28,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:28,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 19:14:28,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 29 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:28,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:28,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 19:14:28,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:28,223 INFO L124 PetriNetUnfolderBase]: 213/383 cut-off events. [2024-06-21 19:14:28,223 INFO L125 PetriNetUnfolderBase]: For 384/384 co-relation queries the response was YES. [2024-06-21 19:14:28,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 383 events. 213/383 cut-off events. For 384/384 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1384 event pairs, 49 based on Foata normal form. 6/387 useless extension candidates. Maximal degree in co-relation 1059. Up to 309 conditions per place. [2024-06-21 19:14:28,242 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 41 selfloop transitions, 12 changer transitions 0/56 dead transitions. [2024-06-21 19:14:28,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 56 transitions, 305 flow [2024-06-21 19:14:28,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:28,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:28,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-21 19:14:28,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5483870967741935 [2024-06-21 19:14:28,244 INFO L175 Difference]: Start difference. First operand has 37 places, 29 transitions, 119 flow. Second operand 6 states and 102 transitions. [2024-06-21 19:14:28,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 56 transitions, 305 flow [2024-06-21 19:14:28,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 56 transitions, 290 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:28,248 INFO L231 Difference]: Finished difference. Result has 40 places, 34 transitions, 164 flow [2024-06-21 19:14:28,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=164, PETRI_PLACES=40, PETRI_TRANSITIONS=34} [2024-06-21 19:14:28,250 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 10 predicate places. [2024-06-21 19:14:28,250 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 34 transitions, 164 flow [2024-06-21 19:14:28,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:28,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:28,250 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:28,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 19:14:28,251 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:14:28,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:28,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1405231846, now seen corresponding path program 1 times [2024-06-21 19:14:28,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:28,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293917366] [2024-06-21 19:14:28,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:28,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:28,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:29,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:29,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:29,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293917366] [2024-06-21 19:14:29,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293917366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:29,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:29,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:29,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3256458] [2024-06-21 19:14:29,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:29,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:29,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:29,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:29,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:29,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 19:14:29,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 34 transitions, 164 flow. Second operand has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 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) [2024-06-21 19:14:29,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:29,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 19:14:29,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:30,222 INFO L124 PetriNetUnfolderBase]: 213/383 cut-off events. [2024-06-21 19:14:30,223 INFO L125 PetriNetUnfolderBase]: For 573/573 co-relation queries the response was YES. [2024-06-21 19:14:30,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191 conditions, 383 events. 213/383 cut-off events. For 573/573 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1368 event pairs, 29 based on Foata normal form. 6/387 useless extension candidates. Maximal degree in co-relation 1175. Up to 285 conditions per place. [2024-06-21 19:14:30,225 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 44 selfloop transitions, 17 changer transitions 0/64 dead transitions. [2024-06-21 19:14:30,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 64 transitions, 382 flow [2024-06-21 19:14:30,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:30,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:30,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-21 19:14:30,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5080645161290323 [2024-06-21 19:14:30,226 INFO L175 Difference]: Start difference. First operand has 40 places, 34 transitions, 164 flow. Second operand 8 states and 126 transitions. [2024-06-21 19:14:30,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 64 transitions, 382 flow [2024-06-21 19:14:30,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 64 transitions, 364 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-21 19:14:30,229 INFO L231 Difference]: Finished difference. Result has 46 places, 38 transitions, 217 flow [2024-06-21 19:14:30,229 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=217, PETRI_PLACES=46, PETRI_TRANSITIONS=38} [2024-06-21 19:14:30,229 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 16 predicate places. [2024-06-21 19:14:30,229 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 38 transitions, 217 flow [2024-06-21 19:14:30,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.125) internal successors, (73), 8 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) [2024-06-21 19:14:30,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:30,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:30,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 19:14:30,230 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)] === [2024-06-21 19:14:30,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:30,231 INFO L85 PathProgramCache]: Analyzing trace with hash 2037384641, now seen corresponding path program 1 times [2024-06-21 19:14:30,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:30,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640986119] [2024-06-21 19:14:30,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:30,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:30,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:30,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:30,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:30,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640986119] [2024-06-21 19:14:30,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640986119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:30,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:30,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 19:14:30,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34796914] [2024-06-21 19:14:30,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:30,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 19:14:30,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:30,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 19:14:30,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 19:14:30,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:30,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 38 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:30,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:30,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:30,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:31,233 INFO L124 PetriNetUnfolderBase]: 207/374 cut-off events. [2024-06-21 19:14:31,234 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2024-06-21 19:14:31,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1294 conditions, 374 events. 207/374 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1304 event pairs, 45 based on Foata normal form. 3/375 useless extension candidates. Maximal degree in co-relation 1274. Up to 354 conditions per place. [2024-06-21 19:14:31,236 INFO L140 encePairwiseOnDemand]: 23/31 looper letters, 39 selfloop transitions, 10 changer transitions 0/51 dead transitions. [2024-06-21 19:14:31,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 51 transitions, 361 flow [2024-06-21 19:14:31,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 19:14:31,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 19:14:31,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 72 transitions. [2024-06-21 19:14:31,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:14:31,238 INFO L175 Difference]: Start difference. First operand has 46 places, 38 transitions, 217 flow. Second operand 6 states and 72 transitions. [2024-06-21 19:14:31,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 51 transitions, 361 flow [2024-06-21 19:14:31,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 318 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:31,242 INFO L231 Difference]: Finished difference. Result has 49 places, 44 transitions, 245 flow [2024-06-21 19:14:31,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=245, PETRI_PLACES=49, PETRI_TRANSITIONS=44} [2024-06-21 19:14:31,244 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 19 predicate places. [2024-06-21 19:14:31,244 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 44 transitions, 245 flow [2024-06-21 19:14:31,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 7.666666666666667) internal successors, (46), 6 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:31,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:31,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:31,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 19:14:31,245 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)] === [2024-06-21 19:14:31,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:31,245 INFO L85 PathProgramCache]: Analyzing trace with hash 1502795314, now seen corresponding path program 1 times [2024-06-21 19:14:31,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:31,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694734028] [2024-06-21 19:14:31,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:31,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:32,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:32,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694734028] [2024-06-21 19:14:32,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694734028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:32,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:32,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:32,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543280782] [2024-06-21 19:14:32,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:32,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:32,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:32,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:32,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:32,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:32,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 44 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:32,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:32,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:32,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:32,409 INFO L124 PetriNetUnfolderBase]: 241/431 cut-off events. [2024-06-21 19:14:32,409 INFO L125 PetriNetUnfolderBase]: For 1010/1010 co-relation queries the response was YES. [2024-06-21 19:14:32,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1521 conditions, 431 events. 241/431 cut-off events. For 1010/1010 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1538 event pairs, 49 based on Foata normal form. 3/432 useless extension candidates. Maximal degree in co-relation 1496. Up to 380 conditions per place. [2024-06-21 19:14:32,412 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 49 selfloop transitions, 16 changer transitions 0/67 dead transitions. [2024-06-21 19:14:32,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 67 transitions, 472 flow [2024-06-21 19:14:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:32,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:32,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 89 transitions. [2024-06-21 19:14:32,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41013824884792627 [2024-06-21 19:14:32,414 INFO L175 Difference]: Start difference. First operand has 49 places, 44 transitions, 245 flow. Second operand 7 states and 89 transitions. [2024-06-21 19:14:32,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 67 transitions, 472 flow [2024-06-21 19:14:32,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 67 transitions, 456 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 19:14:32,417 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 349 flow [2024-06-21 19:14:32,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=349, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-21 19:14:32,418 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 27 predicate places. [2024-06-21 19:14:32,418 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 349 flow [2024-06-21 19:14:32,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:32,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:32,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:32,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 19:14:32,419 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)] === [2024-06-21 19:14:32,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:32,419 INFO L85 PathProgramCache]: Analyzing trace with hash -578692734, now seen corresponding path program 2 times [2024-06-21 19:14:32,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:32,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761279868] [2024-06-21 19:14:32,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:32,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:32,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:33,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:33,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761279868] [2024-06-21 19:14:33,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761279868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:33,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:33,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:33,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140972802] [2024-06-21 19:14:33,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:33,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:33,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:33,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:33,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:33,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:33,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 349 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:33,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:33,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:33,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:33,448 INFO L124 PetriNetUnfolderBase]: 260/462 cut-off events. [2024-06-21 19:14:33,448 INFO L125 PetriNetUnfolderBase]: For 1460/1460 co-relation queries the response was YES. [2024-06-21 19:14:33,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1825 conditions, 462 events. 260/462 cut-off events. For 1460/1460 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1676 event pairs, 47 based on Foata normal form. 3/463 useless extension candidates. Maximal degree in co-relation 1794. Up to 409 conditions per place. [2024-06-21 19:14:33,451 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 53 selfloop transitions, 18 changer transitions 0/73 dead transitions. [2024-06-21 19:14:33,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 73 transitions, 586 flow [2024-06-21 19:14:33,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:33,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 87 transitions. [2024-06-21 19:14:33,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4009216589861751 [2024-06-21 19:14:33,452 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 349 flow. Second operand 7 states and 87 transitions. [2024-06-21 19:14:33,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 73 transitions, 586 flow [2024-06-21 19:14:33,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 73 transitions, 577 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-21 19:14:33,459 INFO L231 Difference]: Finished difference. Result has 65 places, 62 transitions, 462 flow [2024-06-21 19:14:33,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=462, PETRI_PLACES=65, PETRI_TRANSITIONS=62} [2024-06-21 19:14:33,461 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 35 predicate places. [2024-06-21 19:14:33,461 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 62 transitions, 462 flow [2024-06-21 19:14:33,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:33,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:33,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:33,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 19:14:33,461 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)] === [2024-06-21 19:14:33,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:33,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1974654658, now seen corresponding path program 3 times [2024-06-21 19:14:33,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:33,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522400140] [2024-06-21 19:14:33,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:33,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:33,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:34,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:34,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:34,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522400140] [2024-06-21 19:14:34,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522400140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:34,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:34,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:34,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596070009] [2024-06-21 19:14:34,197 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:34,197 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:34,197 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:34,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:34,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:34,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:34,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 62 transitions, 462 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:34,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:34,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:34,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:34,511 INFO L124 PetriNetUnfolderBase]: 250/447 cut-off events. [2024-06-21 19:14:34,511 INFO L125 PetriNetUnfolderBase]: For 1855/1855 co-relation queries the response was YES. [2024-06-21 19:14:34,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1915 conditions, 447 events. 250/447 cut-off events. For 1855/1855 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 1620 event pairs, 44 based on Foata normal form. 5/450 useless extension candidates. Maximal degree in co-relation 1878. Up to 414 conditions per place. [2024-06-21 19:14:34,514 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 53 selfloop transitions, 15 changer transitions 0/70 dead transitions. [2024-06-21 19:14:34,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 70 transitions, 620 flow [2024-06-21 19:14:34,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 19:14:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 19:14:34,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 82 transitions. [2024-06-21 19:14:34,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3778801843317972 [2024-06-21 19:14:34,515 INFO L175 Difference]: Start difference. First operand has 65 places, 62 transitions, 462 flow. Second operand 7 states and 82 transitions. [2024-06-21 19:14:34,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 70 transitions, 620 flow [2024-06-21 19:14:34,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 70 transitions, 589 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:34,520 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 469 flow [2024-06-21 19:14:34,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-06-21 19:14:34,521 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 39 predicate places. [2024-06-21 19:14:34,521 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 469 flow [2024-06-21 19:14:34,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:34,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:34,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:34,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 19:14:34,522 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)] === [2024-06-21 19:14:34,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:34,522 INFO L85 PathProgramCache]: Analyzing trace with hash -199597024, now seen corresponding path program 4 times [2024-06-21 19:14:34,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:34,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640859883] [2024-06-21 19:14:34,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:34,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:35,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:35,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:35,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640859883] [2024-06-21 19:14:35,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640859883] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:35,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:35,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 19:14:35,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877237882] [2024-06-21 19:14:35,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:35,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 19:14:35,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:35,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 19:14:35,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 19:14:35,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:35,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 469 flow. Second operand has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:35,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:35,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:35,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:35,697 INFO L124 PetriNetUnfolderBase]: 248/444 cut-off events. [2024-06-21 19:14:35,698 INFO L125 PetriNetUnfolderBase]: For 2049/2049 co-relation queries the response was YES. [2024-06-21 19:14:35,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1930 conditions, 444 events. 248/444 cut-off events. For 2049/2049 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1614 event pairs, 42 based on Foata normal form. 1/443 useless extension candidates. Maximal degree in co-relation 1891. Up to 397 conditions per place. [2024-06-21 19:14:35,701 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 58 selfloop transitions, 22 changer transitions 0/82 dead transitions. [2024-06-21 19:14:35,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 82 transitions, 727 flow [2024-06-21 19:14:35,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 95 transitions. [2024-06-21 19:14:35,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38306451612903225 [2024-06-21 19:14:35,703 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 469 flow. Second operand 8 states and 95 transitions. [2024-06-21 19:14:35,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 82 transitions, 727 flow [2024-06-21 19:14:35,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 82 transitions, 695 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:35,707 INFO L231 Difference]: Finished difference. Result has 74 places, 72 transitions, 588 flow [2024-06-21 19:14:35,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=588, PETRI_PLACES=74, PETRI_TRANSITIONS=72} [2024-06-21 19:14:35,708 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 44 predicate places. [2024-06-21 19:14:35,708 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 72 transitions, 588 flow [2024-06-21 19:14:35,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.571428571428571) internal successors, (53), 7 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:35,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:35,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:35,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 19:14:35,709 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)] === [2024-06-21 19:14:35,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:35,709 INFO L85 PathProgramCache]: Analyzing trace with hash -662753096, now seen corresponding path program 1 times [2024-06-21 19:14:35,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:35,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448981366] [2024-06-21 19:14:35,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:35,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:35,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:37,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:37,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:37,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448981366] [2024-06-21 19:14:37,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448981366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:37,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:37,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:37,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747048463] [2024-06-21 19:14:37,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:37,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:37,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:37,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:37,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:37,493 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:37,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 72 transitions, 588 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:37,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:37,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:37,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:37,830 INFO L124 PetriNetUnfolderBase]: 266/477 cut-off events. [2024-06-21 19:14:37,830 INFO L125 PetriNetUnfolderBase]: For 2632/2632 co-relation queries the response was YES. [2024-06-21 19:14:37,831 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2184 conditions, 477 events. 266/477 cut-off events. For 2632/2632 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1804 event pairs, 51 based on Foata normal form. 2/477 useless extension candidates. Maximal degree in co-relation 2142. Up to 438 conditions per place. [2024-06-21 19:14:37,833 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 74 selfloop transitions, 15 changer transitions 0/91 dead transitions. [2024-06-21 19:14:37,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 91 transitions, 855 flow [2024-06-21 19:14:37,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:37,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 93 transitions. [2024-06-21 19:14:37,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-21 19:14:37,835 INFO L175 Difference]: Start difference. First operand has 74 places, 72 transitions, 588 flow. Second operand 8 states and 93 transitions. [2024-06-21 19:14:37,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 91 transitions, 855 flow [2024-06-21 19:14:37,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 91 transitions, 822 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-06-21 19:14:37,841 INFO L231 Difference]: Finished difference. Result has 82 places, 79 transitions, 664 flow [2024-06-21 19:14:37,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=664, PETRI_PLACES=82, PETRI_TRANSITIONS=79} [2024-06-21 19:14:37,842 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 52 predicate places. [2024-06-21 19:14:37,842 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 79 transitions, 664 flow [2024-06-21 19:14:37,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:37,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:37,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:37,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 19:14:37,843 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)] === [2024-06-21 19:14:37,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:37,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1039458718, now seen corresponding path program 1 times [2024-06-21 19:14:37,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:37,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522210275] [2024-06-21 19:14:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:37,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:39,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:39,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522210275] [2024-06-21 19:14:39,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522210275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:39,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:39,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:14:39,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752994504] [2024-06-21 19:14:39,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:39,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:14:39,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:39,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:14:39,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:14:39,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:39,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 79 transitions, 664 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) [2024-06-21 19:14:39,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:39,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:39,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:39,618 INFO L124 PetriNetUnfolderBase]: 285/508 cut-off events. [2024-06-21 19:14:39,618 INFO L125 PetriNetUnfolderBase]: For 3061/3061 co-relation queries the response was YES. [2024-06-21 19:14:39,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2390 conditions, 508 events. 285/508 cut-off events. For 3061/3061 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1943 event pairs, 57 based on Foata normal form. 1/507 useless extension candidates. Maximal degree in co-relation 2344. Up to 435 conditions per place. [2024-06-21 19:14:39,621 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 70 selfloop transitions, 28 changer transitions 0/100 dead transitions. [2024-06-21 19:14:39,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 100 transitions, 976 flow [2024-06-21 19:14:39,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:39,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:39,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 19:14:39,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-21 19:14:39,623 INFO L175 Difference]: Start difference. First operand has 82 places, 79 transitions, 664 flow. Second operand 9 states and 106 transitions. [2024-06-21 19:14:39,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 100 transitions, 976 flow [2024-06-21 19:14:39,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 100 transitions, 942 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-21 19:14:39,633 INFO L231 Difference]: Finished difference. Result has 90 places, 89 transitions, 781 flow [2024-06-21 19:14:39,634 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=630, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=781, PETRI_PLACES=90, PETRI_TRANSITIONS=89} [2024-06-21 19:14:39,634 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 60 predicate places. [2024-06-21 19:14:39,634 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 89 transitions, 781 flow [2024-06-21 19:14:39,634 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) [2024-06-21 19:14:39,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:39,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:39,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 19:14:39,635 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)] === [2024-06-21 19:14:39,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:39,635 INFO L85 PathProgramCache]: Analyzing trace with hash -657984800, now seen corresponding path program 2 times [2024-06-21 19:14:39,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:39,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584803482] [2024-06-21 19:14:39,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:39,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:41,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:41,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:41,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584803482] [2024-06-21 19:14:41,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584803482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:41,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:41,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:41,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960915537] [2024-06-21 19:14:41,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:41,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:41,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:41,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:41,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:41,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:41,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 89 transitions, 781 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:41,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:41,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:41,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:41,333 INFO L124 PetriNetUnfolderBase]: 294/523 cut-off events. [2024-06-21 19:14:41,333 INFO L125 PetriNetUnfolderBase]: For 3900/3900 co-relation queries the response was YES. [2024-06-21 19:14:41,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2607 conditions, 523 events. 294/523 cut-off events. For 3900/3900 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 2031 event pairs, 57 based on Foata normal form. 3/524 useless extension candidates. Maximal degree in co-relation 2558. Up to 448 conditions per place. [2024-06-21 19:14:41,338 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 73 selfloop transitions, 30 changer transitions 0/105 dead transitions. [2024-06-21 19:14:41,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 105 transitions, 1061 flow [2024-06-21 19:14:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 100 transitions. [2024-06-21 19:14:41,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 19:14:41,340 INFO L175 Difference]: Start difference. First operand has 90 places, 89 transitions, 781 flow. Second operand 8 states and 100 transitions. [2024-06-21 19:14:41,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 105 transitions, 1061 flow [2024-06-21 19:14:41,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 105 transitions, 1036 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-21 19:14:41,347 INFO L231 Difference]: Finished difference. Result has 96 places, 93 transitions, 860 flow [2024-06-21 19:14:41,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=860, PETRI_PLACES=96, PETRI_TRANSITIONS=93} [2024-06-21 19:14:41,348 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 66 predicate places. [2024-06-21 19:14:41,348 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 93 transitions, 860 flow [2024-06-21 19:14:41,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:41,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:41,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:41,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 19:14:41,349 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)] === [2024-06-21 19:14:41,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:41,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1034817088, now seen corresponding path program 3 times [2024-06-21 19:14:41,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:41,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772992629] [2024-06-21 19:14:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:41,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:41,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:42,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:42,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:42,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772992629] [2024-06-21 19:14:42,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772992629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:42,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:42,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:42,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950791486] [2024-06-21 19:14:42,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:42,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:42,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:42,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:42,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:42,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:42,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 93 transitions, 860 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:42,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:42,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:42,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:42,807 INFO L124 PetriNetUnfolderBase]: 300/533 cut-off events. [2024-06-21 19:14:42,807 INFO L125 PetriNetUnfolderBase]: For 4418/4418 co-relation queries the response was YES. [2024-06-21 19:14:42,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2784 conditions, 533 events. 300/533 cut-off events. For 4418/4418 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2085 event pairs, 59 based on Foata normal form. 1/532 useless extension candidates. Maximal degree in co-relation 2733. Up to 481 conditions per place. [2024-06-21 19:14:42,811 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 78 selfloop transitions, 26 changer transitions 0/106 dead transitions. [2024-06-21 19:14:42,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 106 transitions, 1130 flow [2024-06-21 19:14:42,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:42,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:42,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 97 transitions. [2024-06-21 19:14:42,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3911290322580645 [2024-06-21 19:14:42,812 INFO L175 Difference]: Start difference. First operand has 96 places, 93 transitions, 860 flow. Second operand 8 states and 97 transitions. [2024-06-21 19:14:42,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 106 transitions, 1130 flow [2024-06-21 19:14:42,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 106 transitions, 1066 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:42,821 INFO L231 Difference]: Finished difference. Result has 99 places, 98 transitions, 909 flow [2024-06-21 19:14:42,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=796, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=909, PETRI_PLACES=99, PETRI_TRANSITIONS=98} [2024-06-21 19:14:42,821 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 69 predicate places. [2024-06-21 19:14:42,821 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 98 transitions, 909 flow [2024-06-21 19:14:42,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:42,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:42,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:42,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 19:14:42,822 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)] === [2024-06-21 19:14:42,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:42,822 INFO L85 PathProgramCache]: Analyzing trace with hash -751330638, now seen corresponding path program 4 times [2024-06-21 19:14:42,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:42,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933831940] [2024-06-21 19:14:42,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:42,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:42,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:43,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:43,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933831940] [2024-06-21 19:14:43,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933831940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:43,757 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:43,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:43,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517874203] [2024-06-21 19:14:43,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:43,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:43,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:43,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:43,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:43,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:43,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 98 transitions, 909 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:43,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:43,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:43,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:44,068 INFO L124 PetriNetUnfolderBase]: 304/540 cut-off events. [2024-06-21 19:14:44,069 INFO L125 PetriNetUnfolderBase]: For 5021/5021 co-relation queries the response was YES. [2024-06-21 19:14:44,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2853 conditions, 540 events. 304/540 cut-off events. For 5021/5021 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2110 event pairs, 56 based on Foata normal form. 3/541 useless extension candidates. Maximal degree in co-relation 2800. Up to 505 conditions per place. [2024-06-21 19:14:44,072 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 89 selfloop transitions, 19 changer transitions 0/110 dead transitions. [2024-06-21 19:14:44,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 110 transitions, 1187 flow [2024-06-21 19:14:44,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:44,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-21 19:14:44,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:14:44,073 INFO L175 Difference]: Start difference. First operand has 99 places, 98 transitions, 909 flow. Second operand 8 states and 92 transitions. [2024-06-21 19:14:44,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 110 transitions, 1187 flow [2024-06-21 19:14:44,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 110 transitions, 1134 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-21 19:14:44,082 INFO L231 Difference]: Finished difference. Result has 104 places, 103 transitions, 964 flow [2024-06-21 19:14:44,082 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=964, PETRI_PLACES=104, PETRI_TRANSITIONS=103} [2024-06-21 19:14:44,083 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 74 predicate places. [2024-06-21 19:14:44,083 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 103 transitions, 964 flow [2024-06-21 19:14:44,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:44,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:44,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:44,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 19:14:44,083 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)] === [2024-06-21 19:14:44,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:44,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1076472256, now seen corresponding path program 5 times [2024-06-21 19:14:44,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:44,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164754997] [2024-06-21 19:14:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:44,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:45,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:45,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:45,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164754997] [2024-06-21 19:14:45,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164754997] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:45,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:45,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:45,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624335453] [2024-06-21 19:14:45,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:45,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:45,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:45,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:45,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:45,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:45,237 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 103 transitions, 964 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:45,237 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:45,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:45,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:45,470 INFO L124 PetriNetUnfolderBase]: 307/545 cut-off events. [2024-06-21 19:14:45,471 INFO L125 PetriNetUnfolderBase]: For 5371/5371 co-relation queries the response was YES. [2024-06-21 19:14:45,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2961 conditions, 545 events. 307/545 cut-off events. For 5371/5371 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2135 event pairs, 56 based on Foata normal form. 1/544 useless extension candidates. Maximal degree in co-relation 2906. Up to 494 conditions per place. [2024-06-21 19:14:45,475 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 85 selfloop transitions, 27 changer transitions 0/114 dead transitions. [2024-06-21 19:14:45,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 114 transitions, 1268 flow [2024-06-21 19:14:45,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:45,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:45,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 96 transitions. [2024-06-21 19:14:45,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:14:45,476 INFO L175 Difference]: Start difference. First operand has 104 places, 103 transitions, 964 flow. Second operand 8 states and 96 transitions. [2024-06-21 19:14:45,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 114 transitions, 1268 flow [2024-06-21 19:14:45,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 114 transitions, 1208 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:45,486 INFO L231 Difference]: Finished difference. Result has 107 places, 106 transitions, 1009 flow [2024-06-21 19:14:45,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=904, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1009, PETRI_PLACES=107, PETRI_TRANSITIONS=106} [2024-06-21 19:14:45,487 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 77 predicate places. [2024-06-21 19:14:45,487 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 106 transitions, 1009 flow [2024-06-21 19:14:45,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:45,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:45,488 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:45,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 19:14:45,488 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)] === [2024-06-21 19:14:45,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:45,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1076478766, now seen corresponding path program 6 times [2024-06-21 19:14:45,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:45,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947719792] [2024-06-21 19:14:45,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:45,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:45,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:46,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:46,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:46,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947719792] [2024-06-21 19:14:46,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947719792] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:46,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:46,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:46,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012808969] [2024-06-21 19:14:46,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:46,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:46,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:46,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:46,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:46,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:46,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 106 transitions, 1009 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:46,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:46,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:46,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:46,807 INFO L124 PetriNetUnfolderBase]: 305/542 cut-off events. [2024-06-21 19:14:46,807 INFO L125 PetriNetUnfolderBase]: For 5736/5736 co-relation queries the response was YES. [2024-06-21 19:14:46,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2982 conditions, 542 events. 305/542 cut-off events. For 5736/5736 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2137 event pairs, 56 based on Foata normal form. 1/541 useless extension candidates. Maximal degree in co-relation 2926. Up to 507 conditions per place. [2024-06-21 19:14:46,814 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 91 selfloop transitions, 20 changer transitions 0/113 dead transitions. [2024-06-21 19:14:46,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 113 transitions, 1247 flow [2024-06-21 19:14:46,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:46,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:46,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 92 transitions. [2024-06-21 19:14:46,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:14:46,816 INFO L175 Difference]: Start difference. First operand has 107 places, 106 transitions, 1009 flow. Second operand 8 states and 92 transitions. [2024-06-21 19:14:46,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 113 transitions, 1247 flow [2024-06-21 19:14:46,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 113 transitions, 1175 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:46,830 INFO L231 Difference]: Finished difference. Result has 110 places, 106 transitions, 982 flow [2024-06-21 19:14:46,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=982, PETRI_PLACES=110, PETRI_TRANSITIONS=106} [2024-06-21 19:14:46,830 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 80 predicate places. [2024-06-21 19:14:46,831 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 106 transitions, 982 flow [2024-06-21 19:14:46,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:46,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:46,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:46,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 19:14:46,831 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)] === [2024-06-21 19:14:46,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:46,832 INFO L85 PathProgramCache]: Analyzing trace with hash -776111444, now seen corresponding path program 2 times [2024-06-21 19:14:46,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:46,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095391045] [2024-06-21 19:14:46,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:46,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:47,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:47,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:47,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095391045] [2024-06-21 19:14:47,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095391045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:47,412 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:47,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:47,417 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491796842] [2024-06-21 19:14:47,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:47,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:47,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:47,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:47,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:47,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:47,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 106 transitions, 982 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:47,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:47,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:47,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:47,945 INFO L124 PetriNetUnfolderBase]: 326/579 cut-off events. [2024-06-21 19:14:47,946 INFO L125 PetriNetUnfolderBase]: For 6477/6477 co-relation queries the response was YES. [2024-06-21 19:14:47,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3162 conditions, 579 events. 326/579 cut-off events. For 6477/6477 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 2341 event pairs, 43 based on Foata normal form. 2/579 useless extension candidates. Maximal degree in co-relation 3105. Up to 472 conditions per place. [2024-06-21 19:14:47,952 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 106 selfloop transitions, 35 changer transitions 0/143 dead transitions. [2024-06-21 19:14:47,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 143 transitions, 1493 flow [2024-06-21 19:14:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:14:47,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:14:47,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 19:14:47,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 19:14:47,953 INFO L175 Difference]: Start difference. First operand has 110 places, 106 transitions, 982 flow. Second operand 12 states and 139 transitions. [2024-06-21 19:14:47,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 143 transitions, 1493 flow [2024-06-21 19:14:47,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 143 transitions, 1433 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:47,986 INFO L231 Difference]: Finished difference. Result has 116 places, 119 transitions, 1134 flow [2024-06-21 19:14:47,986 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1134, PETRI_PLACES=116, PETRI_TRANSITIONS=119} [2024-06-21 19:14:47,986 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 86 predicate places. [2024-06-21 19:14:47,987 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 119 transitions, 1134 flow [2024-06-21 19:14:47,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:47,987 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:47,987 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:47,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 19:14:47,987 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)] === [2024-06-21 19:14:47,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:47,988 INFO L85 PathProgramCache]: Analyzing trace with hash 447966290, now seen corresponding path program 3 times [2024-06-21 19:14:47,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:47,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156007353] [2024-06-21 19:14:47,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:47,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:48,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:48,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:48,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156007353] [2024-06-21 19:14:48,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156007353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:48,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:48,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:48,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858327761] [2024-06-21 19:14:48,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:48,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:48,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:48,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:48,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:48,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:48,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 119 transitions, 1134 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:48,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:48,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:48,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:49,218 INFO L124 PetriNetUnfolderBase]: 340/603 cut-off events. [2024-06-21 19:14:49,219 INFO L125 PetriNetUnfolderBase]: For 7246/7246 co-relation queries the response was YES. [2024-06-21 19:14:49,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3372 conditions, 603 events. 340/603 cut-off events. For 7246/7246 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2482 event pairs, 44 based on Foata normal form. 2/603 useless extension candidates. Maximal degree in co-relation 3314. Up to 511 conditions per place. [2024-06-21 19:14:49,223 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 110 selfloop transitions, 30 changer transitions 0/142 dead transitions. [2024-06-21 19:14:49,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 142 transitions, 1523 flow [2024-06-21 19:14:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:49,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 19:14:49,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 19:14:49,224 INFO L175 Difference]: Start difference. First operand has 116 places, 119 transitions, 1134 flow. Second operand 9 states and 110 transitions. [2024-06-21 19:14:49,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 142 transitions, 1523 flow [2024-06-21 19:14:49,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 142 transitions, 1395 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:49,240 INFO L231 Difference]: Finished difference. Result has 118 places, 124 transitions, 1128 flow [2024-06-21 19:14:49,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1128, PETRI_PLACES=118, PETRI_TRANSITIONS=124} [2024-06-21 19:14:49,241 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 88 predicate places. [2024-06-21 19:14:49,241 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 124 transitions, 1128 flow [2024-06-21 19:14:49,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:49,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:49,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:49,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 19:14:49,242 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)] === [2024-06-21 19:14:49,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:49,242 INFO L85 PathProgramCache]: Analyzing trace with hash 476714636, now seen corresponding path program 7 times [2024-06-21 19:14:49,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:49,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035648370] [2024-06-21 19:14:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:49,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:49,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:49,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:49,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035648370] [2024-06-21 19:14:49,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035648370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:49,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:49,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:49,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634089365] [2024-06-21 19:14:49,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:49,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:49,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:49,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:49,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:50,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:50,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 124 transitions, 1128 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:50,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:50,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:50,050 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:50,432 INFO L124 PetriNetUnfolderBase]: 343/608 cut-off events. [2024-06-21 19:14:50,432 INFO L125 PetriNetUnfolderBase]: For 7546/7546 co-relation queries the response was YES. [2024-06-21 19:14:50,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3370 conditions, 608 events. 343/608 cut-off events. For 7546/7546 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2507 event pairs, 52 based on Foata normal form. 1/607 useless extension candidates. Maximal degree in co-relation 3314. Up to 498 conditions per place. [2024-06-21 19:14:50,436 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 93 selfloop transitions, 48 changer transitions 0/143 dead transitions. [2024-06-21 19:14:50,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 143 transitions, 1528 flow [2024-06-21 19:14:50,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:50,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 110 transitions. [2024-06-21 19:14:50,438 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3942652329749104 [2024-06-21 19:14:50,438 INFO L175 Difference]: Start difference. First operand has 118 places, 124 transitions, 1128 flow. Second operand 9 states and 110 transitions. [2024-06-21 19:14:50,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 143 transitions, 1528 flow [2024-06-21 19:14:50,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 143 transitions, 1473 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:50,456 INFO L231 Difference]: Finished difference. Result has 123 places, 129 transitions, 1255 flow [2024-06-21 19:14:50,456 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1073, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1255, PETRI_PLACES=123, PETRI_TRANSITIONS=129} [2024-06-21 19:14:50,457 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 93 predicate places. [2024-06-21 19:14:50,457 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 129 transitions, 1255 flow [2024-06-21 19:14:50,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:50,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:50,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:50,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 19:14:50,457 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)] === [2024-06-21 19:14:50,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:50,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1510185384, now seen corresponding path program 4 times [2024-06-21 19:14:50,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:50,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128546535] [2024-06-21 19:14:50,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:50,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:52,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:52,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128546535] [2024-06-21 19:14:52,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128546535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:52,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:52,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:52,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946140907] [2024-06-21 19:14:52,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:52,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:52,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:52,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:52,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:52,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 129 transitions, 1255 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:52,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:52,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:52,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:52,541 INFO L124 PetriNetUnfolderBase]: 339/602 cut-off events. [2024-06-21 19:14:52,541 INFO L125 PetriNetUnfolderBase]: For 8254/8254 co-relation queries the response was YES. [2024-06-21 19:14:52,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3437 conditions, 602 events. 339/602 cut-off events. For 8254/8254 co-relation queries the response was YES. Maximal size of possible extension queue 50. Compared 2475 event pairs, 56 based on Foata normal form. 2/602 useless extension candidates. Maximal degree in co-relation 3379. Up to 556 conditions per place. [2024-06-21 19:14:52,545 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 127 selfloop transitions, 17 changer transitions 0/146 dead transitions. [2024-06-21 19:14:52,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 146 transitions, 1616 flow [2024-06-21 19:14:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:52,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:52,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 98 transitions. [2024-06-21 19:14:52,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-21 19:14:52,546 INFO L175 Difference]: Start difference. First operand has 123 places, 129 transitions, 1255 flow. Second operand 8 states and 98 transitions. [2024-06-21 19:14:52,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 146 transitions, 1616 flow [2024-06-21 19:14:52,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 146 transitions, 1542 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:52,563 INFO L231 Difference]: Finished difference. Result has 127 places, 131 transitions, 1260 flow [2024-06-21 19:14:52,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1181, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1260, PETRI_PLACES=127, PETRI_TRANSITIONS=131} [2024-06-21 19:14:52,563 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 97 predicate places. [2024-06-21 19:14:52,564 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 131 transitions, 1260 flow [2024-06-21 19:14:52,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:52,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:52,564 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:52,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 19:14:52,565 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)] === [2024-06-21 19:14:52,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:52,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1510305540, now seen corresponding path program 8 times [2024-06-21 19:14:52,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:52,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469322109] [2024-06-21 19:14:52,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:52,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:52,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:53,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:53,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469322109] [2024-06-21 19:14:53,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469322109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:53,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:53,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:53,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966462535] [2024-06-21 19:14:53,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:53,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:53,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:53,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:53,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:54,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:54,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 131 transitions, 1260 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:54,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:54,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:54,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:54,252 INFO L124 PetriNetUnfolderBase]: 345/612 cut-off events. [2024-06-21 19:14:54,252 INFO L125 PetriNetUnfolderBase]: For 8678/8678 co-relation queries the response was YES. [2024-06-21 19:14:54,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3506 conditions, 612 events. 345/612 cut-off events. For 8678/8678 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2524 event pairs, 61 based on Foata normal form. 1/611 useless extension candidates. Maximal degree in co-relation 3446. Up to 536 conditions per place. [2024-06-21 19:14:54,257 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 113 selfloop transitions, 33 changer transitions 0/148 dead transitions. [2024-06-21 19:14:54,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 148 transitions, 1675 flow [2024-06-21 19:14:54,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:54,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:54,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 106 transitions. [2024-06-21 19:14:54,258 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4274193548387097 [2024-06-21 19:14:54,258 INFO L175 Difference]: Start difference. First operand has 127 places, 131 transitions, 1260 flow. Second operand 8 states and 106 transitions. [2024-06-21 19:14:54,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 148 transitions, 1675 flow [2024-06-21 19:14:54,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 148 transitions, 1619 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:54,277 INFO L231 Difference]: Finished difference. Result has 131 places, 135 transitions, 1327 flow [2024-06-21 19:14:54,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1204, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1327, PETRI_PLACES=131, PETRI_TRANSITIONS=135} [2024-06-21 19:14:54,277 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 101 predicate places. [2024-06-21 19:14:54,277 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 135 transitions, 1327 flow [2024-06-21 19:14:54,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:54,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:54,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:54,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 19:14:54,278 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)] === [2024-06-21 19:14:54,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:54,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1892539726, now seen corresponding path program 9 times [2024-06-21 19:14:54,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:54,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254718528] [2024-06-21 19:14:54,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:54,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:54,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:55,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:55,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:55,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254718528] [2024-06-21 19:14:55,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254718528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:55,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:55,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:55,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758679194] [2024-06-21 19:14:55,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:55,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:55,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:55,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:55,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:55,438 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:55,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 135 transitions, 1327 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:55,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:55,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:55,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:55,776 INFO L124 PetriNetUnfolderBase]: 348/617 cut-off events. [2024-06-21 19:14:55,776 INFO L125 PetriNetUnfolderBase]: For 9447/9447 co-relation queries the response was YES. [2024-06-21 19:14:55,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3585 conditions, 617 events. 348/617 cut-off events. For 9447/9447 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2545 event pairs, 59 based on Foata normal form. 1/616 useless extension candidates. Maximal degree in co-relation 3523. Up to 558 conditions per place. [2024-06-21 19:14:55,781 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 117 selfloop transitions, 29 changer transitions 0/148 dead transitions. [2024-06-21 19:14:55,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 148 transitions, 1671 flow [2024-06-21 19:14:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:14:55,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:14:55,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 106 transitions. [2024-06-21 19:14:55,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37992831541218636 [2024-06-21 19:14:55,783 INFO L175 Difference]: Start difference. First operand has 131 places, 135 transitions, 1327 flow. Second operand 9 states and 106 transitions. [2024-06-21 19:14:55,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 148 transitions, 1671 flow [2024-06-21 19:14:55,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 148 transitions, 1580 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 19:14:55,804 INFO L231 Difference]: Finished difference. Result has 135 places, 137 transitions, 1327 flow [2024-06-21 19:14:55,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1242, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1327, PETRI_PLACES=135, PETRI_TRANSITIONS=137} [2024-06-21 19:14:55,804 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 105 predicate places. [2024-06-21 19:14:55,804 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 137 transitions, 1327 flow [2024-06-21 19:14:55,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:55,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:55,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:55,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 19:14:55,805 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)] === [2024-06-21 19:14:55,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:55,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1685921780, now seen corresponding path program 1 times [2024-06-21 19:14:55,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:55,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478801039] [2024-06-21 19:14:55,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:55,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:55,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:56,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:56,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478801039] [2024-06-21 19:14:56,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478801039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:56,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:56,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:56,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925481958] [2024-06-21 19:14:56,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:56,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:56,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:56,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:56,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:56,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:56,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 137 transitions, 1327 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:56,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:56,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:56,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:57,340 INFO L124 PetriNetUnfolderBase]: 349/619 cut-off events. [2024-06-21 19:14:57,340 INFO L125 PetriNetUnfolderBase]: For 10153/10153 co-relation queries the response was YES. [2024-06-21 19:14:57,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3575 conditions, 619 events. 349/619 cut-off events. For 10153/10153 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2571 event pairs, 57 based on Foata normal form. 2/619 useless extension candidates. Maximal degree in co-relation 3512. Up to 536 conditions per place. [2024-06-21 19:14:57,347 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 118 selfloop transitions, 32 changer transitions 0/152 dead transitions. [2024-06-21 19:14:57,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 152 transitions, 1689 flow [2024-06-21 19:14:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2024-06-21 19:14:57,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-21 19:14:57,356 INFO L175 Difference]: Start difference. First operand has 135 places, 137 transitions, 1327 flow. Second operand 8 states and 102 transitions. [2024-06-21 19:14:57,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 152 transitions, 1689 flow [2024-06-21 19:14:57,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 152 transitions, 1628 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-21 19:14:57,377 INFO L231 Difference]: Finished difference. Result has 136 places, 139 transitions, 1361 flow [2024-06-21 19:14:57,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1266, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1361, PETRI_PLACES=136, PETRI_TRANSITIONS=139} [2024-06-21 19:14:57,378 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 106 predicate places. [2024-06-21 19:14:57,378 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 139 transitions, 1361 flow [2024-06-21 19:14:57,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:57,378 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:57,378 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:57,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 19:14:57,378 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)] === [2024-06-21 19:14:57,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:57,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1514947170, now seen corresponding path program 10 times [2024-06-21 19:14:57,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:57,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528267852] [2024-06-21 19:14:57,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:57,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:57,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:14:58,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:14:58,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:14:58,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528267852] [2024-06-21 19:14:58,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528267852] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:14:58,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:14:58,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:14:58,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072787234] [2024-06-21 19:14:58,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:14:58,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:14:58,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:14:58,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:14:58,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:14:58,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:14:58,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 139 transitions, 1361 flow. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:58,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:14:58,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:14:58,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:14:58,902 INFO L124 PetriNetUnfolderBase]: 347/616 cut-off events. [2024-06-21 19:14:58,902 INFO L125 PetriNetUnfolderBase]: For 10416/10416 co-relation queries the response was YES. [2024-06-21 19:14:58,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3613 conditions, 616 events. 347/616 cut-off events. For 10416/10416 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 2555 event pairs, 59 based on Foata normal form. 1/615 useless extension candidates. Maximal degree in co-relation 3550. Up to 551 conditions per place. [2024-06-21 19:14:58,906 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 117 selfloop transitions, 31 changer transitions 0/150 dead transitions. [2024-06-21 19:14:58,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 150 transitions, 1685 flow [2024-06-21 19:14:58,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 19:14:58,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 19:14:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 102 transitions. [2024-06-21 19:14:58,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-21 19:14:58,907 INFO L175 Difference]: Start difference. First operand has 136 places, 139 transitions, 1361 flow. Second operand 8 states and 102 transitions. [2024-06-21 19:14:58,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 150 transitions, 1685 flow [2024-06-21 19:14:58,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 150 transitions, 1602 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-21 19:14:58,942 INFO L231 Difference]: Finished difference. Result has 138 places, 139 transitions, 1345 flow [2024-06-21 19:14:58,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1345, PETRI_PLACES=138, PETRI_TRANSITIONS=139} [2024-06-21 19:14:58,943 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 108 predicate places. [2024-06-21 19:14:58,943 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 139 transitions, 1345 flow [2024-06-21 19:14:58,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:14:58,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:14:58,944 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:14:58,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 19:14:58,944 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)] === [2024-06-21 19:14:58,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:14:58,944 INFO L85 PathProgramCache]: Analyzing trace with hash -751022808, now seen corresponding path program 1 times [2024-06-21 19:14:58,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:14:58,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045650186] [2024-06-21 19:14:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:14:58,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:14:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:00,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:00,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:00,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045650186] [2024-06-21 19:15:00,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045650186] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:00,468 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:00,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:00,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390458355] [2024-06-21 19:15:00,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:00,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:00,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:00,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:00,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:00,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:00,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 139 transitions, 1345 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:00,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:00,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:00,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:00,910 INFO L124 PetriNetUnfolderBase]: 344/611 cut-off events. [2024-06-21 19:15:00,910 INFO L125 PetriNetUnfolderBase]: For 10807/10807 co-relation queries the response was YES. [2024-06-21 19:15:00,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 611 events. 344/611 cut-off events. For 10807/10807 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 2518 event pairs, 72 based on Foata normal form. 2/611 useless extension candidates. Maximal degree in co-relation 3483. Up to 581 conditions per place. [2024-06-21 19:15:00,914 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 131 selfloop transitions, 14 changer transitions 0/147 dead transitions. [2024-06-21 19:15:00,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 147 transitions, 1653 flow [2024-06-21 19:15:00,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:00,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 94 transitions. [2024-06-21 19:15:00,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33691756272401435 [2024-06-21 19:15:00,915 INFO L175 Difference]: Start difference. First operand has 138 places, 139 transitions, 1345 flow. Second operand 9 states and 94 transitions. [2024-06-21 19:15:00,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 147 transitions, 1653 flow [2024-06-21 19:15:00,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 147 transitions, 1544 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 19:15:00,935 INFO L231 Difference]: Finished difference. Result has 136 places, 139 transitions, 1268 flow [2024-06-21 19:15:00,935 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1268, PETRI_PLACES=136, PETRI_TRANSITIONS=139} [2024-06-21 19:15:00,935 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 106 predicate places. [2024-06-21 19:15:00,936 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 139 transitions, 1268 flow [2024-06-21 19:15:00,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:00,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:00,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:00,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 19:15:00,936 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)] === [2024-06-21 19:15:00,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:00,937 INFO L85 PathProgramCache]: Analyzing trace with hash 2132794213, now seen corresponding path program 1 times [2024-06-21 19:15:00,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:00,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702148223] [2024-06-21 19:15:00,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:00,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:00,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:03,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:03,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:03,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702148223] [2024-06-21 19:15:03,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702148223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:03,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:03,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:03,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620880271] [2024-06-21 19:15:03,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:03,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:03,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:03,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:03,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:03,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:03,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 139 transitions, 1268 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:03,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:03,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:03,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:03,672 INFO L124 PetriNetUnfolderBase]: 350/622 cut-off events. [2024-06-21 19:15:03,673 INFO L125 PetriNetUnfolderBase]: For 11539/11539 co-relation queries the response was YES. [2024-06-21 19:15:03,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3521 conditions, 622 events. 350/622 cut-off events. For 11539/11539 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2585 event pairs, 69 based on Foata normal form. 2/622 useless extension candidates. Maximal degree in co-relation 3460. Up to 573 conditions per place. [2024-06-21 19:15:03,676 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 136 selfloop transitions, 17 changer transitions 0/155 dead transitions. [2024-06-21 19:15:03,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 155 transitions, 1629 flow [2024-06-21 19:15:03,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:03,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:03,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 103 transitions. [2024-06-21 19:15:03,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36917562724014336 [2024-06-21 19:15:03,678 INFO L175 Difference]: Start difference. First operand has 136 places, 139 transitions, 1268 flow. Second operand 9 states and 103 transitions. [2024-06-21 19:15:03,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 155 transitions, 1629 flow [2024-06-21 19:15:03,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 155 transitions, 1580 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:03,702 INFO L231 Difference]: Finished difference. Result has 137 places, 141 transitions, 1274 flow [2024-06-21 19:15:03,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1274, PETRI_PLACES=137, PETRI_TRANSITIONS=141} [2024-06-21 19:15:03,703 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 107 predicate places. [2024-06-21 19:15:03,703 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 141 transitions, 1274 flow [2024-06-21 19:15:03,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:03,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:03,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:03,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 19:15:03,704 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)] === [2024-06-21 19:15:03,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:03,704 INFO L85 PathProgramCache]: Analyzing trace with hash 2136518863, now seen corresponding path program 2 times [2024-06-21 19:15:03,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:03,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699434563] [2024-06-21 19:15:03,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:03,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:05,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:05,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:05,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699434563] [2024-06-21 19:15:05,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699434563] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:05,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:05,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:05,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710051628] [2024-06-21 19:15:05,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:05,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:05,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:05,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:05,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:05,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:05,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 141 transitions, 1274 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:05,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:05,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:05,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:05,673 INFO L124 PetriNetUnfolderBase]: 408/716 cut-off events. [2024-06-21 19:15:05,674 INFO L125 PetriNetUnfolderBase]: For 15169/15169 co-relation queries the response was YES. [2024-06-21 19:15:05,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4183 conditions, 716 events. 408/716 cut-off events. For 15169/15169 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 3087 event pairs, 79 based on Foata normal form. 2/716 useless extension candidates. Maximal degree in co-relation 4124. Up to 531 conditions per place. [2024-06-21 19:15:05,678 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 123 selfloop transitions, 48 changer transitions 0/173 dead transitions. [2024-06-21 19:15:05,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 173 transitions, 1888 flow [2024-06-21 19:15:05,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:05,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:05,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 19:15:05,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 19:15:05,679 INFO L175 Difference]: Start difference. First operand has 137 places, 141 transitions, 1274 flow. Second operand 9 states and 118 transitions. [2024-06-21 19:15:05,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 173 transitions, 1888 flow [2024-06-21 19:15:05,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 173 transitions, 1834 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:05,705 INFO L231 Difference]: Finished difference. Result has 140 places, 152 transitions, 1454 flow [2024-06-21 19:15:05,705 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1226, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1454, PETRI_PLACES=140, PETRI_TRANSITIONS=152} [2024-06-21 19:15:05,705 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 110 predicate places. [2024-06-21 19:15:05,705 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 152 transitions, 1454 flow [2024-06-21 19:15:05,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:05,706 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:05,706 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:05,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 19:15:05,706 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)] === [2024-06-21 19:15:05,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:05,706 INFO L85 PathProgramCache]: Analyzing trace with hash 2136519080, now seen corresponding path program 1 times [2024-06-21 19:15:05,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:05,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432661060] [2024-06-21 19:15:05,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:05,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:05,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:07,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:07,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:07,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432661060] [2024-06-21 19:15:07,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432661060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:07,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:07,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:07,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504301453] [2024-06-21 19:15:07,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:07,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:07,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:07,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:07,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:07,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:07,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 152 transitions, 1454 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) [2024-06-21 19:15:07,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:07,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:07,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:08,133 INFO L124 PetriNetUnfolderBase]: 424/742 cut-off events. [2024-06-21 19:15:08,133 INFO L125 PetriNetUnfolderBase]: For 17495/17495 co-relation queries the response was YES. [2024-06-21 19:15:08,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4579 conditions, 742 events. 424/742 cut-off events. For 17495/17495 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3218 event pairs, 85 based on Foata normal form. 2/742 useless extension candidates. Maximal degree in co-relation 4519. Up to 636 conditions per place. [2024-06-21 19:15:08,138 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 127 selfloop transitions, 40 changer transitions 0/169 dead transitions. [2024-06-21 19:15:08,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 169 transitions, 1940 flow [2024-06-21 19:15:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:08,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:08,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 19:15:08,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 19:15:08,139 INFO L175 Difference]: Start difference. First operand has 140 places, 152 transitions, 1454 flow. Second operand 10 states and 117 transitions. [2024-06-21 19:15:08,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 169 transitions, 1940 flow [2024-06-21 19:15:08,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 169 transitions, 1898 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 19:15:08,169 INFO L231 Difference]: Finished difference. Result has 147 places, 156 transitions, 1557 flow [2024-06-21 19:15:08,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1412, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1557, PETRI_PLACES=147, PETRI_TRANSITIONS=156} [2024-06-21 19:15:08,170 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 117 predicate places. [2024-06-21 19:15:08,170 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 156 transitions, 1557 flow [2024-06-21 19:15:08,170 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) [2024-06-21 19:15:08,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:08,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:08,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 19:15:08,171 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)] === [2024-06-21 19:15:08,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:08,171 INFO L85 PathProgramCache]: Analyzing trace with hash 2136513283, now seen corresponding path program 3 times [2024-06-21 19:15:08,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:08,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825523444] [2024-06-21 19:15:08,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:08,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:08,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:09,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:09,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825523444] [2024-06-21 19:15:09,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825523444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:09,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:09,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:09,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431418325] [2024-06-21 19:15:09,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:09,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:09,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:09,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:09,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:09,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:09,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 156 transitions, 1557 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:09,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:09,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:09,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:10,111 INFO L124 PetriNetUnfolderBase]: 420/736 cut-off events. [2024-06-21 19:15:10,112 INFO L125 PetriNetUnfolderBase]: For 17908/17908 co-relation queries the response was YES. [2024-06-21 19:15:10,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4619 conditions, 736 events. 420/736 cut-off events. For 17908/17908 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 3179 event pairs, 81 based on Foata normal form. 2/736 useless extension candidates. Maximal degree in co-relation 4557. Up to 554 conditions per place. [2024-06-21 19:15:10,133 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 127 selfloop transitions, 47 changer transitions 0/176 dead transitions. [2024-06-21 19:15:10,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 176 transitions, 2038 flow [2024-06-21 19:15:10,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:10,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:10,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 118 transitions. [2024-06-21 19:15:10,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4229390681003584 [2024-06-21 19:15:10,134 INFO L175 Difference]: Start difference. First operand has 147 places, 156 transitions, 1557 flow. Second operand 9 states and 118 transitions. [2024-06-21 19:15:10,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 176 transitions, 2038 flow [2024-06-21 19:15:10,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 176 transitions, 1980 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:10,166 INFO L231 Difference]: Finished difference. Result has 150 places, 156 transitions, 1599 flow [2024-06-21 19:15:10,166 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1499, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1599, PETRI_PLACES=150, PETRI_TRANSITIONS=156} [2024-06-21 19:15:10,167 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 120 predicate places. [2024-06-21 19:15:10,167 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 156 transitions, 1599 flow [2024-06-21 19:15:10,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:10,167 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:10,167 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:10,167 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 19:15:10,168 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)] === [2024-06-21 19:15:10,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:10,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1077308650, now seen corresponding path program 2 times [2024-06-21 19:15:10,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:10,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577525201] [2024-06-21 19:15:10,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:10,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:10,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:11,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:11,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:11,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577525201] [2024-06-21 19:15:11,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577525201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:11,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:11,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:11,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022150756] [2024-06-21 19:15:11,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:11,818 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:11,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:11,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:11,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:11,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:11,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 156 transitions, 1599 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) [2024-06-21 19:15:11,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:11,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:11,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:12,335 INFO L124 PetriNetUnfolderBase]: 426/746 cut-off events. [2024-06-21 19:15:12,335 INFO L125 PetriNetUnfolderBase]: For 19345/19345 co-relation queries the response was YES. [2024-06-21 19:15:12,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4787 conditions, 746 events. 426/746 cut-off events. For 19345/19345 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3255 event pairs, 85 based on Foata normal form. 2/746 useless extension candidates. Maximal degree in co-relation 4723. Up to 692 conditions per place. [2024-06-21 19:15:12,340 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 140 selfloop transitions, 26 changer transitions 0/168 dead transitions. [2024-06-21 19:15:12,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 168 transitions, 1987 flow [2024-06-21 19:15:12,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 19:15:12,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-21 19:15:12,365 INFO L175 Difference]: Start difference. First operand has 150 places, 156 transitions, 1599 flow. Second operand 10 states and 111 transitions. [2024-06-21 19:15:12,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 168 transitions, 1987 flow [2024-06-21 19:15:12,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 168 transitions, 1884 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:12,401 INFO L231 Difference]: Finished difference. Result has 153 places, 158 transitions, 1585 flow [2024-06-21 19:15:12,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1496, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1585, PETRI_PLACES=153, PETRI_TRANSITIONS=158} [2024-06-21 19:15:12,402 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 123 predicate places. [2024-06-21 19:15:12,402 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 158 transitions, 1585 flow [2024-06-21 19:15:12,402 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) [2024-06-21 19:15:12,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:12,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:12,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 19:15:12,403 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)] === [2024-06-21 19:15:12,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:12,403 INFO L85 PathProgramCache]: Analyzing trace with hash 1077308433, now seen corresponding path program 4 times [2024-06-21 19:15:12,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:12,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713033669] [2024-06-21 19:15:12,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:12,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:13,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:13,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:13,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713033669] [2024-06-21 19:15:13,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713033669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:13,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:13,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:13,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706405650] [2024-06-21 19:15:13,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:13,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:13,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:13,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:13,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:13,634 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:13,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 158 transitions, 1585 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:13,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:13,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:13,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:13,854 INFO L124 PetriNetUnfolderBase]: 432/756 cut-off events. [2024-06-21 19:15:13,854 INFO L125 PetriNetUnfolderBase]: For 20390/20390 co-relation queries the response was YES. [2024-06-21 19:15:13,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4810 conditions, 756 events. 432/756 cut-off events. For 20390/20390 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 3298 event pairs, 85 based on Foata normal form. 2/756 useless extension candidates. Maximal degree in co-relation 4745. Up to 702 conditions per place. [2024-06-21 19:15:13,859 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 142 selfloop transitions, 26 changer transitions 0/170 dead transitions. [2024-06-21 19:15:13,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 170 transitions, 1967 flow [2024-06-21 19:15:13,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:13,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:13,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 105 transitions. [2024-06-21 19:15:13,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 19:15:13,881 INFO L175 Difference]: Start difference. First operand has 153 places, 158 transitions, 1585 flow. Second operand 9 states and 105 transitions. [2024-06-21 19:15:13,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 170 transitions, 1967 flow [2024-06-21 19:15:13,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 170 transitions, 1902 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:13,916 INFO L231 Difference]: Finished difference. Result has 155 places, 160 transitions, 1601 flow [2024-06-21 19:15:13,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1520, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1601, PETRI_PLACES=155, PETRI_TRANSITIONS=160} [2024-06-21 19:15:13,917 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 125 predicate places. [2024-06-21 19:15:13,917 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 160 transitions, 1601 flow [2024-06-21 19:15:13,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:13,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:13,917 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:13,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 19:15:13,918 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)] === [2024-06-21 19:15:13,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:13,918 INFO L85 PathProgramCache]: Analyzing trace with hash 1199365654, now seen corresponding path program 3 times [2024-06-21 19:15:13,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:13,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359427116] [2024-06-21 19:15:13,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:13,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:13,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:15,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:15,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:15,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359427116] [2024-06-21 19:15:15,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359427116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:15,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:15,403 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:15,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151753919] [2024-06-21 19:15:15,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:15,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:15,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:15,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:15,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:15,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:15,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 160 transitions, 1601 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:15,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:15,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:15,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:15,863 INFO L124 PetriNetUnfolderBase]: 438/766 cut-off events. [2024-06-21 19:15:15,864 INFO L125 PetriNetUnfolderBase]: For 21650/21650 co-relation queries the response was YES. [2024-06-21 19:15:15,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4913 conditions, 766 events. 438/766 cut-off events. For 21650/21650 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 3367 event pairs, 80 based on Foata normal form. 2/766 useless extension candidates. Maximal degree in co-relation 4847. Up to 671 conditions per place. [2024-06-21 19:15:15,869 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 137 selfloop transitions, 36 changer transitions 0/175 dead transitions. [2024-06-21 19:15:15,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 175 transitions, 2025 flow [2024-06-21 19:15:15,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:15,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:15,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 19:15:15,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 19:15:15,870 INFO L175 Difference]: Start difference. First operand has 155 places, 160 transitions, 1601 flow. Second operand 9 states and 112 transitions. [2024-06-21 19:15:15,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 175 transitions, 2025 flow [2024-06-21 19:15:15,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 175 transitions, 1966 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:15,906 INFO L231 Difference]: Finished difference. Result has 157 places, 162 transitions, 1655 flow [2024-06-21 19:15:15,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1542, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1655, PETRI_PLACES=157, PETRI_TRANSITIONS=162} [2024-06-21 19:15:15,906 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 127 predicate places. [2024-06-21 19:15:15,906 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 162 transitions, 1655 flow [2024-06-21 19:15:15,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:15,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:15,907 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:15,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 19:15:15,907 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)] === [2024-06-21 19:15:15,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:15,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1199365437, now seen corresponding path program 5 times [2024-06-21 19:15:15,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:15,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894916667] [2024-06-21 19:15:15,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:15,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:17,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:17,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894916667] [2024-06-21 19:15:17,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894916667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:17,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:17,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:17,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851846801] [2024-06-21 19:15:17,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:17,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:17,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:17,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:17,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:17,245 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:17,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 162 transitions, 1655 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:17,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:17,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:17,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:17,549 INFO L124 PetriNetUnfolderBase]: 460/802 cut-off events. [2024-06-21 19:15:17,549 INFO L125 PetriNetUnfolderBase]: For 24213/24213 co-relation queries the response was YES. [2024-06-21 19:15:17,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5240 conditions, 802 events. 460/802 cut-off events. For 24213/24213 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3542 event pairs, 85 based on Foata normal form. 2/802 useless extension candidates. Maximal degree in co-relation 5173. Up to 719 conditions per place. [2024-06-21 19:15:17,558 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 147 selfloop transitions, 34 changer transitions 0/183 dead transitions. [2024-06-21 19:15:17,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 183 transitions, 2199 flow [2024-06-21 19:15:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:17,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:17,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 19:15:17,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 19:15:17,568 INFO L175 Difference]: Start difference. First operand has 157 places, 162 transitions, 1655 flow. Second operand 9 states and 112 transitions. [2024-06-21 19:15:17,568 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 183 transitions, 2199 flow [2024-06-21 19:15:17,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 183 transitions, 2108 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:17,615 INFO L231 Difference]: Finished difference. Result has 160 places, 169 transitions, 1731 flow [2024-06-21 19:15:17,615 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1564, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1731, PETRI_PLACES=160, PETRI_TRANSITIONS=169} [2024-06-21 19:15:17,615 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 130 predicate places. [2024-06-21 19:15:17,616 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 169 transitions, 1731 flow [2024-06-21 19:15:17,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:17,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:17,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:17,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 19:15:17,616 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)] === [2024-06-21 19:15:17,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:17,617 INFO L85 PathProgramCache]: Analyzing trace with hash -2014563483, now seen corresponding path program 6 times [2024-06-21 19:15:17,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:17,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801381013] [2024-06-21 19:15:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:17,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:17,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:18,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:18,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:18,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801381013] [2024-06-21 19:15:18,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801381013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:18,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:19,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:19,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028514372] [2024-06-21 19:15:19,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:19,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:19,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:19,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:19,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:19,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:19,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 169 transitions, 1731 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:19,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:19,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:19,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:19,368 INFO L124 PetriNetUnfolderBase]: 456/796 cut-off events. [2024-06-21 19:15:19,368 INFO L125 PetriNetUnfolderBase]: For 24336/24336 co-relation queries the response was YES. [2024-06-21 19:15:19,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5190 conditions, 796 events. 456/796 cut-off events. For 24336/24336 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 3519 event pairs, 85 based on Foata normal form. 2/796 useless extension candidates. Maximal degree in co-relation 5121. Up to 716 conditions per place. [2024-06-21 19:15:19,373 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 144 selfloop transitions, 35 changer transitions 0/181 dead transitions. [2024-06-21 19:15:19,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 181 transitions, 2124 flow [2024-06-21 19:15:19,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:19,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:19,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 19:15:19,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 19:15:19,375 INFO L175 Difference]: Start difference. First operand has 160 places, 169 transitions, 1731 flow. Second operand 9 states and 109 transitions. [2024-06-21 19:15:19,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 181 transitions, 2124 flow [2024-06-21 19:15:19,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 181 transitions, 2066 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-21 19:15:19,423 INFO L231 Difference]: Finished difference. Result has 165 places, 169 transitions, 1749 flow [2024-06-21 19:15:19,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1673, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1749, PETRI_PLACES=165, PETRI_TRANSITIONS=169} [2024-06-21 19:15:19,423 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 135 predicate places. [2024-06-21 19:15:19,423 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 169 transitions, 1749 flow [2024-06-21 19:15:19,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:19,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:19,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:19,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 19:15:19,424 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)] === [2024-06-21 19:15:19,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:19,424 INFO L85 PathProgramCache]: Analyzing trace with hash -2072905398, now seen corresponding path program 4 times [2024-06-21 19:15:19,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:19,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174207885] [2024-06-21 19:15:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:19,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:20,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:20,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:20,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174207885] [2024-06-21 19:15:20,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174207885] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:20,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:20,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:20,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552767714] [2024-06-21 19:15:20,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:20,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:20,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:20,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:20,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:21,073 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:21,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 169 transitions, 1749 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) [2024-06-21 19:15:21,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:21,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:21,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:21,496 INFO L124 PetriNetUnfolderBase]: 462/805 cut-off events. [2024-06-21 19:15:21,497 INFO L125 PetriNetUnfolderBase]: For 25651/25651 co-relation queries the response was YES. [2024-06-21 19:15:21,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5317 conditions, 805 events. 462/805 cut-off events. For 25651/25651 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 3581 event pairs, 80 based on Foata normal form. 2/805 useless extension candidates. Maximal degree in co-relation 5246. Up to 749 conditions per place. [2024-06-21 19:15:21,502 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 156 selfloop transitions, 24 changer transitions 0/182 dead transitions. [2024-06-21 19:15:21,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 182 transitions, 2177 flow [2024-06-21 19:15:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:21,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:21,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 110 transitions. [2024-06-21 19:15:21,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:15:21,506 INFO L175 Difference]: Start difference. First operand has 165 places, 169 transitions, 1749 flow. Second operand 10 states and 110 transitions. [2024-06-21 19:15:21,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 182 transitions, 2177 flow [2024-06-21 19:15:21,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 182 transitions, 2110 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:21,559 INFO L231 Difference]: Finished difference. Result has 168 places, 171 transitions, 1771 flow [2024-06-21 19:15:21,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1682, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1771, PETRI_PLACES=168, PETRI_TRANSITIONS=171} [2024-06-21 19:15:21,560 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 138 predicate places. [2024-06-21 19:15:21,560 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 171 transitions, 1771 flow [2024-06-21 19:15:21,560 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) [2024-06-21 19:15:21,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:21,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:21,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 19:15:21,561 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)] === [2024-06-21 19:15:21,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:21,561 INFO L85 PathProgramCache]: Analyzing trace with hash -732387702, now seen corresponding path program 5 times [2024-06-21 19:15:21,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:21,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973668866] [2024-06-21 19:15:21,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:21,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:21,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:23,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:23,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:23,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973668866] [2024-06-21 19:15:23,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973668866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:23,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:23,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:23,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957106371] [2024-06-21 19:15:23,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:23,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:23,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:23,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:23,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:23,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:23,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 171 transitions, 1771 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) [2024-06-21 19:15:23,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:23,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:23,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:23,580 INFO L124 PetriNetUnfolderBase]: 468/815 cut-off events. [2024-06-21 19:15:23,580 INFO L125 PetriNetUnfolderBase]: For 27044/27044 co-relation queries the response was YES. [2024-06-21 19:15:23,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5434 conditions, 815 events. 468/815 cut-off events. For 27044/27044 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 3634 event pairs, 83 based on Foata normal form. 2/815 useless extension candidates. Maximal degree in co-relation 5362. Up to 771 conditions per place. [2024-06-21 19:15:23,585 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 161 selfloop transitions, 20 changer transitions 0/183 dead transitions. [2024-06-21 19:15:23,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 183 transitions, 2199 flow [2024-06-21 19:15:23,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 19:15:23,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-21 19:15:23,586 INFO L175 Difference]: Start difference. First operand has 168 places, 171 transitions, 1771 flow. Second operand 10 states and 108 transitions. [2024-06-21 19:15:23,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 183 transitions, 2199 flow [2024-06-21 19:15:23,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 183 transitions, 2125 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:23,644 INFO L231 Difference]: Finished difference. Result has 170 places, 173 transitions, 1782 flow [2024-06-21 19:15:23,644 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1697, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1782, PETRI_PLACES=170, PETRI_TRANSITIONS=173} [2024-06-21 19:15:23,644 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 140 predicate places. [2024-06-21 19:15:23,645 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 173 transitions, 1782 flow [2024-06-21 19:15:23,645 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) [2024-06-21 19:15:23,645 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:23,645 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:23,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 19:15:23,645 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)] === [2024-06-21 19:15:23,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:23,646 INFO L85 PathProgramCache]: Analyzing trace with hash 622045306, now seen corresponding path program 6 times [2024-06-21 19:15:23,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:23,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053173122] [2024-06-21 19:15:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:23,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:23,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:25,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:25,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053173122] [2024-06-21 19:15:25,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053173122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:25,036 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:25,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:15:25,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160862028] [2024-06-21 19:15:25,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:25,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:15:25,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:25,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:15:25,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:15:25,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:25,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 173 transitions, 1782 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) [2024-06-21 19:15:25,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:25,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:25,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:25,593 INFO L124 PetriNetUnfolderBase]: 474/825 cut-off events. [2024-06-21 19:15:25,593 INFO L125 PetriNetUnfolderBase]: For 28519/28519 co-relation queries the response was YES. [2024-06-21 19:15:25,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5534 conditions, 825 events. 474/825 cut-off events. For 28519/28519 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 3678 event pairs, 85 based on Foata normal form. 2/825 useless extension candidates. Maximal degree in co-relation 5461. Up to 783 conditions per place. [2024-06-21 19:15:25,598 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 160 selfloop transitions, 22 changer transitions 0/184 dead transitions. [2024-06-21 19:15:25,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 184 transitions, 2206 flow [2024-06-21 19:15:25,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:25,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:25,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 19:15:25,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-21 19:15:25,599 INFO L175 Difference]: Start difference. First operand has 170 places, 173 transitions, 1782 flow. Second operand 10 states and 108 transitions. [2024-06-21 19:15:25,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 184 transitions, 2206 flow [2024-06-21 19:15:25,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 184 transitions, 2139 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:25,662 INFO L231 Difference]: Finished difference. Result has 173 places, 175 transitions, 1804 flow [2024-06-21 19:15:25,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1715, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1804, PETRI_PLACES=173, PETRI_TRANSITIONS=175} [2024-06-21 19:15:25,663 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 143 predicate places. [2024-06-21 19:15:25,663 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 175 transitions, 1804 flow [2024-06-21 19:15:25,663 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) [2024-06-21 19:15:25,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:25,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:25,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 19:15:25,664 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)] === [2024-06-21 19:15:25,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:25,664 INFO L85 PathProgramCache]: Analyzing trace with hash -988895869, now seen corresponding path program 7 times [2024-06-21 19:15:25,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:25,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523430459] [2024-06-21 19:15:25,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:25,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:26,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:26,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:26,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523430459] [2024-06-21 19:15:26,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523430459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:26,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:26,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:26,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386395534] [2024-06-21 19:15:26,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:26,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:26,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:26,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:26,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:27,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:27,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 175 transitions, 1804 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:27,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:27,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:27,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:27,331 INFO L124 PetriNetUnfolderBase]: 480/835 cut-off events. [2024-06-21 19:15:27,331 INFO L125 PetriNetUnfolderBase]: For 30018/30018 co-relation queries the response was YES. [2024-06-21 19:15:27,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5611 conditions, 835 events. 480/835 cut-off events. For 30018/30018 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 3740 event pairs, 84 based on Foata normal form. 2/835 useless extension candidates. Maximal degree in co-relation 5537. Up to 793 conditions per place. [2024-06-21 19:15:27,338 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 162 selfloop transitions, 22 changer transitions 0/186 dead transitions. [2024-06-21 19:15:27,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 186 transitions, 2222 flow [2024-06-21 19:15:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:27,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 19:15:27,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 19:15:27,339 INFO L175 Difference]: Start difference. First operand has 173 places, 175 transitions, 1804 flow. Second operand 9 states and 102 transitions. [2024-06-21 19:15:27,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 186 transitions, 2222 flow [2024-06-21 19:15:27,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 186 transitions, 2155 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:27,405 INFO L231 Difference]: Finished difference. Result has 174 places, 177 transitions, 1818 flow [2024-06-21 19:15:27,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1737, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1818, PETRI_PLACES=174, PETRI_TRANSITIONS=177} [2024-06-21 19:15:27,406 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 144 predicate places. [2024-06-21 19:15:27,406 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 177 transitions, 1818 flow [2024-06-21 19:15:27,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:27,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:27,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:27,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 19:15:27,407 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)] === [2024-06-21 19:15:27,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:27,407 INFO L85 PathProgramCache]: Analyzing trace with hash 878545599, now seen corresponding path program 8 times [2024-06-21 19:15:27,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:27,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879582544] [2024-06-21 19:15:27,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:27,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:27,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:28,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:28,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879582544] [2024-06-21 19:15:28,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879582544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:28,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:28,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:28,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631383472] [2024-06-21 19:15:28,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:28,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:28,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:28,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:28,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:28,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:28,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 177 transitions, 1818 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:28,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:28,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:28,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:29,252 INFO L124 PetriNetUnfolderBase]: 478/833 cut-off events. [2024-06-21 19:15:29,252 INFO L125 PetriNetUnfolderBase]: For 31363/31363 co-relation queries the response was YES. [2024-06-21 19:15:29,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5490 conditions, 833 events. 478/833 cut-off events. For 31363/31363 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 3754 event pairs, 79 based on Foata normal form. 6/837 useless extension candidates. Maximal degree in co-relation 5415. Up to 775 conditions per place. [2024-06-21 19:15:29,258 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 164 selfloop transitions, 23 changer transitions 0/189 dead transitions. [2024-06-21 19:15:29,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 189 transitions, 2252 flow [2024-06-21 19:15:29,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:29,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:29,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 104 transitions. [2024-06-21 19:15:29,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3727598566308244 [2024-06-21 19:15:29,259 INFO L175 Difference]: Start difference. First operand has 174 places, 177 transitions, 1818 flow. Second operand 9 states and 104 transitions. [2024-06-21 19:15:29,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 189 transitions, 2252 flow [2024-06-21 19:15:29,321 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 189 transitions, 2193 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:29,324 INFO L231 Difference]: Finished difference. Result has 176 places, 179 transitions, 1849 flow [2024-06-21 19:15:29,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1849, PETRI_PLACES=176, PETRI_TRANSITIONS=179} [2024-06-21 19:15:29,325 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 146 predicate places. [2024-06-21 19:15:29,325 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 179 transitions, 1849 flow [2024-06-21 19:15:29,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:29,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:29,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:29,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 19:15:29,325 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)] === [2024-06-21 19:15:29,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:29,326 INFO L85 PathProgramCache]: Analyzing trace with hash -732395142, now seen corresponding path program 7 times [2024-06-21 19:15:29,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:29,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936490074] [2024-06-21 19:15:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:29,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:30,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:30,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936490074] [2024-06-21 19:15:30,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936490074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:30,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:30,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586568667] [2024-06-21 19:15:30,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:30,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:31,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:31,075 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:31,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 179 transitions, 1849 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:31,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:31,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:31,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:31,487 INFO L124 PetriNetUnfolderBase]: 484/843 cut-off events. [2024-06-21 19:15:31,487 INFO L125 PetriNetUnfolderBase]: For 29910/29910 co-relation queries the response was YES. [2024-06-21 19:15:31,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5607 conditions, 843 events. 484/843 cut-off events. For 29910/29910 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 3807 event pairs, 81 based on Foata normal form. 2/843 useless extension candidates. Maximal degree in co-relation 5531. Up to 801 conditions per place. [2024-06-21 19:15:31,493 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 166 selfloop transitions, 22 changer transitions 0/190 dead transitions. [2024-06-21 19:15:31,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 190 transitions, 2289 flow [2024-06-21 19:15:31,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:31,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:31,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 102 transitions. [2024-06-21 19:15:31,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 19:15:31,494 INFO L175 Difference]: Start difference. First operand has 176 places, 179 transitions, 1849 flow. Second operand 9 states and 102 transitions. [2024-06-21 19:15:31,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 190 transitions, 2289 flow [2024-06-21 19:15:31,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 190 transitions, 2221 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:31,561 INFO L231 Difference]: Finished difference. Result has 178 places, 181 transitions, 1874 flow [2024-06-21 19:15:31,561 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1781, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1874, PETRI_PLACES=178, PETRI_TRANSITIONS=181} [2024-06-21 19:15:31,562 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 148 predicate places. [2024-06-21 19:15:31,562 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 181 transitions, 1874 flow [2024-06-21 19:15:31,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:31,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:31,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:31,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 19:15:31,562 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)] === [2024-06-21 19:15:31,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:31,563 INFO L85 PathProgramCache]: Analyzing trace with hash -722864223, now seen corresponding path program 1 times [2024-06-21 19:15:31,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:31,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664960460] [2024-06-21 19:15:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:31,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:31,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:32,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:32,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:32,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664960460] [2024-06-21 19:15:32,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664960460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:32,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:32,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723748937] [2024-06-21 19:15:32,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:32,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:32,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:32,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:32,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 181 transitions, 1874 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:32,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:32,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:32,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:32,910 INFO L124 PetriNetUnfolderBase]: 482/840 cut-off events. [2024-06-21 19:15:32,910 INFO L125 PetriNetUnfolderBase]: For 29422/29422 co-relation queries the response was YES. [2024-06-21 19:15:32,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5526 conditions, 840 events. 482/840 cut-off events. For 29422/29422 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3806 event pairs, 80 based on Foata normal form. 1/839 useless extension candidates. Maximal degree in co-relation 5449. Up to 807 conditions per place. [2024-06-21 19:15:32,916 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 170 selfloop transitions, 19 changer transitions 0/191 dead transitions. [2024-06-21 19:15:32,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 191 transitions, 2304 flow [2024-06-21 19:15:32,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:32,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 104 transitions. [2024-06-21 19:15:32,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33548387096774196 [2024-06-21 19:15:32,917 INFO L175 Difference]: Start difference. First operand has 178 places, 181 transitions, 1874 flow. Second operand 10 states and 104 transitions. [2024-06-21 19:15:32,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 191 transitions, 2304 flow [2024-06-21 19:15:32,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 191 transitions, 2233 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:32,976 INFO L231 Difference]: Finished difference. Result has 181 places, 183 transitions, 1888 flow [2024-06-21 19:15:32,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1888, PETRI_PLACES=181, PETRI_TRANSITIONS=183} [2024-06-21 19:15:32,978 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 151 predicate places. [2024-06-21 19:15:32,978 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 183 transitions, 1888 flow [2024-06-21 19:15:32,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:32,979 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:32,979 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:32,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 19:15:32,984 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)] === [2024-06-21 19:15:32,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:32,984 INFO L85 PathProgramCache]: Analyzing trace with hash -989103259, now seen corresponding path program 9 times [2024-06-21 19:15:32,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:32,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119107526] [2024-06-21 19:15:32,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:32,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:32,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:34,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:34,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119107526] [2024-06-21 19:15:34,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119107526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:34,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:34,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:34,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333375473] [2024-06-21 19:15:34,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:34,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:34,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:34,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:34,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:34,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:34,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 183 transitions, 1888 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:34,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:34,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:34,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:35,040 INFO L124 PetriNetUnfolderBase]: 513/890 cut-off events. [2024-06-21 19:15:35,041 INFO L125 PetriNetUnfolderBase]: For 36304/36304 co-relation queries the response was YES. [2024-06-21 19:15:35,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6063 conditions, 890 events. 513/890 cut-off events. For 36304/36304 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4071 event pairs, 77 based on Foata normal form. 2/890 useless extension candidates. Maximal degree in co-relation 5985. Up to 722 conditions per place. [2024-06-21 19:15:35,047 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 155 selfloop transitions, 50 changer transitions 0/207 dead transitions. [2024-06-21 19:15:35,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 207 transitions, 2648 flow [2024-06-21 19:15:35,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:35,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:35,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 112 transitions. [2024-06-21 19:15:35,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4014336917562724 [2024-06-21 19:15:35,048 INFO L175 Difference]: Start difference. First operand has 181 places, 183 transitions, 1888 flow. Second operand 9 states and 112 transitions. [2024-06-21 19:15:35,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 207 transitions, 2648 flow [2024-06-21 19:15:35,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 207 transitions, 2583 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:35,124 INFO L231 Difference]: Finished difference. Result has 184 places, 191 transitions, 2112 flow [2024-06-21 19:15:35,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1823, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2112, PETRI_PLACES=184, PETRI_TRANSITIONS=191} [2024-06-21 19:15:35,124 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 154 predicate places. [2024-06-21 19:15:35,124 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 191 transitions, 2112 flow [2024-06-21 19:15:35,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:35,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:35,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:35,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 19:15:35,125 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)] === [2024-06-21 19:15:35,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:35,125 INFO L85 PathProgramCache]: Analyzing trace with hash 2129325917, now seen corresponding path program 10 times [2024-06-21 19:15:35,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:35,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449022400] [2024-06-21 19:15:35,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:35,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:35,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:36,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:36,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:36,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449022400] [2024-06-21 19:15:36,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449022400] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:36,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:36,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:36,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983397490] [2024-06-21 19:15:36,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:36,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:36,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:36,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:36,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:36,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:36,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 191 transitions, 2112 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:36,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:36,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:36,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:36,744 INFO L124 PetriNetUnfolderBase]: 509/884 cut-off events. [2024-06-21 19:15:36,744 INFO L125 PetriNetUnfolderBase]: For 36818/36818 co-relation queries the response was YES. [2024-06-21 19:15:36,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6178 conditions, 884 events. 509/884 cut-off events. For 36818/36818 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4036 event pairs, 78 based on Foata normal form. 2/884 useless extension candidates. Maximal degree in co-relation 6097. Up to 719 conditions per place. [2024-06-21 19:15:36,751 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 161 selfloop transitions, 43 changer transitions 0/206 dead transitions. [2024-06-21 19:15:36,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 206 transitions, 2655 flow [2024-06-21 19:15:36,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:36,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:36,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 19:15:36,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 19:15:36,752 INFO L175 Difference]: Start difference. First operand has 184 places, 191 transitions, 2112 flow. Second operand 9 states and 111 transitions. [2024-06-21 19:15:36,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 206 transitions, 2655 flow [2024-06-21 19:15:36,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 206 transitions, 2537 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:36,828 INFO L231 Difference]: Finished difference. Result has 187 places, 191 transitions, 2089 flow [2024-06-21 19:15:36,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1998, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2089, PETRI_PLACES=187, PETRI_TRANSITIONS=191} [2024-06-21 19:15:36,829 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 157 predicate places. [2024-06-21 19:15:36,829 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 191 transitions, 2089 flow [2024-06-21 19:15:36,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:36,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:36,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:36,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 19:15:36,829 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)] === [2024-06-21 19:15:36,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:36,830 INFO L85 PathProgramCache]: Analyzing trace with hash 2129326134, now seen corresponding path program 8 times [2024-06-21 19:15:36,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:36,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935051492] [2024-06-21 19:15:36,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:36,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:36,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:38,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:38,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:38,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935051492] [2024-06-21 19:15:38,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935051492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:38,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:38,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:38,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504437039] [2024-06-21 19:15:38,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:38,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:38,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:38,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:38,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:38,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:38,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 191 transitions, 2089 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:38,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:38,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:38,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:38,687 INFO L124 PetriNetUnfolderBase]: 505/878 cut-off events. [2024-06-21 19:15:38,687 INFO L125 PetriNetUnfolderBase]: For 36173/36173 co-relation queries the response was YES. [2024-06-21 19:15:38,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5988 conditions, 878 events. 505/878 cut-off events. For 36173/36173 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 4004 event pairs, 81 based on Foata normal form. 2/878 useless extension candidates. Maximal degree in co-relation 5908. Up to 774 conditions per place. [2024-06-21 19:15:38,693 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 160 selfloop transitions, 41 changer transitions 0/203 dead transitions. [2024-06-21 19:15:38,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 203 transitions, 2611 flow [2024-06-21 19:15:38,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:38,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:38,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 113 transitions. [2024-06-21 19:15:38,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36451612903225805 [2024-06-21 19:15:38,701 INFO L175 Difference]: Start difference. First operand has 187 places, 191 transitions, 2089 flow. Second operand 10 states and 113 transitions. [2024-06-21 19:15:38,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 203 transitions, 2611 flow [2024-06-21 19:15:38,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 203 transitions, 2532 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:38,801 INFO L231 Difference]: Finished difference. Result has 191 places, 191 transitions, 2097 flow [2024-06-21 19:15:38,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2097, PETRI_PLACES=191, PETRI_TRANSITIONS=191} [2024-06-21 19:15:38,803 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 161 predicate places. [2024-06-21 19:15:38,804 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 191 transitions, 2097 flow [2024-06-21 19:15:38,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:38,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:38,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:38,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 19:15:38,806 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)] === [2024-06-21 19:15:38,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:38,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1710349951, now seen corresponding path program 11 times [2024-06-21 19:15:38,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:38,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943659816] [2024-06-21 19:15:38,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:38,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:38,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:39,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:39,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943659816] [2024-06-21 19:15:39,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943659816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:39,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:39,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:39,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188101920] [2024-06-21 19:15:39,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:39,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:39,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:39,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:39,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:39,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:39,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 191 transitions, 2097 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:39,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:39,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:39,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:40,239 INFO L124 PetriNetUnfolderBase]: 521/904 cut-off events. [2024-06-21 19:15:40,239 INFO L125 PetriNetUnfolderBase]: For 39456/39456 co-relation queries the response was YES. [2024-06-21 19:15:40,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6212 conditions, 904 events. 521/904 cut-off events. For 39456/39456 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 4145 event pairs, 50 based on Foata normal form. 2/904 useless extension candidates. Maximal degree in co-relation 6131. Up to 751 conditions per place. [2024-06-21 19:15:40,245 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 173 selfloop transitions, 47 changer transitions 0/222 dead transitions. [2024-06-21 19:15:40,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 222 transitions, 2745 flow [2024-06-21 19:15:40,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:15:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:15:40,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 159 transitions. [2024-06-21 19:15:40,247 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3663594470046083 [2024-06-21 19:15:40,247 INFO L175 Difference]: Start difference. First operand has 191 places, 191 transitions, 2097 flow. Second operand 14 states and 159 transitions. [2024-06-21 19:15:40,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 222 transitions, 2745 flow [2024-06-21 19:15:40,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 222 transitions, 2631 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:40,346 INFO L231 Difference]: Finished difference. Result has 197 places, 195 transitions, 2126 flow [2024-06-21 19:15:40,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=1983, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2126, PETRI_PLACES=197, PETRI_TRANSITIONS=195} [2024-06-21 19:15:40,346 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-21 19:15:40,346 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 195 transitions, 2126 flow [2024-06-21 19:15:40,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:40,347 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:40,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:40,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 19:15:40,347 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)] === [2024-06-21 19:15:40,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:40,347 INFO L85 PathProgramCache]: Analyzing trace with hash 1002054041, now seen corresponding path program 12 times [2024-06-21 19:15:40,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:40,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521220784] [2024-06-21 19:15:40,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:40,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:41,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:41,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521220784] [2024-06-21 19:15:41,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521220784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:41,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:41,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:41,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659232062] [2024-06-21 19:15:41,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:41,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:41,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:41,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:41,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:41,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:41,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 195 transitions, 2126 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:41,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:41,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:41,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:41,683 INFO L124 PetriNetUnfolderBase]: 527/914 cut-off events. [2024-06-21 19:15:41,683 INFO L125 PetriNetUnfolderBase]: For 41036/41036 co-relation queries the response was YES. [2024-06-21 19:15:41,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6308 conditions, 914 events. 527/914 cut-off events. For 41036/41036 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4216 event pairs, 56 based on Foata normal form. 2/914 useless extension candidates. Maximal degree in co-relation 6226. Up to 814 conditions per place. [2024-06-21 19:15:41,689 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 182 selfloop transitions, 33 changer transitions 0/217 dead transitions. [2024-06-21 19:15:41,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 217 transitions, 2643 flow [2024-06-21 19:15:41,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:41,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:41,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 120 transitions. [2024-06-21 19:15:41,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:15:41,691 INFO L175 Difference]: Start difference. First operand has 197 places, 195 transitions, 2126 flow. Second operand 10 states and 120 transitions. [2024-06-21 19:15:41,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 217 transitions, 2643 flow [2024-06-21 19:15:41,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 217 transitions, 2561 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-21 19:15:41,803 INFO L231 Difference]: Finished difference. Result has 197 places, 197 transitions, 2143 flow [2024-06-21 19:15:41,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2050, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2143, PETRI_PLACES=197, PETRI_TRANSITIONS=197} [2024-06-21 19:15:41,803 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 167 predicate places. [2024-06-21 19:15:41,804 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 197 transitions, 2143 flow [2024-06-21 19:15:41,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:41,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:41,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:41,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 19:15:41,808 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)] === [2024-06-21 19:15:41,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:41,808 INFO L85 PathProgramCache]: Analyzing trace with hash 1893252798, now seen corresponding path program 9 times [2024-06-21 19:15:41,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:41,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530300271] [2024-06-21 19:15:41,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:41,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:43,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:43,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:43,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530300271] [2024-06-21 19:15:43,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530300271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:43,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:43,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:43,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128124420] [2024-06-21 19:15:43,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:43,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:43,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:43,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:43,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:43,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:43,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 197 transitions, 2143 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:43,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:43,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:43,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:44,329 INFO L124 PetriNetUnfolderBase]: 528/916 cut-off events. [2024-06-21 19:15:44,329 INFO L125 PetriNetUnfolderBase]: For 41688/41688 co-relation queries the response was YES. [2024-06-21 19:15:44,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6338 conditions, 916 events. 528/916 cut-off events. For 41688/41688 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 4237 event pairs, 48 based on Foata normal form. 2/916 useless extension candidates. Maximal degree in co-relation 6254. Up to 683 conditions per place. [2024-06-21 19:15:44,336 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 133 selfloop transitions, 88 changer transitions 0/223 dead transitions. [2024-06-21 19:15:44,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 223 transitions, 2791 flow [2024-06-21 19:15:44,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:15:44,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:15:44,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 163 transitions. [2024-06-21 19:15:44,356 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37557603686635943 [2024-06-21 19:15:44,356 INFO L175 Difference]: Start difference. First operand has 197 places, 197 transitions, 2143 flow. Second operand 14 states and 163 transitions. [2024-06-21 19:15:44,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 223 transitions, 2791 flow [2024-06-21 19:15:44,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 223 transitions, 2718 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:44,472 INFO L231 Difference]: Finished difference. Result has 203 places, 199 transitions, 2305 flow [2024-06-21 19:15:44,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2070, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2305, PETRI_PLACES=203, PETRI_TRANSITIONS=199} [2024-06-21 19:15:44,473 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 173 predicate places. [2024-06-21 19:15:44,473 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 199 transitions, 2305 flow [2024-06-21 19:15:44,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:44,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:44,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:44,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 19:15:44,474 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)] === [2024-06-21 19:15:44,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:44,474 INFO L85 PathProgramCache]: Analyzing trace with hash 1005773111, now seen corresponding path program 13 times [2024-06-21 19:15:44,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:44,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114124458] [2024-06-21 19:15:44,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:44,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:45,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:45,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:45,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114124458] [2024-06-21 19:15:45,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114124458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:45,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:45,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:45,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186189020] [2024-06-21 19:15:45,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:45,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:45,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:45,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:45,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:45,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:45,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 199 transitions, 2305 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:45,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:45,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:45,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:45,877 INFO L124 PetriNetUnfolderBase]: 550/952 cut-off events. [2024-06-21 19:15:45,878 INFO L125 PetriNetUnfolderBase]: For 46446/46446 co-relation queries the response was YES. [2024-06-21 19:15:45,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6810 conditions, 952 events. 550/952 cut-off events. For 46446/46446 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4446 event pairs, 61 based on Foata normal form. 2/952 useless extension candidates. Maximal degree in co-relation 6725. Up to 600 conditions per place. [2024-06-21 19:15:45,884 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 141 selfloop transitions, 88 changer transitions 0/231 dead transitions. [2024-06-21 19:15:45,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 231 transitions, 3138 flow [2024-06-21 19:15:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:45,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:45,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 130 transitions. [2024-06-21 19:15:45,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:15:45,886 INFO L175 Difference]: Start difference. First operand has 203 places, 199 transitions, 2305 flow. Second operand 10 states and 130 transitions. [2024-06-21 19:15:45,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 231 transitions, 3138 flow [2024-06-21 19:15:46,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 231 transitions, 2980 flow, removed 21 selfloop flow, removed 11 redundant places. [2024-06-21 19:15:46,004 INFO L231 Difference]: Finished difference. Result has 204 places, 209 transitions, 2517 flow [2024-06-21 19:15:46,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2147, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2517, PETRI_PLACES=204, PETRI_TRANSITIONS=209} [2024-06-21 19:15:46,004 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 174 predicate places. [2024-06-21 19:15:46,004 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 209 transitions, 2517 flow [2024-06-21 19:15:46,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:46,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:46,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:46,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 19:15:46,005 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)] === [2024-06-21 19:15:46,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:46,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1005778691, now seen corresponding path program 14 times [2024-06-21 19:15:46,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:46,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102635590] [2024-06-21 19:15:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:46,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:46,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:46,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:46,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102635590] [2024-06-21 19:15:46,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102635590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:46,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:46,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:46,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199489937] [2024-06-21 19:15:46,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:46,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:46,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:46,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:46,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:46,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:46,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 209 transitions, 2517 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:46,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:46,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:46,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:47,461 INFO L124 PetriNetUnfolderBase]: 546/946 cut-off events. [2024-06-21 19:15:47,462 INFO L125 PetriNetUnfolderBase]: For 46066/46066 co-relation queries the response was YES. [2024-06-21 19:15:47,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6881 conditions, 946 events. 546/946 cut-off events. For 46066/46066 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 4390 event pairs, 60 based on Foata normal form. 2/946 useless extension candidates. Maximal degree in co-relation 6794. Up to 597 conditions per place. [2024-06-21 19:15:47,469 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 138 selfloop transitions, 90 changer transitions 0/230 dead transitions. [2024-06-21 19:15:47,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 230 transitions, 3135 flow [2024-06-21 19:15:47,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:15:47,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:15:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 128 transitions. [2024-06-21 19:15:47,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4129032258064516 [2024-06-21 19:15:47,470 INFO L175 Difference]: Start difference. First operand has 204 places, 209 transitions, 2517 flow. Second operand 10 states and 128 transitions. [2024-06-21 19:15:47,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 230 transitions, 3135 flow [2024-06-21 19:15:47,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 208 places, 230 transitions, 3028 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 19:15:47,583 INFO L231 Difference]: Finished difference. Result has 209 places, 209 transitions, 2595 flow [2024-06-21 19:15:47,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2410, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2595, PETRI_PLACES=209, PETRI_TRANSITIONS=209} [2024-06-21 19:15:47,584 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 179 predicate places. [2024-06-21 19:15:47,584 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 209 transitions, 2595 flow [2024-06-21 19:15:47,584 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:47,584 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:47,584 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:47,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 19:15:47,585 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)] === [2024-06-21 19:15:47,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:47,585 INFO L85 PathProgramCache]: Analyzing trace with hash -428892413, now seen corresponding path program 15 times [2024-06-21 19:15:47,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:47,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311825639] [2024-06-21 19:15:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:49,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:49,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:49,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311825639] [2024-06-21 19:15:49,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311825639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:49,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:49,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:49,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024941916] [2024-06-21 19:15:49,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:49,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:49,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:49,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:49,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:49,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:49,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 209 transitions, 2595 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:49,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:49,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:49,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:49,698 INFO L124 PetriNetUnfolderBase]: 542/940 cut-off events. [2024-06-21 19:15:49,699 INFO L125 PetriNetUnfolderBase]: For 45476/45476 co-relation queries the response was YES. [2024-06-21 19:15:49,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6898 conditions, 940 events. 542/940 cut-off events. For 45476/45476 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4409 event pairs, 77 based on Foata normal form. 2/940 useless extension candidates. Maximal degree in co-relation 6809. Up to 886 conditions per place. [2024-06-21 19:15:49,706 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 205 selfloop transitions, 19 changer transitions 0/226 dead transitions. [2024-06-21 19:15:49,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 226 transitions, 3094 flow [2024-06-21 19:15:49,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:49,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:49,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 108 transitions. [2024-06-21 19:15:49,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:15:49,707 INFO L175 Difference]: Start difference. First operand has 209 places, 209 transitions, 2595 flow. Second operand 9 states and 108 transitions. [2024-06-21 19:15:49,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 226 transitions, 3094 flow [2024-06-21 19:15:49,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 226 transitions, 2928 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:49,816 INFO L231 Difference]: Finished difference. Result has 211 places, 209 transitions, 2472 flow [2024-06-21 19:15:49,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2429, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2472, PETRI_PLACES=211, PETRI_TRANSITIONS=209} [2024-06-21 19:15:49,817 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 181 predicate places. [2024-06-21 19:15:49,817 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 209 transitions, 2472 flow [2024-06-21 19:15:49,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:49,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:49,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:49,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 19:15:49,818 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)] === [2024-06-21 19:15:49,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:49,818 INFO L85 PathProgramCache]: Analyzing trace with hash -425173343, now seen corresponding path program 16 times [2024-06-21 19:15:49,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:49,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598428273] [2024-06-21 19:15:49,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:49,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:49,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:51,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:51,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598428273] [2024-06-21 19:15:51,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598428273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:51,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:51,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:51,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800295879] [2024-06-21 19:15:51,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:51,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:51,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:51,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:51,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:51,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:51,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 209 transitions, 2472 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:51,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:51,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:51,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:51,588 INFO L124 PetriNetUnfolderBase]: 564/976 cut-off events. [2024-06-21 19:15:51,588 INFO L125 PetriNetUnfolderBase]: For 49503/49503 co-relation queries the response was YES. [2024-06-21 19:15:51,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7097 conditions, 976 events. 564/976 cut-off events. For 49503/49503 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4615 event pairs, 83 based on Foata normal form. 2/976 useless extension candidates. Maximal degree in co-relation 7008. Up to 830 conditions per place. [2024-06-21 19:15:51,598 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 189 selfloop transitions, 46 changer transitions 0/237 dead transitions. [2024-06-21 19:15:51,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 237 transitions, 3311 flow [2024-06-21 19:15:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:51,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:51,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 124 transitions. [2024-06-21 19:15:51,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 19:15:51,600 INFO L175 Difference]: Start difference. First operand has 211 places, 209 transitions, 2472 flow. Second operand 9 states and 124 transitions. [2024-06-21 19:15:51,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 237 transitions, 3311 flow [2024-06-21 19:15:51,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 237 transitions, 3247 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 19:15:51,770 INFO L231 Difference]: Finished difference. Result has 213 places, 216 transitions, 2618 flow [2024-06-21 19:15:51,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2408, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2618, PETRI_PLACES=213, PETRI_TRANSITIONS=216} [2024-06-21 19:15:51,771 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 183 predicate places. [2024-06-21 19:15:51,771 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 216 transitions, 2618 flow [2024-06-21 19:15:51,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:51,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:51,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:51,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 19:15:51,772 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)] === [2024-06-21 19:15:51,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:51,772 INFO L85 PathProgramCache]: Analyzing trace with hash -425167763, now seen corresponding path program 17 times [2024-06-21 19:15:51,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:51,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144268974] [2024-06-21 19:15:51,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:51,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:51,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:53,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:53,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144268974] [2024-06-21 19:15:53,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [144268974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:53,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:53,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:53,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415173969] [2024-06-21 19:15:53,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:53,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:53,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:53,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:53,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 216 transitions, 2618 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:53,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:53,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:53,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:53,663 INFO L124 PetriNetUnfolderBase]: 560/970 cut-off events. [2024-06-21 19:15:53,664 INFO L125 PetriNetUnfolderBase]: For 48827/48827 co-relation queries the response was YES. [2024-06-21 19:15:53,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7049 conditions, 970 events. 560/970 cut-off events. For 48827/48827 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 4574 event pairs, 82 based on Foata normal form. 2/970 useless extension candidates. Maximal degree in co-relation 6958. Up to 827 conditions per place. [2024-06-21 19:15:53,671 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 187 selfloop transitions, 47 changer transitions 0/236 dead transitions. [2024-06-21 19:15:53,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 236 transitions, 3252 flow [2024-06-21 19:15:53,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:53,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:53,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 122 transitions. [2024-06-21 19:15:53,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43727598566308246 [2024-06-21 19:15:53,678 INFO L175 Difference]: Start difference. First operand has 213 places, 216 transitions, 2618 flow. Second operand 9 states and 122 transitions. [2024-06-21 19:15:53,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 236 transitions, 3252 flow [2024-06-21 19:15:53,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 236 transitions, 3117 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-21 19:15:53,814 INFO L231 Difference]: Finished difference. Result has 217 places, 216 transitions, 2582 flow [2024-06-21 19:15:53,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2483, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2582, PETRI_PLACES=217, PETRI_TRANSITIONS=216} [2024-06-21 19:15:53,814 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 187 predicate places. [2024-06-21 19:15:53,814 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 216 transitions, 2582 flow [2024-06-21 19:15:53,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:53,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:53,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:53,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 19:15:53,815 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)] === [2024-06-21 19:15:53,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:53,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1460811391, now seen corresponding path program 18 times [2024-06-21 19:15:53,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:53,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664001071] [2024-06-21 19:15:53,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:53,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:53,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:55,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:55,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:55,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664001071] [2024-06-21 19:15:55,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1664001071] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:55,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:55,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:55,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120085692] [2024-06-21 19:15:55,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:55,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:55,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:55,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:55,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:55,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:55,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 216 transitions, 2582 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:55,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:55,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:55,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:55,989 INFO L124 PetriNetUnfolderBase]: 563/975 cut-off events. [2024-06-21 19:15:55,989 INFO L125 PetriNetUnfolderBase]: For 48915/48915 co-relation queries the response was YES. [2024-06-21 19:15:55,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7036 conditions, 975 events. 563/975 cut-off events. For 48915/48915 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 4622 event pairs, 80 based on Foata normal form. 1/974 useless extension candidates. Maximal degree in co-relation 6944. Up to 913 conditions per place. [2024-06-21 19:15:55,998 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 198 selfloop transitions, 30 changer transitions 0/230 dead transitions. [2024-06-21 19:15:55,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 230 transitions, 3086 flow [2024-06-21 19:15:55,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:55,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:55,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 109 transitions. [2024-06-21 19:15:55,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3906810035842294 [2024-06-21 19:15:55,999 INFO L175 Difference]: Start difference. First operand has 217 places, 216 transitions, 2582 flow. Second operand 9 states and 109 transitions. [2024-06-21 19:15:55,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 230 transitions, 3086 flow [2024-06-21 19:15:56,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 230 transitions, 3000 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-21 19:15:56,133 INFO L231 Difference]: Finished difference. Result has 220 places, 218 transitions, 2583 flow [2024-06-21 19:15:56,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2498, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2583, PETRI_PLACES=220, PETRI_TRANSITIONS=218} [2024-06-21 19:15:56,134 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 190 predicate places. [2024-06-21 19:15:56,134 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 218 transitions, 2583 flow [2024-06-21 19:15:56,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:56,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:56,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:56,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 19:15:56,134 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)] === [2024-06-21 19:15:56,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:56,135 INFO L85 PathProgramCache]: Analyzing trace with hash -281282813, now seen corresponding path program 19 times [2024-06-21 19:15:56,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:56,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733723282] [2024-06-21 19:15:56,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:56,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:57,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:57,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733723282] [2024-06-21 19:15:57,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733723282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:57,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:57,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:57,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705285362] [2024-06-21 19:15:57,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:57,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:57,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:57,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:57,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:57,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:57,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 218 transitions, 2583 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:57,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:57,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:57,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:57,843 INFO L124 PetriNetUnfolderBase]: 569/985 cut-off events. [2024-06-21 19:15:57,843 INFO L125 PetriNetUnfolderBase]: For 51785/51785 co-relation queries the response was YES. [2024-06-21 19:15:57,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7162 conditions, 985 events. 569/985 cut-off events. For 51785/51785 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4670 event pairs, 75 based on Foata normal form. 2/985 useless extension candidates. Maximal degree in co-relation 7069. Up to 892 conditions per place. [2024-06-21 19:15:57,851 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 196 selfloop transitions, 38 changer transitions 0/236 dead transitions. [2024-06-21 19:15:57,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 236 transitions, 3236 flow [2024-06-21 19:15:57,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:57,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 115 transitions. [2024-06-21 19:15:57,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4121863799283154 [2024-06-21 19:15:57,853 INFO L175 Difference]: Start difference. First operand has 220 places, 218 transitions, 2583 flow. Second operand 9 states and 115 transitions. [2024-06-21 19:15:57,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 236 transitions, 3236 flow [2024-06-21 19:15:57,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 236 transitions, 3171 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-21 19:15:57,974 INFO L231 Difference]: Finished difference. Result has 222 places, 220 transitions, 2628 flow [2024-06-21 19:15:57,974 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2518, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2628, PETRI_PLACES=222, PETRI_TRANSITIONS=220} [2024-06-21 19:15:57,974 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 192 predicate places. [2024-06-21 19:15:57,974 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 220 transitions, 2628 flow [2024-06-21 19:15:57,975 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:57,975 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:57,975 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:57,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 19:15:57,975 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)] === [2024-06-21 19:15:57,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:57,975 INFO L85 PathProgramCache]: Analyzing trace with hash -281277233, now seen corresponding path program 20 times [2024-06-21 19:15:57,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:57,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369030033] [2024-06-21 19:15:57,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:57,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:15:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:15:59,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:15:59,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369030033] [2024-06-21 19:15:59,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369030033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:15:59,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:15:59,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:15:59,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264447727] [2024-06-21 19:15:59,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:15:59,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:15:59,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:15:59,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:15:59,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:15:59,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:15:59,340 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 220 transitions, 2628 flow. Second operand has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:59,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:15:59,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:15:59,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:15:59,686 INFO L124 PetriNetUnfolderBase]: 570/987 cut-off events. [2024-06-21 19:15:59,687 INFO L125 PetriNetUnfolderBase]: For 52259/52259 co-relation queries the response was YES. [2024-06-21 19:15:59,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7186 conditions, 987 events. 570/987 cut-off events. For 52259/52259 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 4680 event pairs, 75 based on Foata normal form. 2/987 useless extension candidates. Maximal degree in co-relation 7092. Up to 895 conditions per place. [2024-06-21 19:15:59,695 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 197 selfloop transitions, 39 changer transitions 0/238 dead transitions. [2024-06-21 19:15:59,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 238 transitions, 3291 flow [2024-06-21 19:15:59,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:15:59,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:15:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 117 transitions. [2024-06-21 19:15:59,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:15:59,697 INFO L175 Difference]: Start difference. First operand has 222 places, 220 transitions, 2628 flow. Second operand 9 states and 117 transitions. [2024-06-21 19:15:59,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 238 transitions, 3291 flow [2024-06-21 19:15:59,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 238 transitions, 3099 flow, removed 26 selfloop flow, removed 12 redundant places. [2024-06-21 19:15:59,831 INFO L231 Difference]: Finished difference. Result has 219 places, 222 transitions, 2551 flow [2024-06-21 19:15:59,831 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2448, PETRI_DIFFERENCE_MINUEND_PLACES=210, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2551, PETRI_PLACES=219, PETRI_TRANSITIONS=222} [2024-06-21 19:15:59,832 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 189 predicate places. [2024-06-21 19:15:59,832 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 222 transitions, 2551 flow [2024-06-21 19:15:59,832 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.444444444444445) internal successors, (67), 9 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:15:59,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:15:59,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:15:59,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 19:15:59,833 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)] === [2024-06-21 19:15:59,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:15:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1253397289, now seen corresponding path program 1 times [2024-06-21 19:15:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:15:59,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455923759] [2024-06-21 19:15:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:15:59,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:15:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:01,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:01,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:01,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455923759] [2024-06-21 19:16:01,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455923759] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:01,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:01,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:01,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55540222] [2024-06-21 19:16:01,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:01,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:01,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:01,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:01,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:01,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:01,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 222 transitions, 2551 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) [2024-06-21 19:16:01,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:01,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:01,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:02,457 INFO L124 PetriNetUnfolderBase]: 586/1019 cut-off events. [2024-06-21 19:16:02,457 INFO L125 PetriNetUnfolderBase]: For 57210/57210 co-relation queries the response was YES. [2024-06-21 19:16:02,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7272 conditions, 1019 events. 586/1019 cut-off events. For 57210/57210 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 4918 event pairs, 110 based on Foata normal form. 2/1019 useless extension candidates. Maximal degree in co-relation 7182. Up to 952 conditions per place. [2024-06-21 19:16:02,465 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 224 selfloop transitions, 21 changer transitions 0/247 dead transitions. [2024-06-21 19:16:02,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 247 transitions, 3251 flow [2024-06-21 19:16:02,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:16:02,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:16:02,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 19:16:02,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-21 19:16:02,466 INFO L175 Difference]: Start difference. First operand has 219 places, 222 transitions, 2551 flow. Second operand 12 states and 131 transitions. [2024-06-21 19:16:02,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 247 transitions, 3251 flow [2024-06-21 19:16:02,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 247 transitions, 3180 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:02,602 INFO L231 Difference]: Finished difference. Result has 228 places, 228 transitions, 2592 flow [2024-06-21 19:16:02,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2480, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2592, PETRI_PLACES=228, PETRI_TRANSITIONS=228} [2024-06-21 19:16:02,603 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 198 predicate places. [2024-06-21 19:16:02,603 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 228 transitions, 2592 flow [2024-06-21 19:16:02,603 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) [2024-06-21 19:16:02,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:02,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:02,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 19:16:02,604 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)] === [2024-06-21 19:16:02,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:02,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1689310663, now seen corresponding path program 2 times [2024-06-21 19:16:02,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:02,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71477572] [2024-06-21 19:16:02,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:02,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:02,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:04,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:04,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:04,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71477572] [2024-06-21 19:16:04,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71477572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:04,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:04,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:04,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465966343] [2024-06-21 19:16:04,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:04,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:04,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:04,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:04,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:04,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:04,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 228 transitions, 2592 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) [2024-06-21 19:16:04,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:04,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:04,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:05,090 INFO L124 PetriNetUnfolderBase]: 593/1032 cut-off events. [2024-06-21 19:16:05,090 INFO L125 PetriNetUnfolderBase]: For 59402/59402 co-relation queries the response was YES. [2024-06-21 19:16:05,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7474 conditions, 1032 events. 593/1032 cut-off events. For 59402/59402 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5026 event pairs, 112 based on Foata normal form. 2/1032 useless extension candidates. Maximal degree in co-relation 7379. Up to 985 conditions per place. [2024-06-21 19:16:05,098 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 224 selfloop transitions, 21 changer transitions 0/247 dead transitions. [2024-06-21 19:16:05,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 247 transitions, 3164 flow [2024-06-21 19:16:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:16:05,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:16:05,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 19:16:05,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 19:16:05,101 INFO L175 Difference]: Start difference. First operand has 228 places, 228 transitions, 2592 flow. Second operand 12 states and 128 transitions. [2024-06-21 19:16:05,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 247 transitions, 3164 flow [2024-06-21 19:16:05,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 247 transitions, 3121 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:05,268 INFO L231 Difference]: Finished difference. Result has 234 places, 231 transitions, 2637 flow [2024-06-21 19:16:05,269 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2553, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2637, PETRI_PLACES=234, PETRI_TRANSITIONS=231} [2024-06-21 19:16:05,269 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 204 predicate places. [2024-06-21 19:16:05,269 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 231 transitions, 2637 flow [2024-06-21 19:16:05,269 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) [2024-06-21 19:16:05,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:05,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:05,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 19:16:05,270 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)] === [2024-06-21 19:16:05,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:05,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1250535369, now seen corresponding path program 1 times [2024-06-21 19:16:05,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:05,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433349087] [2024-06-21 19:16:05,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:05,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:07,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:07,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:07,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433349087] [2024-06-21 19:16:07,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433349087] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:07,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:07,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:07,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367373620] [2024-06-21 19:16:07,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:07,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:07,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:07,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:07,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:07,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:07,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 231 transitions, 2637 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) [2024-06-21 19:16:07,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:07,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:07,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:07,695 INFO L124 PetriNetUnfolderBase]: 615/1068 cut-off events. [2024-06-21 19:16:07,695 INFO L125 PetriNetUnfolderBase]: For 68624/68624 co-relation queries the response was YES. [2024-06-21 19:16:07,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7863 conditions, 1068 events. 615/1068 cut-off events. For 68624/68624 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5223 event pairs, 111 based on Foata normal form. 4/1070 useless extension candidates. Maximal degree in co-relation 7766. Up to 994 conditions per place. [2024-06-21 19:16:07,704 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 225 selfloop transitions, 25 changer transitions 0/252 dead transitions. [2024-06-21 19:16:07,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 252 transitions, 3391 flow [2024-06-21 19:16:07,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:07,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:07,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 19:16:07,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 19:16:07,705 INFO L175 Difference]: Start difference. First operand has 234 places, 231 transitions, 2637 flow. Second operand 10 states and 117 transitions. [2024-06-21 19:16:07,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 252 transitions, 3391 flow [2024-06-21 19:16:07,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 252 transitions, 3343 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:16:07,852 INFO L231 Difference]: Finished difference. Result has 235 places, 236 transitions, 2739 flow [2024-06-21 19:16:07,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2589, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2739, PETRI_PLACES=235, PETRI_TRANSITIONS=236} [2024-06-21 19:16:07,852 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 205 predicate places. [2024-06-21 19:16:07,853 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 236 transitions, 2739 flow [2024-06-21 19:16:07,853 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) [2024-06-21 19:16:07,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:07,853 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:07,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 19:16:07,853 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)] === [2024-06-21 19:16:07,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:07,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1250540329, now seen corresponding path program 3 times [2024-06-21 19:16:07,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:07,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162813039] [2024-06-21 19:16:07,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:07,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:10,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:10,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162813039] [2024-06-21 19:16:10,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162813039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:10,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:10,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:10,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766119216] [2024-06-21 19:16:10,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:10,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:10,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:10,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:10,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:10,124 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:10,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 236 transitions, 2739 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) [2024-06-21 19:16:10,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:10,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:10,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:10,686 INFO L124 PetriNetUnfolderBase]: 612/1063 cut-off events. [2024-06-21 19:16:10,686 INFO L125 PetriNetUnfolderBase]: For 64108/64108 co-relation queries the response was YES. [2024-06-21 19:16:10,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7866 conditions, 1063 events. 612/1063 cut-off events. For 64108/64108 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 5192 event pairs, 113 based on Foata normal form. 2/1063 useless extension candidates. Maximal degree in co-relation 7768. Up to 1016 conditions per place. [2024-06-21 19:16:10,695 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 227 selfloop transitions, 20 changer transitions 0/249 dead transitions. [2024-06-21 19:16:10,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 249 transitions, 3267 flow [2024-06-21 19:16:10,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:10,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:10,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 111 transitions. [2024-06-21 19:16:10,696 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3580645161290323 [2024-06-21 19:16:10,696 INFO L175 Difference]: Start difference. First operand has 235 places, 236 transitions, 2739 flow. Second operand 10 states and 111 transitions. [2024-06-21 19:16:10,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 249 transitions, 3267 flow [2024-06-21 19:16:10,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 249 transitions, 3180 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:10,851 INFO L231 Difference]: Finished difference. Result has 239 places, 236 transitions, 2696 flow [2024-06-21 19:16:10,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2652, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2696, PETRI_PLACES=239, PETRI_TRANSITIONS=236} [2024-06-21 19:16:10,851 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 209 predicate places. [2024-06-21 19:16:10,852 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 236 transitions, 2696 flow [2024-06-21 19:16:10,852 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) [2024-06-21 19:16:10,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:10,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:10,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 19:16:10,852 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)] === [2024-06-21 19:16:10,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:10,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1135244199, now seen corresponding path program 2 times [2024-06-21 19:16:10,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:10,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692809149] [2024-06-21 19:16:10,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:10,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:10,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:12,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:12,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692809149] [2024-06-21 19:16:12,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692809149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:12,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:12,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:12,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950606102] [2024-06-21 19:16:12,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:12,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:12,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:12,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:12,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:12,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:12,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 236 transitions, 2696 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) [2024-06-21 19:16:12,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:12,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:12,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:13,554 INFO L124 PetriNetUnfolderBase]: 674/1163 cut-off events. [2024-06-21 19:16:13,555 INFO L125 PetriNetUnfolderBase]: For 88972/88972 co-relation queries the response was YES. [2024-06-21 19:16:13,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9090 conditions, 1163 events. 674/1163 cut-off events. For 88972/88972 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 5753 event pairs, 121 based on Foata normal form. 4/1165 useless extension candidates. Maximal degree in co-relation 8990. Up to 696 conditions per place. [2024-06-21 19:16:13,564 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 193 selfloop transitions, 77 changer transitions 0/272 dead transitions. [2024-06-21 19:16:13,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 272 transitions, 4016 flow [2024-06-21 19:16:13,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 19:16:13,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 19:16:13,566 INFO L175 Difference]: Start difference. First operand has 239 places, 236 transitions, 2696 flow. Second operand 11 states and 145 transitions. [2024-06-21 19:16:13,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 272 transitions, 4016 flow [2024-06-21 19:16:13,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 272 transitions, 3974 flow, removed 2 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:13,759 INFO L231 Difference]: Finished difference. Result has 242 places, 245 transitions, 3006 flow [2024-06-21 19:16:13,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2654, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3006, PETRI_PLACES=242, PETRI_TRANSITIONS=245} [2024-06-21 19:16:13,760 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 212 predicate places. [2024-06-21 19:16:13,760 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 245 transitions, 3006 flow [2024-06-21 19:16:13,760 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) [2024-06-21 19:16:13,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:13,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:13,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 19:16:13,760 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)] === [2024-06-21 19:16:13,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:13,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1807582793, now seen corresponding path program 3 times [2024-06-21 19:16:13,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:13,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574433603] [2024-06-21 19:16:13,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:13,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:13,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:15,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:15,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574433603] [2024-06-21 19:16:15,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574433603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:15,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:15,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:15,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524495427] [2024-06-21 19:16:15,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:15,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:15,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:15,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:15,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:15,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:15,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 245 transitions, 3006 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) [2024-06-21 19:16:15,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:15,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:15,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:16,254 INFO L124 PetriNetUnfolderBase]: 680/1173 cut-off events. [2024-06-21 19:16:16,254 INFO L125 PetriNetUnfolderBase]: For 89771/89771 co-relation queries the response was YES. [2024-06-21 19:16:16,261 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9487 conditions, 1173 events. 680/1173 cut-off events. For 89771/89771 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 5852 event pairs, 111 based on Foata normal form. 2/1173 useless extension candidates. Maximal degree in co-relation 9386. Up to 859 conditions per place. [2024-06-21 19:16:16,265 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 221 selfloop transitions, 62 changer transitions 0/285 dead transitions. [2024-06-21 19:16:16,265 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 285 transitions, 4217 flow [2024-06-21 19:16:16,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:16,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 127 transitions. [2024-06-21 19:16:16,266 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4096774193548387 [2024-06-21 19:16:16,266 INFO L175 Difference]: Start difference. First operand has 242 places, 245 transitions, 3006 flow. Second operand 10 states and 127 transitions. [2024-06-21 19:16:16,266 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 285 transitions, 4217 flow [2024-06-21 19:16:16,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 285 transitions, 4020 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-21 19:16:16,481 INFO L231 Difference]: Finished difference. Result has 250 places, 261 transitions, 3275 flow [2024-06-21 19:16:16,481 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=237, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3275, PETRI_PLACES=250, PETRI_TRANSITIONS=261} [2024-06-21 19:16:16,481 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 220 predicate places. [2024-06-21 19:16:16,482 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 261 transitions, 3275 flow [2024-06-21 19:16:16,482 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) [2024-06-21 19:16:16,482 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:16,482 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:16,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 19:16:16,482 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)] === [2024-06-21 19:16:16,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:16,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1807576283, now seen corresponding path program 4 times [2024-06-21 19:16:16,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:16,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621984278] [2024-06-21 19:16:16,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:16,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:16,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:18,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:18,028 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621984278] [2024-06-21 19:16:18,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621984278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:18,028 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:18,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:18,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721337589] [2024-06-21 19:16:18,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:18,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:18,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:18,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:18,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:18,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:18,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 261 transitions, 3275 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) [2024-06-21 19:16:18,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:18,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:18,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:18,700 INFO L124 PetriNetUnfolderBase]: 702/1209 cut-off events. [2024-06-21 19:16:18,701 INFO L125 PetriNetUnfolderBase]: For 99251/99251 co-relation queries the response was YES. [2024-06-21 19:16:18,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10004 conditions, 1209 events. 702/1209 cut-off events. For 99251/99251 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 6039 event pairs, 141 based on Foata normal form. 4/1211 useless extension candidates. Maximal degree in co-relation 9898. Up to 819 conditions per place. [2024-06-21 19:16:18,712 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 205 selfloop transitions, 79 changer transitions 0/286 dead transitions. [2024-06-21 19:16:18,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 286 transitions, 4406 flow [2024-06-21 19:16:18,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:18,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:18,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 19:16:18,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-21 19:16:18,721 INFO L175 Difference]: Start difference. First operand has 250 places, 261 transitions, 3275 flow. Second operand 11 states and 140 transitions. [2024-06-21 19:16:18,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 286 transitions, 4406 flow [2024-06-21 19:16:18,917 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 286 transitions, 4295 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-21 19:16:18,921 INFO L231 Difference]: Finished difference. Result has 258 places, 266 transitions, 3491 flow [2024-06-21 19:16:18,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3176, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3491, PETRI_PLACES=258, PETRI_TRANSITIONS=266} [2024-06-21 19:16:18,922 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 228 predicate places. [2024-06-21 19:16:18,922 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 266 transitions, 3491 flow [2024-06-21 19:16:18,922 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) [2024-06-21 19:16:18,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:18,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:18,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 19:16:18,922 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)] === [2024-06-21 19:16:18,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:18,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1979471527, now seen corresponding path program 5 times [2024-06-21 19:16:18,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:18,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919128548] [2024-06-21 19:16:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:18,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:18,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:20,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:20,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919128548] [2024-06-21 19:16:20,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919128548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:20,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:20,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:20,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312238453] [2024-06-21 19:16:20,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:20,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:20,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:20,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:20,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:20,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:20,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 266 transitions, 3491 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) [2024-06-21 19:16:20,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:20,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:20,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:21,179 INFO L124 PetriNetUnfolderBase]: 734/1261 cut-off events. [2024-06-21 19:16:21,180 INFO L125 PetriNetUnfolderBase]: For 110444/110444 co-relation queries the response was YES. [2024-06-21 19:16:21,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10805 conditions, 1261 events. 734/1261 cut-off events. For 110444/110444 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6341 event pairs, 129 based on Foata normal form. 4/1263 useless extension candidates. Maximal degree in co-relation 10697. Up to 1109 conditions per place. [2024-06-21 19:16:21,192 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 245 selfloop transitions, 43 changer transitions 0/290 dead transitions. [2024-06-21 19:16:21,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 290 transitions, 4437 flow [2024-06-21 19:16:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:21,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 19:16:21,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 19:16:21,193 INFO L175 Difference]: Start difference. First operand has 258 places, 266 transitions, 3491 flow. Second operand 10 states and 124 transitions. [2024-06-21 19:16:21,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 290 transitions, 4437 flow [2024-06-21 19:16:21,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 290 transitions, 4277 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:21,467 INFO L231 Difference]: Finished difference. Result has 260 places, 273 transitions, 3617 flow [2024-06-21 19:16:21,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3337, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3617, PETRI_PLACES=260, PETRI_TRANSITIONS=273} [2024-06-21 19:16:21,468 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 230 predicate places. [2024-06-21 19:16:21,468 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 273 transitions, 3617 flow [2024-06-21 19:16:21,468 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) [2024-06-21 19:16:21,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:21,468 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:21,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 19:16:21,468 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)] === [2024-06-21 19:16:21,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:21,469 INFO L85 PathProgramCache]: Analyzing trace with hash 1979478037, now seen corresponding path program 6 times [2024-06-21 19:16:21,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:21,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199331473] [2024-06-21 19:16:21,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:21,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:23,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:23,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199331473] [2024-06-21 19:16:23,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199331473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:23,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:23,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:23,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732529401] [2024-06-21 19:16:23,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:23,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:23,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:23,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:23,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:23,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:23,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 273 transitions, 3617 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) [2024-06-21 19:16:23,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:23,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:23,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:24,280 INFO L124 PetriNetUnfolderBase]: 730/1255 cut-off events. [2024-06-21 19:16:24,281 INFO L125 PetriNetUnfolderBase]: For 105519/105519 co-relation queries the response was YES. [2024-06-21 19:16:24,288 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10626 conditions, 1255 events. 730/1255 cut-off events. For 105519/105519 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 6305 event pairs, 129 based on Foata normal form. 2/1255 useless extension candidates. Maximal degree in co-relation 10517. Up to 1108 conditions per place. [2024-06-21 19:16:24,292 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 246 selfloop transitions, 43 changer transitions 0/291 dead transitions. [2024-06-21 19:16:24,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 291 transitions, 4399 flow [2024-06-21 19:16:24,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:24,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:24,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 125 transitions. [2024-06-21 19:16:24,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 19:16:24,293 INFO L175 Difference]: Start difference. First operand has 260 places, 273 transitions, 3617 flow. Second operand 10 states and 125 transitions. [2024-06-21 19:16:24,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 291 transitions, 4399 flow [2024-06-21 19:16:24,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 291 transitions, 4202 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 19:16:24,515 INFO L231 Difference]: Finished difference. Result has 263 places, 274 transitions, 3528 flow [2024-06-21 19:16:24,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3420, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=230, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3528, PETRI_PLACES=263, PETRI_TRANSITIONS=274} [2024-06-21 19:16:24,516 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 233 predicate places. [2024-06-21 19:16:24,516 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 274 transitions, 3528 flow [2024-06-21 19:16:24,516 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) [2024-06-21 19:16:24,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:24,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:24,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 19:16:24,516 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)] === [2024-06-21 19:16:24,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:24,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1979717605, now seen corresponding path program 1 times [2024-06-21 19:16:24,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:24,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149638206] [2024-06-21 19:16:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:24,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:25,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:25,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149638206] [2024-06-21 19:16:25,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149638206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:25,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:25,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:25,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892082406] [2024-06-21 19:16:25,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:25,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:25,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:25,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:25,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:25,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:25,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 274 transitions, 3528 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) [2024-06-21 19:16:25,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:25,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:25,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:26,424 INFO L124 PetriNetUnfolderBase]: 734/1263 cut-off events. [2024-06-21 19:16:26,425 INFO L125 PetriNetUnfolderBase]: For 107010/107010 co-relation queries the response was YES. [2024-06-21 19:16:26,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10661 conditions, 1263 events. 734/1263 cut-off events. For 107010/107010 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6342 event pairs, 133 based on Foata normal form. 2/1263 useless extension candidates. Maximal degree in co-relation 10550. Up to 1192 conditions per place. [2024-06-21 19:16:26,438 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 257 selfloop transitions, 28 changer transitions 0/287 dead transitions. [2024-06-21 19:16:26,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 287 transitions, 4144 flow [2024-06-21 19:16:26,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:26,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:26,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 19:16:26,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 19:16:26,456 INFO L175 Difference]: Start difference. First operand has 263 places, 274 transitions, 3528 flow. Second operand 10 states and 112 transitions. [2024-06-21 19:16:26,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 287 transitions, 4144 flow [2024-06-21 19:16:26,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 287 transitions, 4046 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 19:16:26,748 INFO L231 Difference]: Finished difference. Result has 266 places, 275 transitions, 3506 flow [2024-06-21 19:16:26,748 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3430, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=274, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3506, PETRI_PLACES=266, PETRI_TRANSITIONS=275} [2024-06-21 19:16:26,748 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 236 predicate places. [2024-06-21 19:16:26,748 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 275 transitions, 3506 flow [2024-06-21 19:16:26,748 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) [2024-06-21 19:16:26,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:26,749 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:26,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 19:16:26,749 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)] === [2024-06-21 19:16:26,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:26,749 INFO L85 PathProgramCache]: Analyzing trace with hash -962938825, now seen corresponding path program 7 times [2024-06-21 19:16:26,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:26,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661356545] [2024-06-21 19:16:26,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:26,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:28,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:28,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:28,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661356545] [2024-06-21 19:16:28,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661356545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:28,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:28,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:28,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673464201] [2024-06-21 19:16:28,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:28,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:28,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:28,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:28,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:28,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:28,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 275 transitions, 3506 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) [2024-06-21 19:16:28,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:28,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:28,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:29,181 INFO L124 PetriNetUnfolderBase]: 726/1251 cut-off events. [2024-06-21 19:16:29,182 INFO L125 PetriNetUnfolderBase]: For 105665/105665 co-relation queries the response was YES. [2024-06-21 19:16:29,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10305 conditions, 1251 events. 726/1251 cut-off events. For 105665/105665 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 6294 event pairs, 132 based on Foata normal form. 4/1253 useless extension candidates. Maximal degree in co-relation 10193. Up to 1162 conditions per place. [2024-06-21 19:16:29,197 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 256 selfloop transitions, 32 changer transitions 0/290 dead transitions. [2024-06-21 19:16:29,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 290 transitions, 4139 flow [2024-06-21 19:16:29,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:29,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:29,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 19:16:29,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 19:16:29,199 INFO L175 Difference]: Start difference. First operand has 266 places, 275 transitions, 3506 flow. Second operand 10 states and 118 transitions. [2024-06-21 19:16:29,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 290 transitions, 4139 flow [2024-06-21 19:16:29,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 290 transitions, 4070 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:29,455 INFO L231 Difference]: Finished difference. Result has 268 places, 275 transitions, 3507 flow [2024-06-21 19:16:29,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3437, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3507, PETRI_PLACES=268, PETRI_TRANSITIONS=275} [2024-06-21 19:16:29,455 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 238 predicate places. [2024-06-21 19:16:29,455 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 275 transitions, 3507 flow [2024-06-21 19:16:29,456 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) [2024-06-21 19:16:29,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:29,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:29,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 19:16:29,456 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)] === [2024-06-21 19:16:29,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:29,456 INFO L85 PathProgramCache]: Analyzing trace with hash -969425575, now seen corresponding path program 8 times [2024-06-21 19:16:29,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:29,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60838820] [2024-06-21 19:16:29,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:29,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:29,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:31,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:31,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:31,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60838820] [2024-06-21 19:16:31,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60838820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:31,465 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:31,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:31,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299065770] [2024-06-21 19:16:31,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:31,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:31,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:31,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:31,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 275 transitions, 3507 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) [2024-06-21 19:16:31,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:31,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:31,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:32,353 INFO L124 PetriNetUnfolderBase]: 762/1309 cut-off events. [2024-06-21 19:16:32,354 INFO L125 PetriNetUnfolderBase]: For 120053/120053 co-relation queries the response was YES. [2024-06-21 19:16:32,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11239 conditions, 1309 events. 762/1309 cut-off events. For 120053/120053 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 6641 event pairs, 133 based on Foata normal form. 2/1309 useless extension candidates. Maximal degree in co-relation 11126. Up to 1091 conditions per place. [2024-06-21 19:16:32,366 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 247 selfloop transitions, 56 changer transitions 0/305 dead transitions. [2024-06-21 19:16:32,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 305 transitions, 4819 flow [2024-06-21 19:16:32,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:32,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:32,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 19:16:32,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 19:16:32,368 INFO L175 Difference]: Start difference. First operand has 268 places, 275 transitions, 3507 flow. Second operand 11 states and 139 transitions. [2024-06-21 19:16:32,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 305 transitions, 4819 flow [2024-06-21 19:16:32,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 305 transitions, 4664 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 19:16:32,683 INFO L231 Difference]: Finished difference. Result has 271 places, 283 transitions, 3694 flow [2024-06-21 19:16:32,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3694, PETRI_PLACES=271, PETRI_TRANSITIONS=283} [2024-06-21 19:16:32,684 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 241 predicate places. [2024-06-21 19:16:32,684 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 283 transitions, 3694 flow [2024-06-21 19:16:32,684 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) [2024-06-21 19:16:32,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:32,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:32,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 19:16:32,685 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)] === [2024-06-21 19:16:32,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:32,685 INFO L85 PathProgramCache]: Analyzing trace with hash -1474376147, now seen corresponding path program 9 times [2024-06-21 19:16:32,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:32,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150515471] [2024-06-21 19:16:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:32,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:32,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:34,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:34,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:34,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150515471] [2024-06-21 19:16:34,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150515471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:34,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:34,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:34,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715974788] [2024-06-21 19:16:34,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:34,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:34,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:34,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:34,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:34,289 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:34,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 283 transitions, 3694 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) [2024-06-21 19:16:34,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:34,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:34,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:34,870 INFO L124 PetriNetUnfolderBase]: 784/1345 cut-off events. [2024-06-21 19:16:34,870 INFO L125 PetriNetUnfolderBase]: For 133666/133666 co-relation queries the response was YES. [2024-06-21 19:16:34,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11787 conditions, 1345 events. 784/1345 cut-off events. For 133666/133666 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6842 event pairs, 138 based on Foata normal form. 4/1347 useless extension candidates. Maximal degree in co-relation 11673. Up to 1108 conditions per place. [2024-06-21 19:16:34,882 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 251 selfloop transitions, 59 changer transitions 0/312 dead transitions. [2024-06-21 19:16:34,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 312 transitions, 5015 flow [2024-06-21 19:16:34,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:34,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:34,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 134 transitions. [2024-06-21 19:16:34,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.432258064516129 [2024-06-21 19:16:34,890 INFO L175 Difference]: Start difference. First operand has 271 places, 283 transitions, 3694 flow. Second operand 10 states and 134 transitions. [2024-06-21 19:16:34,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 312 transitions, 5015 flow [2024-06-21 19:16:35,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 312 transitions, 4804 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-21 19:16:35,251 INFO L231 Difference]: Finished difference. Result has 274 places, 289 transitions, 3776 flow [2024-06-21 19:16:35,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3527, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3776, PETRI_PLACES=274, PETRI_TRANSITIONS=289} [2024-06-21 19:16:35,251 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 244 predicate places. [2024-06-21 19:16:35,251 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 289 transitions, 3776 flow [2024-06-21 19:16:35,252 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) [2024-06-21 19:16:35,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:35,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:35,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 19:16:35,252 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)] === [2024-06-21 19:16:35,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:35,252 INFO L85 PathProgramCache]: Analyzing trace with hash -969605065, now seen corresponding path program 10 times [2024-06-21 19:16:35,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:35,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473892824] [2024-06-21 19:16:35,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:35,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:35,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:36,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:36,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:36,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473892824] [2024-06-21 19:16:36,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473892824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:36,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:36,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:36,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681077516] [2024-06-21 19:16:36,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:36,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:36,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:36,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:36,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:36,892 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:36,892 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 289 transitions, 3776 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) [2024-06-21 19:16:36,892 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:36,892 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:36,892 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:37,428 INFO L124 PetriNetUnfolderBase]: 776/1333 cut-off events. [2024-06-21 19:16:37,428 INFO L125 PetriNetUnfolderBase]: For 126950/126950 co-relation queries the response was YES. [2024-06-21 19:16:37,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11324 conditions, 1333 events. 776/1333 cut-off events. For 126950/126950 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 6790 event pairs, 126 based on Foata normal form. 4/1335 useless extension candidates. Maximal degree in co-relation 11209. Up to 1104 conditions per place. [2024-06-21 19:16:37,442 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 246 selfloop transitions, 62 changer transitions 0/310 dead transitions. [2024-06-21 19:16:37,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 310 transitions, 4772 flow [2024-06-21 19:16:37,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:37,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 131 transitions. [2024-06-21 19:16:37,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42258064516129035 [2024-06-21 19:16:37,453 INFO L175 Difference]: Start difference. First operand has 274 places, 289 transitions, 3776 flow. Second operand 10 states and 131 transitions. [2024-06-21 19:16:37,453 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 310 transitions, 4772 flow [2024-06-21 19:16:37,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 310 transitions, 4585 flow, removed 47 selfloop flow, removed 6 redundant places. [2024-06-21 19:16:37,774 INFO L231 Difference]: Finished difference. Result has 278 places, 289 transitions, 3720 flow [2024-06-21 19:16:37,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3589, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3720, PETRI_PLACES=278, PETRI_TRANSITIONS=289} [2024-06-21 19:16:37,775 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 248 predicate places. [2024-06-21 19:16:37,775 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 289 transitions, 3720 flow [2024-06-21 19:16:37,775 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) [2024-06-21 19:16:37,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:37,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:37,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 19:16:37,775 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)] === [2024-06-21 19:16:37,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:37,776 INFO L85 PathProgramCache]: Analyzing trace with hash 157949595, now seen corresponding path program 11 times [2024-06-21 19:16:37,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:37,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007270370] [2024-06-21 19:16:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:37,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:37,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:39,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:39,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:39,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007270370] [2024-06-21 19:16:39,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007270370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:39,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:39,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:39,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233921164] [2024-06-21 19:16:39,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:39,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:39,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:39,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:39,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:39,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:39,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 289 transitions, 3720 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) [2024-06-21 19:16:39,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:39,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:39,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:40,402 INFO L124 PetriNetUnfolderBase]: 828/1417 cut-off events. [2024-06-21 19:16:40,402 INFO L125 PetriNetUnfolderBase]: For 150624/150624 co-relation queries the response was YES. [2024-06-21 19:16:40,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12575 conditions, 1417 events. 828/1417 cut-off events. For 150624/150624 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7278 event pairs, 144 based on Foata normal form. 4/1419 useless extension candidates. Maximal degree in co-relation 12459. Up to 1134 conditions per place. [2024-06-21 19:16:40,416 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 261 selfloop transitions, 57 changer transitions 0/320 dead transitions. [2024-06-21 19:16:40,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 320 transitions, 5165 flow [2024-06-21 19:16:40,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:40,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 19:16:40,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 19:16:40,417 INFO L175 Difference]: Start difference. First operand has 278 places, 289 transitions, 3720 flow. Second operand 11 states and 134 transitions. [2024-06-21 19:16:40,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 320 transitions, 5165 flow [2024-06-21 19:16:40,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 320 transitions, 5020 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:16:40,840 INFO L231 Difference]: Finished difference. Result has 280 places, 299 transitions, 3968 flow [2024-06-21 19:16:40,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3575, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=241, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3968, PETRI_PLACES=280, PETRI_TRANSITIONS=299} [2024-06-21 19:16:40,840 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 250 predicate places. [2024-06-21 19:16:40,840 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 299 transitions, 3968 flow [2024-06-21 19:16:40,841 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) [2024-06-21 19:16:40,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:40,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:40,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 19:16:40,841 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)] === [2024-06-21 19:16:40,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:40,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1584601467, now seen corresponding path program 12 times [2024-06-21 19:16:40,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:40,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508869961] [2024-06-21 19:16:40,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:40,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:42,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:42,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508869961] [2024-06-21 19:16:42,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508869961] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:42,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:42,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:42,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253895197] [2024-06-21 19:16:42,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:42,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:42,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:42,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:42,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:42,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:42,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 299 transitions, 3968 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) [2024-06-21 19:16:42,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:42,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:42,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:43,521 INFO L124 PetriNetUnfolderBase]: 834/1427 cut-off events. [2024-06-21 19:16:43,521 INFO L125 PetriNetUnfolderBase]: For 149665/149665 co-relation queries the response was YES. [2024-06-21 19:16:43,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12748 conditions, 1427 events. 834/1427 cut-off events. For 149665/149665 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 7323 event pairs, 145 based on Foata normal form. 2/1427 useless extension candidates. Maximal degree in co-relation 12631. Up to 1142 conditions per place. [2024-06-21 19:16:43,536 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 259 selfloop transitions, 62 changer transitions 0/323 dead transitions. [2024-06-21 19:16:43,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 323 transitions, 5238 flow [2024-06-21 19:16:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:43,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:43,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 19:16:43,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 19:16:43,537 INFO L175 Difference]: Start difference. First operand has 280 places, 299 transitions, 3968 flow. Second operand 11 states and 133 transitions. [2024-06-21 19:16:43,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 323 transitions, 5238 flow [2024-06-21 19:16:43,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 323 transitions, 4977 flow, removed 70 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:43,983 INFO L231 Difference]: Finished difference. Result has 284 places, 303 transitions, 3953 flow [2024-06-21 19:16:43,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3721, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3953, PETRI_PLACES=284, PETRI_TRANSITIONS=303} [2024-06-21 19:16:43,983 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 254 predicate places. [2024-06-21 19:16:43,983 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 303 transitions, 3953 flow [2024-06-21 19:16:43,984 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) [2024-06-21 19:16:43,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:43,984 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:43,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 19:16:43,984 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)] === [2024-06-21 19:16:43,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:43,984 INFO L85 PathProgramCache]: Analyzing trace with hash -933597211, now seen corresponding path program 2 times [2024-06-21 19:16:43,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:43,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008123187] [2024-06-21 19:16:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:43,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:43,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:45,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:45,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008123187] [2024-06-21 19:16:45,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008123187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:45,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:45,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:45,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044290484] [2024-06-21 19:16:45,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:45,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:45,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:45,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:45,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:45,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:45,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 303 transitions, 3953 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) [2024-06-21 19:16:45,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:45,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:45,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:45,620 INFO L124 PetriNetUnfolderBase]: 838/1435 cut-off events. [2024-06-21 19:16:45,621 INFO L125 PetriNetUnfolderBase]: For 154670/154670 co-relation queries the response was YES. [2024-06-21 19:16:45,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12630 conditions, 1435 events. 838/1435 cut-off events. For 154670/154670 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 7394 event pairs, 164 based on Foata normal form. 2/1435 useless extension candidates. Maximal degree in co-relation 12513. Up to 1397 conditions per place. [2024-06-21 19:16:45,634 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 297 selfloop transitions, 16 changer transitions 0/315 dead transitions. [2024-06-21 19:16:45,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 315 transitions, 4619 flow [2024-06-21 19:16:45,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:45,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:45,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 111 transitions. [2024-06-21 19:16:45,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3255131964809384 [2024-06-21 19:16:45,635 INFO L175 Difference]: Start difference. First operand has 284 places, 303 transitions, 3953 flow. Second operand 11 states and 111 transitions. [2024-06-21 19:16:45,635 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 315 transitions, 4619 flow [2024-06-21 19:16:46,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 315 transitions, 4472 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-21 19:16:46,050 INFO L231 Difference]: Finished difference. Result has 288 places, 304 transitions, 3860 flow [2024-06-21 19:16:46,050 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3860, PETRI_PLACES=288, PETRI_TRANSITIONS=304} [2024-06-21 19:16:46,050 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 258 predicate places. [2024-06-21 19:16:46,050 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 304 transitions, 3860 flow [2024-06-21 19:16:46,050 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) [2024-06-21 19:16:46,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:46,051 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:46,051 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 19:16:46,051 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)] === [2024-06-21 19:16:46,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1465110763, now seen corresponding path program 13 times [2024-06-21 19:16:46,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:46,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447754330] [2024-06-21 19:16:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:46,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:47,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:47,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447754330] [2024-06-21 19:16:47,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447754330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:47,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:47,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:47,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515861074] [2024-06-21 19:16:47,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:47,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:47,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:47,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:47,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:47,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:47,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 304 transitions, 3860 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) [2024-06-21 19:16:47,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:47,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:47,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:48,624 INFO L124 PetriNetUnfolderBase]: 890/1519 cut-off events. [2024-06-21 19:16:48,624 INFO L125 PetriNetUnfolderBase]: For 183587/183587 co-relation queries the response was YES. [2024-06-21 19:16:48,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13781 conditions, 1519 events. 890/1519 cut-off events. For 183587/183587 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 7865 event pairs, 164 based on Foata normal form. 4/1521 useless extension candidates. Maximal degree in co-relation 13663. Up to 1367 conditions per place. [2024-06-21 19:16:48,640 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 286 selfloop transitions, 42 changer transitions 0/330 dead transitions. [2024-06-21 19:16:48,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 298 places, 330 transitions, 5117 flow [2024-06-21 19:16:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:16:48,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:16:48,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 19:16:48,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 19:16:48,641 INFO L175 Difference]: Start difference. First operand has 288 places, 304 transitions, 3860 flow. Second operand 11 states and 124 transitions. [2024-06-21 19:16:48,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 298 places, 330 transitions, 5117 flow [2024-06-21 19:16:49,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 330 transitions, 5073 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 19:16:49,148 INFO L231 Difference]: Finished difference. Result has 291 places, 314 transitions, 4181 flow [2024-06-21 19:16:49,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=3816, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4181, PETRI_PLACES=291, PETRI_TRANSITIONS=314} [2024-06-21 19:16:49,149 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 261 predicate places. [2024-06-21 19:16:49,149 INFO L495 AbstractCegarLoop]: Abstraction has has 291 places, 314 transitions, 4181 flow [2024-06-21 19:16:49,149 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) [2024-06-21 19:16:49,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:49,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:49,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 19:16:49,149 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)] === [2024-06-21 19:16:49,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:49,150 INFO L85 PathProgramCache]: Analyzing trace with hash -933953401, now seen corresponding path program 3 times [2024-06-21 19:16:49,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:49,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265648938] [2024-06-21 19:16:49,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:49,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:50,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:50,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265648938] [2024-06-21 19:16:50,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265648938] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:50,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:50,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:50,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740246628] [2024-06-21 19:16:50,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:50,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:50,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:50,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:50,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:50,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:50,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 291 places, 314 transitions, 4181 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) [2024-06-21 19:16:50,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:50,237 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:50,237 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:50,836 INFO L124 PetriNetUnfolderBase]: 894/1527 cut-off events. [2024-06-21 19:16:50,837 INFO L125 PetriNetUnfolderBase]: For 183294/183294 co-relation queries the response was YES. [2024-06-21 19:16:50,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14066 conditions, 1527 events. 894/1527 cut-off events. For 183294/183294 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 7951 event pairs, 180 based on Foata normal form. 2/1527 useless extension candidates. Maximal degree in co-relation 13946. Up to 1486 conditions per place. [2024-06-21 19:16:50,854 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 303 selfloop transitions, 19 changer transitions 0/324 dead transitions. [2024-06-21 19:16:50,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 324 transitions, 4863 flow [2024-06-21 19:16:50,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:50,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:50,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 105 transitions. [2024-06-21 19:16:50,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 19:16:50,855 INFO L175 Difference]: Start difference. First operand has 291 places, 314 transitions, 4181 flow. Second operand 10 states and 105 transitions. [2024-06-21 19:16:50,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 324 transitions, 4863 flow [2024-06-21 19:16:51,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 324 transitions, 4732 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-21 19:16:51,597 INFO L231 Difference]: Finished difference. Result has 294 places, 315 transitions, 4113 flow [2024-06-21 19:16:51,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4050, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4113, PETRI_PLACES=294, PETRI_TRANSITIONS=315} [2024-06-21 19:16:51,597 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 264 predicate places. [2024-06-21 19:16:51,597 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 315 transitions, 4113 flow [2024-06-21 19:16:51,598 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) [2024-06-21 19:16:51,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:51,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:51,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 19:16:51,598 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)] === [2024-06-21 19:16:51,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:51,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1229172601, now seen corresponding path program 4 times [2024-06-21 19:16:51,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:51,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259429081] [2024-06-21 19:16:51,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:51,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:53,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:53,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259429081] [2024-06-21 19:16:53,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259429081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:53,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:53,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:53,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391892723] [2024-06-21 19:16:53,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:53,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:53,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:53,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:53,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:53,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:53,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 315 transitions, 4113 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) [2024-06-21 19:16:53,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:53,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:53,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:53,693 INFO L124 PetriNetUnfolderBase]: 898/1535 cut-off events. [2024-06-21 19:16:53,693 INFO L125 PetriNetUnfolderBase]: For 188375/188375 co-relation queries the response was YES. [2024-06-21 19:16:53,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14076 conditions, 1535 events. 898/1535 cut-off events. For 188375/188375 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 8002 event pairs, 178 based on Foata normal form. 2/1535 useless extension candidates. Maximal degree in co-relation 13954. Up to 1493 conditions per place. [2024-06-21 19:16:53,709 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 305 selfloop transitions, 19 changer transitions 0/326 dead transitions. [2024-06-21 19:16:53,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 326 transitions, 4805 flow [2024-06-21 19:16:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:53,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:53,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 107 transitions. [2024-06-21 19:16:53,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34516129032258064 [2024-06-21 19:16:53,710 INFO L175 Difference]: Start difference. First operand has 294 places, 315 transitions, 4113 flow. Second operand 10 states and 107 transitions. [2024-06-21 19:16:53,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 326 transitions, 4805 flow [2024-06-21 19:16:54,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 326 transitions, 4754 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:54,316 INFO L231 Difference]: Finished difference. Result has 296 places, 316 transitions, 4126 flow [2024-06-21 19:16:54,317 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4062, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=315, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4126, PETRI_PLACES=296, PETRI_TRANSITIONS=316} [2024-06-21 19:16:54,317 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 266 predicate places. [2024-06-21 19:16:54,318 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 316 transitions, 4126 flow [2024-06-21 19:16:54,318 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) [2024-06-21 19:16:54,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:54,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:54,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 19:16:54,318 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)] === [2024-06-21 19:16:54,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:54,318 INFO L85 PathProgramCache]: Analyzing trace with hash -1229181529, now seen corresponding path program 14 times [2024-06-21 19:16:54,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:54,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58272179] [2024-06-21 19:16:54,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:54,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:56,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:56,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:56,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58272179] [2024-06-21 19:16:56,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58272179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:56,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:56,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:16:56,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169463068] [2024-06-21 19:16:56,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:56,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:16:56,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:56,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:16:56,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:16:56,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:56,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 316 transitions, 4126 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) [2024-06-21 19:16:56,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:56,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:56,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:56,782 INFO L124 PetriNetUnfolderBase]: 899/1537 cut-off events. [2024-06-21 19:16:56,782 INFO L125 PetriNetUnfolderBase]: For 190036/190036 co-relation queries the response was YES. [2024-06-21 19:16:56,795 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14095 conditions, 1537 events. 899/1537 cut-off events. For 190036/190036 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 8026 event pairs, 172 based on Foata normal form. 2/1537 useless extension candidates. Maximal degree in co-relation 13972. Up to 1485 conditions per place. [2024-06-21 19:16:56,800 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 306 selfloop transitions, 22 changer transitions 0/330 dead transitions. [2024-06-21 19:16:56,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 330 transitions, 4873 flow [2024-06-21 19:16:56,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:16:56,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:16:56,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 112 transitions. [2024-06-21 19:16:56,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36129032258064514 [2024-06-21 19:16:56,802 INFO L175 Difference]: Start difference. First operand has 296 places, 316 transitions, 4126 flow. Second operand 10 states and 112 transitions. [2024-06-21 19:16:56,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 330 transitions, 4873 flow [2024-06-21 19:16:57,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 330 transitions, 4819 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 19:16:57,477 INFO L231 Difference]: Finished difference. Result has 298 places, 318 transitions, 4184 flow [2024-06-21 19:16:57,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4072, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=316, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4184, PETRI_PLACES=298, PETRI_TRANSITIONS=318} [2024-06-21 19:16:57,477 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 268 predicate places. [2024-06-21 19:16:57,477 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 318 transitions, 4184 flow [2024-06-21 19:16:57,478 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) [2024-06-21 19:16:57,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:16:57,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:16:57,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 19:16:57,478 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)] === [2024-06-21 19:16:57,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:16:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash 2097100455, now seen corresponding path program 15 times [2024-06-21 19:16:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:16:57,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508478316] [2024-06-21 19:16:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:16:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:16:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:16:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:16:59,189 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:16:59,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508478316] [2024-06-21 19:16:59,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508478316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:16:59,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:16:59,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:16:59,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625973193] [2024-06-21 19:16:59,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:16:59,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:16:59,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:16:59,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:16:59,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:16:59,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:16:59,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 318 transitions, 4184 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) [2024-06-21 19:16:59,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:16:59,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:16:59,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:16:59,994 INFO L124 PetriNetUnfolderBase]: 891/1525 cut-off events. [2024-06-21 19:16:59,994 INFO L125 PetriNetUnfolderBase]: For 188947/188947 co-relation queries the response was YES. [2024-06-21 19:17:00,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13797 conditions, 1525 events. 891/1525 cut-off events. For 188947/188947 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7961 event pairs, 142 based on Foata normal form. 4/1527 useless extension candidates. Maximal degree in co-relation 13673. Up to 1196 conditions per place. [2024-06-21 19:17:00,013 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 258 selfloop transitions, 78 changer transitions 0/338 dead transitions. [2024-06-21 19:17:00,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 338 transitions, 5436 flow [2024-06-21 19:17:00,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:00,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:00,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 19:17:00,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:17:00,014 INFO L175 Difference]: Start difference. First operand has 298 places, 318 transitions, 4184 flow. Second operand 11 states and 132 transitions. [2024-06-21 19:17:00,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 338 transitions, 5436 flow [2024-06-21 19:17:00,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 338 transitions, 5309 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-21 19:17:00,628 INFO L231 Difference]: Finished difference. Result has 301 places, 318 transitions, 4220 flow [2024-06-21 19:17:00,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4220, PETRI_PLACES=301, PETRI_TRANSITIONS=318} [2024-06-21 19:17:00,628 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 271 predicate places. [2024-06-21 19:17:00,628 INFO L495 AbstractCegarLoop]: Abstraction has has 301 places, 318 transitions, 4220 flow [2024-06-21 19:17:00,628 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) [2024-06-21 19:17:00,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:00,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:00,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 19:17:00,629 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)] === [2024-06-21 19:17:00,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash -933953711, now seen corresponding path program 1 times [2024-06-21 19:17:00,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:00,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331180217] [2024-06-21 19:17:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:00,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:02,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:02,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:02,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331180217] [2024-06-21 19:17:02,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331180217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:02,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:02,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:02,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042479451] [2024-06-21 19:17:02,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:02,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:02,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:02,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:02,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:02,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:02,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 301 places, 318 transitions, 4220 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) [2024-06-21 19:17:02,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:02,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:02,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:02,835 INFO L124 PetriNetUnfolderBase]: 887/1519 cut-off events. [2024-06-21 19:17:02,835 INFO L125 PetriNetUnfolderBase]: For 183395/183395 co-relation queries the response was YES. [2024-06-21 19:17:02,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13698 conditions, 1519 events. 887/1519 cut-off events. For 183395/183395 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7926 event pairs, 172 based on Foata normal form. 2/1519 useless extension candidates. Maximal degree in co-relation 13573. Up to 1474 conditions per place. [2024-06-21 19:17:02,850 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 301 selfloop transitions, 25 changer transitions 0/328 dead transitions. [2024-06-21 19:17:02,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 328 transitions, 4938 flow [2024-06-21 19:17:02,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:02,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:02,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 106 transitions. [2024-06-21 19:17:02,851 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3419354838709677 [2024-06-21 19:17:02,851 INFO L175 Difference]: Start difference. First operand has 301 places, 318 transitions, 4220 flow. Second operand 10 states and 106 transitions. [2024-06-21 19:17:02,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 328 transitions, 4938 flow [2024-06-21 19:17:03,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 328 transitions, 4784 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 19:17:03,394 INFO L231 Difference]: Finished difference. Result has 302 places, 320 transitions, 4180 flow [2024-06-21 19:17:03,394 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4066, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=318, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=293, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4180, PETRI_PLACES=302, PETRI_TRANSITIONS=320} [2024-06-21 19:17:03,395 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 272 predicate places. [2024-06-21 19:17:03,395 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 320 transitions, 4180 flow [2024-06-21 19:17:03,395 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) [2024-06-21 19:17:03,395 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:03,395 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:03,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 19:17:03,396 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)] === [2024-06-21 19:17:03,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:03,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1229412169, now seen corresponding path program 16 times [2024-06-21 19:17:03,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:03,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199352364] [2024-06-21 19:17:03,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:03,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:03,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:05,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:05,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199352364] [2024-06-21 19:17:05,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199352364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:05,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:05,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:05,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41285281] [2024-06-21 19:17:05,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:05,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:05,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:05,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:05,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:05,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:05,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 320 transitions, 4180 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) [2024-06-21 19:17:05,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:05,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:05,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:05,970 INFO L124 PetriNetUnfolderBase]: 883/1513 cut-off events. [2024-06-21 19:17:05,970 INFO L125 PetriNetUnfolderBase]: For 180685/180685 co-relation queries the response was YES. [2024-06-21 19:17:05,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13402 conditions, 1513 events. 883/1513 cut-off events. For 180685/180685 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7896 event pairs, 162 based on Foata normal form. 2/1513 useless extension candidates. Maximal degree in co-relation 13276. Up to 1414 conditions per place. [2024-06-21 19:17:05,993 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 301 selfloop transitions, 32 changer transitions 0/335 dead transitions. [2024-06-21 19:17:05,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 335 transitions, 5100 flow [2024-06-21 19:17:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:05,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:05,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 117 transitions. [2024-06-21 19:17:05,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3774193548387097 [2024-06-21 19:17:05,994 INFO L175 Difference]: Start difference. First operand has 302 places, 320 transitions, 4180 flow. Second operand 10 states and 117 transitions. [2024-06-21 19:17:05,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 335 transitions, 5100 flow [2024-06-21 19:17:06,635 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 335 transitions, 4985 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 19:17:06,639 INFO L231 Difference]: Finished difference. Result has 303 places, 321 transitions, 4167 flow [2024-06-21 19:17:06,640 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4065, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4167, PETRI_PLACES=303, PETRI_TRANSITIONS=321} [2024-06-21 19:17:06,640 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 273 predicate places. [2024-06-21 19:17:06,640 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 321 transitions, 4167 flow [2024-06-21 19:17:06,640 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) [2024-06-21 19:17:06,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:06,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:06,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 19:17:06,641 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)] === [2024-06-21 19:17:06,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:06,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1591097145, now seen corresponding path program 5 times [2024-06-21 19:17:06,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:06,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885306586] [2024-06-21 19:17:06,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:06,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:06,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:08,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:08,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:08,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885306586] [2024-06-21 19:17:08,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885306586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:08,034 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:08,034 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:08,034 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277695463] [2024-06-21 19:17:08,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:08,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:08,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:08,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:08,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:08,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:08,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 321 transitions, 4167 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) [2024-06-21 19:17:08,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:08,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:08,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:08,588 INFO L124 PetriNetUnfolderBase]: 887/1521 cut-off events. [2024-06-21 19:17:08,589 INFO L125 PetriNetUnfolderBase]: For 184653/184653 co-relation queries the response was YES. [2024-06-21 19:17:08,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13499 conditions, 1521 events. 887/1521 cut-off events. For 184653/184653 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7951 event pairs, 167 based on Foata normal form. 2/1521 useless extension candidates. Maximal degree in co-relation 13373. Up to 1467 conditions per place. [2024-06-21 19:17:08,604 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 308 selfloop transitions, 23 changer transitions 0/333 dead transitions. [2024-06-21 19:17:08,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 333 transitions, 4879 flow [2024-06-21 19:17:08,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:17:08,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:17:08,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 19:17:08,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-21 19:17:08,605 INFO L175 Difference]: Start difference. First operand has 303 places, 321 transitions, 4167 flow. Second operand 10 states and 109 transitions. [2024-06-21 19:17:08,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 333 transitions, 4879 flow [2024-06-21 19:17:09,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 333 transitions, 4785 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-21 19:17:09,147 INFO L231 Difference]: Finished difference. Result has 306 places, 322 transitions, 4147 flow [2024-06-21 19:17:09,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4073, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4147, PETRI_PLACES=306, PETRI_TRANSITIONS=322} [2024-06-21 19:17:09,147 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 276 predicate places. [2024-06-21 19:17:09,148 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 322 transitions, 4147 flow [2024-06-21 19:17:09,148 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) [2024-06-21 19:17:09,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:09,148 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:09,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 19:17:09,148 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)] === [2024-06-21 19:17:09,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:09,149 INFO L85 PathProgramCache]: Analyzing trace with hash 1591088217, now seen corresponding path program 17 times [2024-06-21 19:17:09,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:09,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036145016] [2024-06-21 19:17:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:09,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:10,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:10,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:10,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036145016] [2024-06-21 19:17:10,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036145016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:10,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:10,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:10,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776564413] [2024-06-21 19:17:10,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:10,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:10,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:10,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:10,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:11,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:11,077 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 322 transitions, 4147 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) [2024-06-21 19:17:11,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:11,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:11,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:11,611 INFO L124 PetriNetUnfolderBase]: 883/1515 cut-off events. [2024-06-21 19:17:11,612 INFO L125 PetriNetUnfolderBase]: For 184302/184302 co-relation queries the response was YES. [2024-06-21 19:17:11,622 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13258 conditions, 1515 events. 883/1515 cut-off events. For 184302/184302 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 7946 event pairs, 160 based on Foata normal form. 2/1515 useless extension candidates. Maximal degree in co-relation 13131. Up to 1451 conditions per place. [2024-06-21 19:17:11,627 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 308 selfloop transitions, 26 changer transitions 0/336 dead transitions. [2024-06-21 19:17:11,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 336 transitions, 4884 flow [2024-06-21 19:17:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:11,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:11,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 120 transitions. [2024-06-21 19:17:11,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3519061583577713 [2024-06-21 19:17:11,628 INFO L175 Difference]: Start difference. First operand has 306 places, 322 transitions, 4147 flow. Second operand 11 states and 120 transitions. [2024-06-21 19:17:11,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 336 transitions, 4884 flow [2024-06-21 19:17:12,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 336 transitions, 4820 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-21 19:17:12,196 INFO L231 Difference]: Finished difference. Result has 309 places, 323 transitions, 4175 flow [2024-06-21 19:17:12,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4083, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=296, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4175, PETRI_PLACES=309, PETRI_TRANSITIONS=323} [2024-06-21 19:17:12,197 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 279 predicate places. [2024-06-21 19:17:12,197 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 323 transitions, 4175 flow [2024-06-21 19:17:12,197 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) [2024-06-21 19:17:12,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:12,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:12,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 19:17:12,198 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)] === [2024-06-21 19:17:12,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:12,199 INFO L85 PathProgramCache]: Analyzing trace with hash -590993387, now seen corresponding path program 18 times [2024-06-21 19:17:12,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:12,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487037986] [2024-06-21 19:17:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:12,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:13,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:13,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:13,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487037986] [2024-06-21 19:17:13,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487037986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:13,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:13,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:13,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78071028] [2024-06-21 19:17:13,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:13,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:13,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:13,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:13,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:14,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:14,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 323 transitions, 4175 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) [2024-06-21 19:17:14,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:14,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:14,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:14,825 INFO L124 PetriNetUnfolderBase]: 899/1541 cut-off events. [2024-06-21 19:17:14,826 INFO L125 PetriNetUnfolderBase]: For 196556/196556 co-relation queries the response was YES. [2024-06-21 19:17:14,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13716 conditions, 1541 events. 899/1541 cut-off events. For 196556/196556 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 8112 event pairs, 154 based on Foata normal form. 2/1541 useless extension candidates. Maximal degree in co-relation 13588. Up to 1408 conditions per place. [2024-06-21 19:17:14,842 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 305 selfloop transitions, 38 changer transitions 0/345 dead transitions. [2024-06-21 19:17:14,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 345 transitions, 5417 flow [2024-06-21 19:17:14,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:14,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:14,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 19:17:14,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 19:17:14,845 INFO L175 Difference]: Start difference. First operand has 309 places, 323 transitions, 4175 flow. Second operand 11 states and 129 transitions. [2024-06-21 19:17:14,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 345 transitions, 5417 flow [2024-06-21 19:17:15,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 345 transitions, 5322 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-21 19:17:15,489 INFO L231 Difference]: Finished difference. Result has 312 places, 328 transitions, 4322 flow [2024-06-21 19:17:15,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4080, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4322, PETRI_PLACES=312, PETRI_TRANSITIONS=328} [2024-06-21 19:17:15,490 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 282 predicate places. [2024-06-21 19:17:15,490 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 328 transitions, 4322 flow [2024-06-21 19:17:15,491 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) [2024-06-21 19:17:15,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:15,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:15,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 19:17:15,492 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)] === [2024-06-21 19:17:15,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:15,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1590851067, now seen corresponding path program 19 times [2024-06-21 19:17:15,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:15,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966010034] [2024-06-21 19:17:15,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:15,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:15,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:16,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:16,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966010034] [2024-06-21 19:17:16,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966010034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:16,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:16,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:16,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608692900] [2024-06-21 19:17:16,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:16,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:16,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:16,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:17,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:17,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 328 transitions, 4322 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) [2024-06-21 19:17:17,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:17,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:17,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:17,861 INFO L124 PetriNetUnfolderBase]: 891/1529 cut-off events. [2024-06-21 19:17:17,862 INFO L125 PetriNetUnfolderBase]: For 195253/195253 co-relation queries the response was YES. [2024-06-21 19:17:17,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13383 conditions, 1529 events. 891/1529 cut-off events. For 195253/195253 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 8039 event pairs, 151 based on Foata normal form. 4/1531 useless extension candidates. Maximal degree in co-relation 13253. Up to 1404 conditions per place. [2024-06-21 19:17:17,877 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 304 selfloop transitions, 38 changer transitions 0/344 dead transitions. [2024-06-21 19:17:17,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 344 transitions, 5253 flow [2024-06-21 19:17:17,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 19:17:17,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 19:17:17,879 INFO L175 Difference]: Start difference. First operand has 312 places, 328 transitions, 4322 flow. Second operand 11 states and 127 transitions. [2024-06-21 19:17:17,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 344 transitions, 5253 flow [2024-06-21 19:17:18,546 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 344 transitions, 4966 flow, removed 75 selfloop flow, removed 10 redundant places. [2024-06-21 19:17:18,551 INFO L231 Difference]: Finished difference. Result has 313 places, 328 transitions, 4118 flow [2024-06-21 19:17:18,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=290, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4118, PETRI_PLACES=313, PETRI_TRANSITIONS=328} [2024-06-21 19:17:18,552 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 283 predicate places. [2024-06-21 19:17:18,552 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 328 transitions, 4118 flow [2024-06-21 19:17:18,552 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) [2024-06-21 19:17:18,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:18,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:18,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 19:17:18,553 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)] === [2024-06-21 19:17:18,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:18,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1282506673, now seen corresponding path program 4 times [2024-06-21 19:17:18,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:18,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327764314] [2024-06-21 19:17:18,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:18,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:19,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:19,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:19,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327764314] [2024-06-21 19:17:19,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327764314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:19,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:19,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:17:19,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406737650] [2024-06-21 19:17:19,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:19,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:17:19,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:19,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:17:19,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:17:19,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:19,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 328 transitions, 4118 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:19,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:19,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:19,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:20,018 INFO L124 PetriNetUnfolderBase]: 907/1563 cut-off events. [2024-06-21 19:17:20,019 INFO L125 PetriNetUnfolderBase]: For 199007/199007 co-relation queries the response was YES. [2024-06-21 19:17:20,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13413 conditions, 1563 events. 907/1563 cut-off events. For 199007/199007 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 8333 event pairs, 112 based on Foata normal form. 2/1563 useless extension candidates. Maximal degree in co-relation 13284. Up to 1414 conditions per place. [2024-06-21 19:17:20,033 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 310 selfloop transitions, 48 changer transitions 0/360 dead transitions. [2024-06-21 19:17:20,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 360 transitions, 5138 flow [2024-06-21 19:17:20,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:17:20,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:17:20,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 159 transitions. [2024-06-21 19:17:20,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3663594470046083 [2024-06-21 19:17:20,034 INFO L175 Difference]: Start difference. First operand has 313 places, 328 transitions, 4118 flow. Second operand 14 states and 159 transitions. [2024-06-21 19:17:20,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 360 transitions, 5138 flow [2024-06-21 19:17:20,706 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 316 places, 360 transitions, 5025 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 19:17:20,710 INFO L231 Difference]: Finished difference. Result has 318 places, 331 transitions, 4147 flow [2024-06-21 19:17:20,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4005, PETRI_DIFFERENCE_MINUEND_PLACES=303, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=328, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=4147, PETRI_PLACES=318, PETRI_TRANSITIONS=331} [2024-06-21 19:17:20,711 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 288 predicate places. [2024-06-21 19:17:20,711 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 331 transitions, 4147 flow [2024-06-21 19:17:20,711 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:20,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:20,711 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:20,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 19:17:20,712 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)] === [2024-06-21 19:17:20,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:20,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1282446223, now seen corresponding path program 5 times [2024-06-21 19:17:20,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:20,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32955765] [2024-06-21 19:17:20,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:20,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:21,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:21,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32955765] [2024-06-21 19:17:21,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32955765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:21,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:21,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:17:21,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499571298] [2024-06-21 19:17:21,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:21,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:17:21,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:21,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:17:21,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:17:21,588 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:21,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 331 transitions, 4147 flow. Second operand has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:21,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:21,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:21,588 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:22,231 INFO L124 PetriNetUnfolderBase]: 904/1558 cut-off events. [2024-06-21 19:17:22,231 INFO L125 PetriNetUnfolderBase]: For 195924/195924 co-relation queries the response was YES. [2024-06-21 19:17:22,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13292 conditions, 1558 events. 904/1558 cut-off events. For 195924/195924 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 8293 event pairs, 116 based on Foata normal form. 2/1558 useless extension candidates. Maximal degree in co-relation 13161. Up to 1430 conditions per place. [2024-06-21 19:17:22,248 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 308 selfloop transitions, 46 changer transitions 0/356 dead transitions. [2024-06-21 19:17:22,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 356 transitions, 4947 flow [2024-06-21 19:17:22,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:17:22,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:17:22,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-06-21 19:17:22,250 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36476426799007444 [2024-06-21 19:17:22,250 INFO L175 Difference]: Start difference. First operand has 318 places, 331 transitions, 4147 flow. Second operand 13 states and 147 transitions. [2024-06-21 19:17:22,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 356 transitions, 4947 flow [2024-06-21 19:17:22,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 356 transitions, 4857 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 19:17:22,876 INFO L231 Difference]: Finished difference. Result has 321 places, 331 transitions, 4153 flow [2024-06-21 19:17:22,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4057, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4153, PETRI_PLACES=321, PETRI_TRANSITIONS=331} [2024-06-21 19:17:22,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 291 predicate places. [2024-06-21 19:17:22,877 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 331 transitions, 4153 flow [2024-06-21 19:17:22,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.555555555555555) internal successors, (68), 9 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:22,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:22,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:22,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 19:17:22,877 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)] === [2024-06-21 19:17:22,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:22,878 INFO L85 PathProgramCache]: Analyzing trace with hash -731636627, now seen corresponding path program 6 times [2024-06-21 19:17:22,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:22,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872090453] [2024-06-21 19:17:22,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:22,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:23,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:23,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:23,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872090453] [2024-06-21 19:17:23,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872090453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:23,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:23,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 19:17:23,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099849937] [2024-06-21 19:17:23,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:23,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 19:17:23,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:23,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 19:17:23,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2024-06-21 19:17:23,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 19:17:23,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 331 transitions, 4153 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:23,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:23,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 19:17:23,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:24,078 INFO L124 PetriNetUnfolderBase]: 863/1526 cut-off events. [2024-06-21 19:17:24,078 INFO L125 PetriNetUnfolderBase]: For 201447/201450 co-relation queries the response was YES. [2024-06-21 19:17:24,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12893 conditions, 1526 events. 863/1526 cut-off events. For 201447/201450 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 8392 event pairs, 88 based on Foata normal form. 5/1528 useless extension candidates. Maximal degree in co-relation 12760. Up to 996 conditions per place. [2024-06-21 19:17:24,096 INFO L140 encePairwiseOnDemand]: 22/31 looper letters, 183 selfloop transitions, 47 changer transitions 0/359 dead transitions. [2024-06-21 19:17:24,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 359 transitions, 4901 flow [2024-06-21 19:17:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:17:24,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:17:24,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2024-06-21 19:17:24,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220430107526882 [2024-06-21 19:17:24,097 INFO L175 Difference]: Start difference. First operand has 321 places, 331 transitions, 4153 flow. Second operand 12 states and 157 transitions. [2024-06-21 19:17:24,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 359 transitions, 4901 flow [2024-06-21 19:17:24,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 359 transitions, 4809 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 19:17:24,778 INFO L231 Difference]: Finished difference. Result has 322 places, 333 transitions, 4189 flow [2024-06-21 19:17:24,779 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4061, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4189, PETRI_PLACES=322, PETRI_TRANSITIONS=333} [2024-06-21 19:17:24,779 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-21 19:17:24,779 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 333 transitions, 4189 flow [2024-06-21 19:17:24,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:17:24,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:24,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:24,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 19:17:24,780 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)] === [2024-06-21 19:17:24,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:24,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1482193289, now seen corresponding path program 20 times [2024-06-21 19:17:24,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:24,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311746290] [2024-06-21 19:17:24,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:24,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:24,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:26,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:26,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:26,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311746290] [2024-06-21 19:17:26,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311746290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:26,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:26,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:26,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328635341] [2024-06-21 19:17:26,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:26,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:26,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:26,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:26,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:26,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:26,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 333 transitions, 4189 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) [2024-06-21 19:17:26,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:26,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:26,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:27,600 INFO L124 PetriNetUnfolderBase]: 955/1645 cut-off events. [2024-06-21 19:17:27,600 INFO L125 PetriNetUnfolderBase]: For 235928/235928 co-relation queries the response was YES. [2024-06-21 19:17:27,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14497 conditions, 1645 events. 955/1645 cut-off events. For 235928/235928 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 8870 event pairs, 126 based on Foata normal form. 4/1647 useless extension candidates. Maximal degree in co-relation 14363. Up to 1418 conditions per place. [2024-06-21 19:17:27,619 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 314 selfloop transitions, 53 changer transitions 0/369 dead transitions. [2024-06-21 19:17:27,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 369 transitions, 5520 flow [2024-06-21 19:17:27,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:27,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:27,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 141 transitions. [2024-06-21 19:17:27,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41348973607038125 [2024-06-21 19:17:27,621 INFO L175 Difference]: Start difference. First operand has 322 places, 333 transitions, 4189 flow. Second operand 11 states and 141 transitions. [2024-06-21 19:17:27,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 369 transitions, 5520 flow [2024-06-21 19:17:28,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 369 transitions, 5414 flow, removed 17 selfloop flow, removed 11 redundant places. [2024-06-21 19:17:28,465 INFO L231 Difference]: Finished difference. Result has 322 places, 340 transitions, 4345 flow [2024-06-21 19:17:28,466 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4095, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4345, PETRI_PLACES=322, PETRI_TRANSITIONS=340} [2024-06-21 19:17:28,466 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 292 predicate places. [2024-06-21 19:17:28,466 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 340 transitions, 4345 flow [2024-06-21 19:17:28,466 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) [2024-06-21 19:17:28,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:28,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:28,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 19:17:28,467 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)] === [2024-06-21 19:17:28,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:28,467 INFO L85 PathProgramCache]: Analyzing trace with hash -782472407, now seen corresponding path program 7 times [2024-06-21 19:17:28,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:28,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569696208] [2024-06-21 19:17:28,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:28,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:30,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:30,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569696208] [2024-06-21 19:17:30,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569696208] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:30,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:30,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:30,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833315920] [2024-06-21 19:17:30,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:30,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:30,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:30,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:30,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:30,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 340 transitions, 4345 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) [2024-06-21 19:17:30,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:30,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:30,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:31,102 INFO L124 PetriNetUnfolderBase]: 971/1677 cut-off events. [2024-06-21 19:17:31,102 INFO L125 PetriNetUnfolderBase]: For 226084/226084 co-relation queries the response was YES. [2024-06-21 19:17:31,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14779 conditions, 1677 events. 971/1677 cut-off events. For 226084/226084 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 9151 event pairs, 143 based on Foata normal form. 2/1677 useless extension candidates. Maximal degree in co-relation 14649. Up to 1556 conditions per place. [2024-06-21 19:17:31,120 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 332 selfloop transitions, 37 changer transitions 0/371 dead transitions. [2024-06-21 19:17:31,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 371 transitions, 5401 flow [2024-06-21 19:17:31,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:17:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:17:31,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 148 transitions. [2024-06-21 19:17:31,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36724565756823824 [2024-06-21 19:17:31,122 INFO L175 Difference]: Start difference. First operand has 322 places, 340 transitions, 4345 flow. Second operand 13 states and 148 transitions. [2024-06-21 19:17:31,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 371 transitions, 5401 flow [2024-06-21 19:17:31,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 371 transitions, 5291 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 19:17:31,950 INFO L231 Difference]: Finished difference. Result has 332 places, 346 transitions, 4405 flow [2024-06-21 19:17:31,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4235, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=340, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4405, PETRI_PLACES=332, PETRI_TRANSITIONS=346} [2024-06-21 19:17:31,951 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 302 predicate places. [2024-06-21 19:17:31,951 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 346 transitions, 4405 flow [2024-06-21 19:17:31,951 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) [2024-06-21 19:17:31,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:31,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:31,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 19:17:31,951 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)] === [2024-06-21 19:17:31,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:31,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1552330193, now seen corresponding path program 21 times [2024-06-21 19:17:31,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:31,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15993478] [2024-06-21 19:17:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:31,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:33,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:33,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:33,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15993478] [2024-06-21 19:17:33,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15993478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:33,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:33,724 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:33,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662814973] [2024-06-21 19:17:33,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:33,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:33,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:33,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:33,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:33,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:33,838 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 346 transitions, 4405 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) [2024-06-21 19:17:33,838 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:33,838 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:33,838 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:34,682 INFO L124 PetriNetUnfolderBase]: 993/1713 cut-off events. [2024-06-21 19:17:34,683 INFO L125 PetriNetUnfolderBase]: For 246137/246137 co-relation queries the response was YES. [2024-06-21 19:17:34,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15262 conditions, 1713 events. 993/1713 cut-off events. For 246137/246137 co-relation queries the response was YES. Maximal size of possible extension queue 163. Compared 9389 event pairs, 145 based on Foata normal form. 4/1715 useless extension candidates. Maximal degree in co-relation 15126. Up to 1588 conditions per place. [2024-06-21 19:17:34,703 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 332 selfloop transitions, 39 changer transitions 0/373 dead transitions. [2024-06-21 19:17:34,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 373 transitions, 5497 flow [2024-06-21 19:17:34,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:34,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:34,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 134 transitions. [2024-06-21 19:17:34,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39296187683284456 [2024-06-21 19:17:34,705 INFO L175 Difference]: Start difference. First operand has 332 places, 346 transitions, 4405 flow. Second operand 11 states and 134 transitions. [2024-06-21 19:17:34,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 373 transitions, 5497 flow [2024-06-21 19:17:35,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 373 transitions, 5418 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-21 19:17:35,548 INFO L231 Difference]: Finished difference. Result has 336 places, 351 transitions, 4508 flow [2024-06-21 19:17:35,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4326, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4508, PETRI_PLACES=336, PETRI_TRANSITIONS=351} [2024-06-21 19:17:35,549 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 306 predicate places. [2024-06-21 19:17:35,549 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 351 transitions, 4508 flow [2024-06-21 19:17:35,549 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) [2024-06-21 19:17:35,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:35,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:35,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 19:17:35,549 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)] === [2024-06-21 19:17:35,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:35,550 INFO L85 PathProgramCache]: Analyzing trace with hash -696558077, now seen corresponding path program 8 times [2024-06-21 19:17:35,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:35,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003596188] [2024-06-21 19:17:35,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:35,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:37,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:37,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003596188] [2024-06-21 19:17:37,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003596188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:37,392 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:37,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:37,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143576053] [2024-06-21 19:17:37,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:37,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:37,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:37,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:37,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:37,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:37,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 351 transitions, 4508 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) [2024-06-21 19:17:37,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:37,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:37,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:38,381 INFO L124 PetriNetUnfolderBase]: 1000/1726 cut-off events. [2024-06-21 19:17:38,382 INFO L125 PetriNetUnfolderBase]: For 244142/244142 co-relation queries the response was YES. [2024-06-21 19:17:38,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15474 conditions, 1726 events. 1000/1726 cut-off events. For 244142/244142 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 9489 event pairs, 154 based on Foata normal form. 2/1726 useless extension candidates. Maximal degree in co-relation 15336. Up to 1625 conditions per place. [2024-06-21 19:17:38,403 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 338 selfloop transitions, 36 changer transitions 0/376 dead transitions. [2024-06-21 19:17:38,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 376 transitions, 5369 flow [2024-06-21 19:17:38,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:17:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:17:38,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 19:17:38,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 19:17:38,405 INFO L175 Difference]: Start difference. First operand has 336 places, 351 transitions, 4508 flow. Second operand 12 states and 139 transitions. [2024-06-21 19:17:38,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 376 transitions, 5369 flow [2024-06-21 19:17:39,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 376 transitions, 5272 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-21 19:17:39,332 INFO L231 Difference]: Finished difference. Result has 341 places, 354 transitions, 4532 flow [2024-06-21 19:17:39,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4413, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4532, PETRI_PLACES=341, PETRI_TRANSITIONS=354} [2024-06-21 19:17:39,332 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 311 predicate places. [2024-06-21 19:17:39,333 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 354 transitions, 4532 flow [2024-06-21 19:17:39,333 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) [2024-06-21 19:17:39,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:39,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:39,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 19:17:39,333 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)] === [2024-06-21 19:17:39,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:39,333 INFO L85 PathProgramCache]: Analyzing trace with hash -692983157, now seen corresponding path program 9 times [2024-06-21 19:17:39,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:39,334 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351876386] [2024-06-21 19:17:39,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:39,334 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:39,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:41,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:41,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351876386] [2024-06-21 19:17:41,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351876386] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:41,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:41,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:41,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236041239] [2024-06-21 19:17:41,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:41,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:41,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:41,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:41,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:41,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:41,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 354 transitions, 4532 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) [2024-06-21 19:17:41,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:41,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:41,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:42,209 INFO L124 PetriNetUnfolderBase]: 997/1721 cut-off events. [2024-06-21 19:17:42,209 INFO L125 PetriNetUnfolderBase]: For 241888/241888 co-relation queries the response was YES. [2024-06-21 19:17:42,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15293 conditions, 1721 events. 997/1721 cut-off events. For 241888/241888 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 9428 event pairs, 161 based on Foata normal form. 2/1721 useless extension candidates. Maximal degree in co-relation 15154. Up to 1647 conditions per place. [2024-06-21 19:17:42,228 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 343 selfloop transitions, 29 changer transitions 0/374 dead transitions. [2024-06-21 19:17:42,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 374 transitions, 5349 flow [2024-06-21 19:17:42,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:17:42,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:17:42,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 19:17:42,230 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 19:17:42,230 INFO L175 Difference]: Start difference. First operand has 341 places, 354 transitions, 4532 flow. Second operand 11 states and 124 transitions. [2024-06-21 19:17:42,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 374 transitions, 5349 flow [2024-06-21 19:17:43,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 374 transitions, 5263 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 19:17:43,152 INFO L231 Difference]: Finished difference. Result has 344 places, 357 transitions, 4552 flow [2024-06-21 19:17:43,152 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4448, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=354, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4552, PETRI_PLACES=344, PETRI_TRANSITIONS=357} [2024-06-21 19:17:43,152 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 314 predicate places. [2024-06-21 19:17:43,152 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 357 transitions, 4552 flow [2024-06-21 19:17:43,152 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) [2024-06-21 19:17:43,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:43,153 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:43,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 19:17:43,153 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)] === [2024-06-21 19:17:43,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:43,153 INFO L85 PathProgramCache]: Analyzing trace with hash -1438884143, now seen corresponding path program 22 times [2024-06-21 19:17:43,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:43,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027615198] [2024-06-21 19:17:43,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:43,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:43,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:45,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:45,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:45,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027615198] [2024-06-21 19:17:45,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027615198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:45,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:45,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:17:45,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123733036] [2024-06-21 19:17:45,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:45,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:17:45,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:45,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:17:45,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:17:45,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:45,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 357 transitions, 4552 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) [2024-06-21 19:17:45,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:45,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:45,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:46,311 INFO L124 PetriNetUnfolderBase]: 1029/1773 cut-off events. [2024-06-21 19:17:46,312 INFO L125 PetriNetUnfolderBase]: For 271545/271545 co-relation queries the response was YES. [2024-06-21 19:17:46,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16124 conditions, 1773 events. 1029/1773 cut-off events. For 271545/271545 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 9751 event pairs, 114 based on Foata normal form. 4/1775 useless extension candidates. Maximal degree in co-relation 15982. Up to 758 conditions per place. [2024-06-21 19:17:46,333 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 201 selfloop transitions, 194 changer transitions 0/397 dead transitions. [2024-06-21 19:17:46,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 397 transitions, 6352 flow [2024-06-21 19:17:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:17:46,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:17:46,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 176 transitions. [2024-06-21 19:17:46,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43672456575682383 [2024-06-21 19:17:46,336 INFO L175 Difference]: Start difference. First operand has 344 places, 357 transitions, 4552 flow. Second operand 13 states and 176 transitions. [2024-06-21 19:17:46,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 397 transitions, 6352 flow [2024-06-21 19:17:47,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 397 transitions, 6313 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-21 19:17:47,306 INFO L231 Difference]: Finished difference. Result has 350 places, 364 transitions, 5067 flow [2024-06-21 19:17:47,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4515, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5067, PETRI_PLACES=350, PETRI_TRANSITIONS=364} [2024-06-21 19:17:47,307 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 320 predicate places. [2024-06-21 19:17:47,307 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 364 transitions, 5067 flow [2024-06-21 19:17:47,307 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) [2024-06-21 19:17:47,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:47,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:47,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 19:17:47,308 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)] === [2024-06-21 19:17:47,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:47,308 INFO L85 PathProgramCache]: Analyzing trace with hash 269397867, now seen corresponding path program 23 times [2024-06-21 19:17:47,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:47,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793195493] [2024-06-21 19:17:47,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:47,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:47,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:49,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:49,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:49,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793195493] [2024-06-21 19:17:49,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793195493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:49,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:49,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:17:49,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666734428] [2024-06-21 19:17:49,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:49,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:17:49,154 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:49,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:17:49,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:17:49,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:49,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 364 transitions, 5067 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) [2024-06-21 19:17:49,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:49,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:49,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:50,258 INFO L124 PetriNetUnfolderBase]: 1043/1797 cut-off events. [2024-06-21 19:17:50,258 INFO L125 PetriNetUnfolderBase]: For 279466/279466 co-relation queries the response was YES. [2024-06-21 19:17:50,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16961 conditions, 1797 events. 1043/1797 cut-off events. For 279466/279466 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 9923 event pairs, 109 based on Foata normal form. 4/1799 useless extension candidates. Maximal degree in co-relation 16818. Up to 769 conditions per place. [2024-06-21 19:17:50,283 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 193 selfloop transitions, 204 changer transitions 0/399 dead transitions. [2024-06-21 19:17:50,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 399 transitions, 6617 flow [2024-06-21 19:17:50,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:17:50,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:17:50,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 180 transitions. [2024-06-21 19:17:50,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147465437788018 [2024-06-21 19:17:50,285 INFO L175 Difference]: Start difference. First operand has 350 places, 364 transitions, 5067 flow. Second operand 14 states and 180 transitions. [2024-06-21 19:17:50,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 399 transitions, 6617 flow [2024-06-21 19:17:51,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 399 transitions, 6404 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-21 19:17:51,518 INFO L231 Difference]: Finished difference. Result has 356 places, 367 transitions, 5342 flow [2024-06-21 19:17:51,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4870, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=364, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=201, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5342, PETRI_PLACES=356, PETRI_TRANSITIONS=367} [2024-06-21 19:17:51,519 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 326 predicate places. [2024-06-21 19:17:51,519 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 367 transitions, 5342 flow [2024-06-21 19:17:51,519 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) [2024-06-21 19:17:51,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:51,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:51,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 19:17:51,519 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)] === [2024-06-21 19:17:51,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:51,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1114375829, now seen corresponding path program 24 times [2024-06-21 19:17:51,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:51,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142978765] [2024-06-21 19:17:51,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:51,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:51,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:53,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:53,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:53,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142978765] [2024-06-21 19:17:53,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142978765] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:53,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:53,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:53,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773660733] [2024-06-21 19:17:53,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:53,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:53,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:53,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:53,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:53,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:53,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 367 transitions, 5342 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) [2024-06-21 19:17:53,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:53,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:53,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:54,707 INFO L124 PetriNetUnfolderBase]: 1045/1801 cut-off events. [2024-06-21 19:17:54,707 INFO L125 PetriNetUnfolderBase]: For 277273/277273 co-relation queries the response was YES. [2024-06-21 19:17:54,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17066 conditions, 1801 events. 1045/1801 cut-off events. For 277273/277273 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 9959 event pairs, 112 based on Foata normal form. 4/1803 useless extension candidates. Maximal degree in co-relation 16923. Up to 774 conditions per place. [2024-06-21 19:17:54,728 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 189 selfloop transitions, 211 changer transitions 0/402 dead transitions. [2024-06-21 19:17:54,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 402 transitions, 6898 flow [2024-06-21 19:17:54,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:17:54,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:17:54,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 180 transitions. [2024-06-21 19:17:54,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4147465437788018 [2024-06-21 19:17:54,730 INFO L175 Difference]: Start difference. First operand has 356 places, 367 transitions, 5342 flow. Second operand 14 states and 180 transitions. [2024-06-21 19:17:54,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 402 transitions, 6898 flow [2024-06-21 19:17:55,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 402 transitions, 6508 flow, removed 25 selfloop flow, removed 10 redundant places. [2024-06-21 19:17:55,721 INFO L231 Difference]: Finished difference. Result has 360 places, 369 transitions, 5415 flow [2024-06-21 19:17:55,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5415, PETRI_PLACES=360, PETRI_TRANSITIONS=369} [2024-06-21 19:17:55,721 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 330 predicate places. [2024-06-21 19:17:55,722 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 369 transitions, 5415 flow [2024-06-21 19:17:55,722 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) [2024-06-21 19:17:55,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:17:55,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:17:55,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 19:17:55,722 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)] === [2024-06-21 19:17:55,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:17:55,723 INFO L85 PathProgramCache]: Analyzing trace with hash -410885015, now seen corresponding path program 10 times [2024-06-21 19:17:55,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:17:55,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023666143] [2024-06-21 19:17:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:17:55,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:17:55,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:17:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:17:57,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:17:57,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023666143] [2024-06-21 19:17:57,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023666143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:17:57,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:17:57,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:17:57,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269049632] [2024-06-21 19:17:57,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:17:57,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:17:57,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:17:57,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:17:57,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:17:58,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:17:58,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 369 transitions, 5415 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) [2024-06-21 19:17:58,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:17:58,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:17:58,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:17:59,030 INFO L124 PetriNetUnfolderBase]: 1049/1809 cut-off events. [2024-06-21 19:17:59,031 INFO L125 PetriNetUnfolderBase]: For 276949/276949 co-relation queries the response was YES. [2024-06-21 19:17:59,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17157 conditions, 1809 events. 1049/1809 cut-off events. For 276949/276949 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 10020 event pairs, 193 based on Foata normal form. 2/1809 useless extension candidates. Maximal degree in co-relation 17014. Up to 1734 conditions per place. [2024-06-21 19:17:59,053 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 370 selfloop transitions, 23 changer transitions 0/395 dead transitions. [2024-06-21 19:17:59,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 395 transitions, 6509 flow [2024-06-21 19:17:59,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:17:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:17:59,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 19:17:59,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 19:17:59,054 INFO L175 Difference]: Start difference. First operand has 360 places, 369 transitions, 5415 flow. Second operand 12 states and 136 transitions. [2024-06-21 19:17:59,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 395 transitions, 6509 flow [2024-06-21 19:18:00,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 395 transitions, 6133 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-21 19:18:00,136 INFO L231 Difference]: Finished difference. Result has 364 places, 373 transitions, 5165 flow [2024-06-21 19:18:00,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5040, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5165, PETRI_PLACES=364, PETRI_TRANSITIONS=373} [2024-06-21 19:18:00,137 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 334 predicate places. [2024-06-21 19:18:00,137 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 373 transitions, 5165 flow [2024-06-21 19:18:00,137 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) [2024-06-21 19:18:00,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:00,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:00,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 19:18:00,138 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)] === [2024-06-21 19:18:00,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:00,138 INFO L85 PathProgramCache]: Analyzing trace with hash -413563415, now seen corresponding path program 11 times [2024-06-21 19:18:00,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:00,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589417126] [2024-06-21 19:18:00,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:00,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:00,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:01,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:01,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589417126] [2024-06-21 19:18:01,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589417126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:01,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:01,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:01,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493731570] [2024-06-21 19:18:01,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:01,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:01,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:01,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:01,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:01,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:01,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 373 transitions, 5165 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) [2024-06-21 19:18:01,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:01,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:01,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:03,017 INFO L124 PetriNetUnfolderBase]: 1056/1822 cut-off events. [2024-06-21 19:18:03,018 INFO L125 PetriNetUnfolderBase]: For 281010/281010 co-relation queries the response was YES. [2024-06-21 19:18:03,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16849 conditions, 1822 events. 1056/1822 cut-off events. For 281010/281010 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 10109 event pairs, 195 based on Foata normal form. 2/1822 useless extension candidates. Maximal degree in co-relation 16703. Up to 1767 conditions per place. [2024-06-21 19:18:03,040 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 370 selfloop transitions, 23 changer transitions 0/395 dead transitions. [2024-06-21 19:18:03,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 395 transitions, 6055 flow [2024-06-21 19:18:03,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:18:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:18:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-21 19:18:03,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-21 19:18:03,041 INFO L175 Difference]: Start difference. First operand has 364 places, 373 transitions, 5165 flow. Second operand 12 states and 133 transitions. [2024-06-21 19:18:03,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 395 transitions, 6055 flow [2024-06-21 19:18:04,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 395 transitions, 5911 flow, removed 29 selfloop flow, removed 11 redundant places. [2024-06-21 19:18:04,112 INFO L231 Difference]: Finished difference. Result has 365 places, 376 transitions, 5127 flow [2024-06-21 19:18:04,113 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5033, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=352, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5127, PETRI_PLACES=365, PETRI_TRANSITIONS=376} [2024-06-21 19:18:04,113 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 335 predicate places. [2024-06-21 19:18:04,113 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 376 transitions, 5127 flow [2024-06-21 19:18:04,113 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) [2024-06-21 19:18:04,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:04,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:04,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 19:18:04,113 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)] === [2024-06-21 19:18:04,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:04,114 INFO L85 PathProgramCache]: Analyzing trace with hash -410761945, now seen corresponding path program 25 times [2024-06-21 19:18:04,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:04,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580341316] [2024-06-21 19:18:04,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:04,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:04,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:05,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:05,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:05,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580341316] [2024-06-21 19:18:05,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580341316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:05,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:05,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:05,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601379590] [2024-06-21 19:18:05,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:05,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:05,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:05,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:05,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:05,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:05,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 376 transitions, 5127 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) [2024-06-21 19:18:05,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:05,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:05,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:06,448 INFO L124 PetriNetUnfolderBase]: 1058/1826 cut-off events. [2024-06-21 19:18:06,449 INFO L125 PetriNetUnfolderBase]: For 285314/285314 co-relation queries the response was YES. [2024-06-21 19:18:06,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16534 conditions, 1826 events. 1058/1826 cut-off events. For 285314/285314 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 10158 event pairs, 193 based on Foata normal form. 4/1828 useless extension candidates. Maximal degree in co-relation 16391. Up to 1744 conditions per place. [2024-06-21 19:18:06,471 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 369 selfloop transitions, 27 changer transitions 0/398 dead transitions. [2024-06-21 19:18:06,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 398 transitions, 6243 flow [2024-06-21 19:18:06,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:18:06,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:18:06,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 122 transitions. [2024-06-21 19:18:06,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3935483870967742 [2024-06-21 19:18:06,472 INFO L175 Difference]: Start difference. First operand has 365 places, 376 transitions, 5127 flow. Second operand 10 states and 122 transitions. [2024-06-21 19:18:06,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 398 transitions, 6243 flow [2024-06-21 19:18:07,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 398 transitions, 6191 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:07,731 INFO L231 Difference]: Finished difference. Result has 366 places, 379 transitions, 5199 flow [2024-06-21 19:18:07,732 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5075, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5199, PETRI_PLACES=366, PETRI_TRANSITIONS=379} [2024-06-21 19:18:07,732 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 336 predicate places. [2024-06-21 19:18:07,732 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 379 transitions, 5199 flow [2024-06-21 19:18:07,732 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) [2024-06-21 19:18:07,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:07,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:07,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 19:18:07,732 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)] === [2024-06-21 19:18:07,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:07,733 INFO L85 PathProgramCache]: Analyzing trace with hash -410766905, now seen corresponding path program 12 times [2024-06-21 19:18:07,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:07,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336190060] [2024-06-21 19:18:07,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:07,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:07,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:09,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:09,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336190060] [2024-06-21 19:18:09,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336190060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:09,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:09,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:09,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899475549] [2024-06-21 19:18:09,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:09,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:09,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:09,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:09,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:09,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:09,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 379 transitions, 5199 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) [2024-06-21 19:18:09,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:09,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:09,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:10,662 INFO L124 PetriNetUnfolderBase]: 1055/1821 cut-off events. [2024-06-21 19:18:10,663 INFO L125 PetriNetUnfolderBase]: For 273204/273204 co-relation queries the response was YES. [2024-06-21 19:18:10,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16432 conditions, 1821 events. 1055/1821 cut-off events. For 273204/273204 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 10117 event pairs, 195 based on Foata normal form. 2/1821 useless extension candidates. Maximal degree in co-relation 16288. Up to 1766 conditions per place. [2024-06-21 19:18:10,685 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 371 selfloop transitions, 22 changer transitions 0/395 dead transitions. [2024-06-21 19:18:10,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 395 transitions, 6027 flow [2024-06-21 19:18:10,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:18:10,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:18:10,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 116 transitions. [2024-06-21 19:18:10,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 19:18:10,686 INFO L175 Difference]: Start difference. First operand has 366 places, 379 transitions, 5199 flow. Second operand 10 states and 116 transitions. [2024-06-21 19:18:10,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 395 transitions, 6027 flow [2024-06-21 19:18:11,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 395 transitions, 5788 flow, removed 29 selfloop flow, removed 11 redundant places. [2024-06-21 19:18:11,946 INFO L231 Difference]: Finished difference. Result has 365 places, 379 transitions, 5008 flow [2024-06-21 19:18:11,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4960, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5008, PETRI_PLACES=365, PETRI_TRANSITIONS=379} [2024-06-21 19:18:11,947 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 335 predicate places. [2024-06-21 19:18:11,947 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 379 transitions, 5008 flow [2024-06-21 19:18:11,947 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) [2024-06-21 19:18:11,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:11,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:11,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 19:18:11,948 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)] === [2024-06-21 19:18:11,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:11,948 INFO L85 PathProgramCache]: Analyzing trace with hash -123402737, now seen corresponding path program 1 times [2024-06-21 19:18:11,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:11,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085048768] [2024-06-21 19:18:11,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:11,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:11,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:13,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:13,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085048768] [2024-06-21 19:18:13,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085048768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:13,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:13,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:13,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029320600] [2024-06-21 19:18:13,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:13,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:13,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:13,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:13,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:13,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:13,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 379 transitions, 5008 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) [2024-06-21 19:18:13,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:13,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:13,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:14,666 INFO L124 PetriNetUnfolderBase]: 1051/1814 cut-off events. [2024-06-21 19:18:14,666 INFO L125 PetriNetUnfolderBase]: For 269019/269019 co-relation queries the response was YES. [2024-06-21 19:18:14,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16104 conditions, 1814 events. 1051/1814 cut-off events. For 269019/269019 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 10094 event pairs, 198 based on Foata normal form. 1/1813 useless extension candidates. Maximal degree in co-relation 15960. Up to 1747 conditions per place. [2024-06-21 19:18:14,688 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 358 selfloop transitions, 32 changer transitions 0/392 dead transitions. [2024-06-21 19:18:14,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 392 transitions, 5820 flow [2024-06-21 19:18:14,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:18:14,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:18:14,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 118 transitions. [2024-06-21 19:18:14,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38064516129032255 [2024-06-21 19:18:14,689 INFO L175 Difference]: Start difference. First operand has 365 places, 379 transitions, 5008 flow. Second operand 10 states and 118 transitions. [2024-06-21 19:18:14,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 392 transitions, 5820 flow [2024-06-21 19:18:15,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 392 transitions, 5745 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:15,741 INFO L231 Difference]: Finished difference. Result has 366 places, 379 transitions, 5002 flow [2024-06-21 19:18:15,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4933, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5002, PETRI_PLACES=366, PETRI_TRANSITIONS=379} [2024-06-21 19:18:15,741 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 336 predicate places. [2024-06-21 19:18:15,742 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 379 transitions, 5002 flow [2024-06-21 19:18:15,742 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) [2024-06-21 19:18:15,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:15,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:15,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 19:18:15,742 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)] === [2024-06-21 19:18:15,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:15,743 INFO L85 PathProgramCache]: Analyzing trace with hash -123156473, now seen corresponding path program 6 times [2024-06-21 19:18:15,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:15,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986778218] [2024-06-21 19:18:15,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:15,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:15,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:17,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:17,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986778218] [2024-06-21 19:18:17,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986778218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:17,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:17,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:18:17,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303727036] [2024-06-21 19:18:17,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:17,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:18:17,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:17,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:18:17,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:18:17,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:17,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 379 transitions, 5002 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) [2024-06-21 19:18:17,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:17,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:17,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:17,945 INFO L124 PetriNetUnfolderBase]: 1048/1809 cut-off events. [2024-06-21 19:18:17,945 INFO L125 PetriNetUnfolderBase]: For 269621/269621 co-relation queries the response was YES. [2024-06-21 19:18:17,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15924 conditions, 1809 events. 1048/1809 cut-off events. For 269621/269621 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 10084 event pairs, 180 based on Foata normal form. 2/1809 useless extension candidates. Maximal degree in co-relation 15779. Up to 1718 conditions per place. [2024-06-21 19:18:17,967 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 359 selfloop transitions, 33 changer transitions 0/394 dead transitions. [2024-06-21 19:18:17,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 394 transitions, 5826 flow [2024-06-21 19:18:17,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 19:18:17,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 19:18:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 111 transitions. [2024-06-21 19:18:17,970 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 19:18:17,970 INFO L175 Difference]: Start difference. First operand has 366 places, 379 transitions, 5002 flow. Second operand 9 states and 111 transitions. [2024-06-21 19:18:17,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 394 transitions, 5826 flow [2024-06-21 19:18:19,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 394 transitions, 5721 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:19,572 INFO L231 Difference]: Finished difference. Result has 366 places, 379 transitions, 4967 flow [2024-06-21 19:18:19,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4897, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4967, PETRI_PLACES=366, PETRI_TRANSITIONS=379} [2024-06-21 19:18:19,572 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 336 predicate places. [2024-06-21 19:18:19,573 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 379 transitions, 4967 flow [2024-06-21 19:18:19,573 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) [2024-06-21 19:18:19,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:19,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:19,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 19:18:19,573 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)] === [2024-06-21 19:18:19,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:19,573 INFO L85 PathProgramCache]: Analyzing trace with hash 827149990, now seen corresponding path program 1 times [2024-06-21 19:18:19,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:19,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425789371] [2024-06-21 19:18:19,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:19,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:19,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:21,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:21,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:21,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425789371] [2024-06-21 19:18:21,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425789371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:21,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:21,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:21,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770820609] [2024-06-21 19:18:21,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:21,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:21,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:21,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:21,916 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 379 transitions, 4967 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:21,916 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:21,916 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:21,916 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:22,738 INFO L124 PetriNetUnfolderBase]: 1059/1831 cut-off events. [2024-06-21 19:18:22,738 INFO L125 PetriNetUnfolderBase]: For 284886/284886 co-relation queries the response was YES. [2024-06-21 19:18:22,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16247 conditions, 1831 events. 1059/1831 cut-off events. For 284886/284886 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 10228 event pairs, 239 based on Foata normal form. 2/1831 useless extension candidates. Maximal degree in co-relation 16101. Up to 1722 conditions per place. [2024-06-21 19:18:22,759 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 376 selfloop transitions, 25 changer transitions 0/403 dead transitions. [2024-06-21 19:18:22,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 403 transitions, 6048 flow [2024-06-21 19:18:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:18:22,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:18:22,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 143 transitions. [2024-06-21 19:18:22,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:18:22,761 INFO L175 Difference]: Start difference. First operand has 366 places, 379 transitions, 4967 flow. Second operand 13 states and 143 transitions. [2024-06-21 19:18:22,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 403 transitions, 6048 flow [2024-06-21 19:18:23,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 403 transitions, 5932 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-21 19:18:23,987 INFO L231 Difference]: Finished difference. Result has 372 places, 382 transitions, 4942 flow [2024-06-21 19:18:23,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4851, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=379, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4942, PETRI_PLACES=372, PETRI_TRANSITIONS=382} [2024-06-21 19:18:23,988 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 342 predicate places. [2024-06-21 19:18:23,988 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 382 transitions, 4942 flow [2024-06-21 19:18:23,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:23,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:23,988 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:23,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 19:18:23,988 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)] === [2024-06-21 19:18:23,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:23,989 INFO L85 PathProgramCache]: Analyzing trace with hash 52675374, now seen corresponding path program 2 times [2024-06-21 19:18:23,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:23,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901328965] [2024-06-21 19:18:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:23,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:26,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:26,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:26,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901328965] [2024-06-21 19:18:26,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901328965] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:26,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:26,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:26,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364599990] [2024-06-21 19:18:26,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:26,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:26,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:26,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:26,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:26,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:26,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 382 transitions, 4942 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:26,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:26,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:26,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:27,423 INFO L124 PetriNetUnfolderBase]: 1066/1844 cut-off events. [2024-06-21 19:18:27,423 INFO L125 PetriNetUnfolderBase]: For 289712/289712 co-relation queries the response was YES. [2024-06-21 19:18:27,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16328 conditions, 1844 events. 1066/1844 cut-off events. For 289712/289712 co-relation queries the response was YES. Maximal size of possible extension queue 179. Compared 10318 event pairs, 247 based on Foata normal form. 2/1844 useless extension candidates. Maximal degree in co-relation 16179. Up to 1783 conditions per place. [2024-06-21 19:18:27,447 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 375 selfloop transitions, 25 changer transitions 0/402 dead transitions. [2024-06-21 19:18:27,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 402 transitions, 5829 flow [2024-06-21 19:18:27,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:18:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:18:27,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 139 transitions. [2024-06-21 19:18:27,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34491315136476425 [2024-06-21 19:18:27,449 INFO L175 Difference]: Start difference. First operand has 372 places, 382 transitions, 4942 flow. Second operand 13 states and 139 transitions. [2024-06-21 19:18:27,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 402 transitions, 5829 flow [2024-06-21 19:18:29,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 402 transitions, 5775 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-21 19:18:29,052 INFO L231 Difference]: Finished difference. Result has 378 places, 385 transitions, 4987 flow [2024-06-21 19:18:29,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4898, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=382, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4987, PETRI_PLACES=378, PETRI_TRANSITIONS=385} [2024-06-21 19:18:29,052 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 348 predicate places. [2024-06-21 19:18:29,052 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 385 transitions, 4987 flow [2024-06-21 19:18:29,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:29,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:29,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:29,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 19:18:29,053 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)] === [2024-06-21 19:18:29,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:29,054 INFO L85 PathProgramCache]: Analyzing trace with hash -198735406, now seen corresponding path program 3 times [2024-06-21 19:18:29,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:29,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515294225] [2024-06-21 19:18:29,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:29,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:29,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:31,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:31,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:31,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515294225] [2024-06-21 19:18:31,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515294225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:31,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:31,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:18:31,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075063313] [2024-06-21 19:18:31,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:31,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:18:31,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:31,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:18:31,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:18:31,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:31,677 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 385 transitions, 4987 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) [2024-06-21 19:18:31,677 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:31,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:31,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:32,634 INFO L124 PetriNetUnfolderBase]: 1070/1852 cut-off events. [2024-06-21 19:18:32,635 INFO L125 PetriNetUnfolderBase]: For 295285/295285 co-relation queries the response was YES. [2024-06-21 19:18:32,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16382 conditions, 1852 events. 1070/1852 cut-off events. For 295285/295285 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 10390 event pairs, 245 based on Foata normal form. 2/1852 useless extension candidates. Maximal degree in co-relation 16231. Up to 1777 conditions per place. [2024-06-21 19:18:32,657 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 376 selfloop transitions, 26 changer transitions 0/404 dead transitions. [2024-06-21 19:18:32,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 404 transitions, 5845 flow [2024-06-21 19:18:32,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:18:32,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:18:32,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 147 transitions. [2024-06-21 19:18:32,659 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3387096774193548 [2024-06-21 19:18:32,659 INFO L175 Difference]: Start difference. First operand has 378 places, 385 transitions, 4987 flow. Second operand 14 states and 147 transitions. [2024-06-21 19:18:32,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 404 transitions, 5845 flow [2024-06-21 19:18:33,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 404 transitions, 5794 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-21 19:18:33,960 INFO L231 Difference]: Finished difference. Result has 382 places, 386 transitions, 5002 flow [2024-06-21 19:18:33,963 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4936, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5002, PETRI_PLACES=382, PETRI_TRANSITIONS=386} [2024-06-21 19:18:33,963 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 352 predicate places. [2024-06-21 19:18:33,963 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 386 transitions, 5002 flow [2024-06-21 19:18:33,963 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) [2024-06-21 19:18:33,964 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:33,964 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:33,964 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 19:18:33,964 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)] === [2024-06-21 19:18:33,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:33,964 INFO L85 PathProgramCache]: Analyzing trace with hash 37816268, now seen corresponding path program 4 times [2024-06-21 19:18:33,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:33,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593552203] [2024-06-21 19:18:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:33,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:33,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:36,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:36,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593552203] [2024-06-21 19:18:36,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593552203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:36,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:36,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:18:36,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896447426] [2024-06-21 19:18:36,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:36,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:18:36,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:36,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:18:36,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:18:36,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:36,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 386 transitions, 5002 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) [2024-06-21 19:18:36,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:36,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:36,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:37,311 INFO L124 PetriNetUnfolderBase]: 1077/1865 cut-off events. [2024-06-21 19:18:37,311 INFO L125 PetriNetUnfolderBase]: For 301041/301041 co-relation queries the response was YES. [2024-06-21 19:18:37,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16524 conditions, 1865 events. 1077/1865 cut-off events. For 301041/301041 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 10507 event pairs, 249 based on Foata normal form. 2/1865 useless extension candidates. Maximal degree in co-relation 16372. Up to 1803 conditions per place. [2024-06-21 19:18:37,334 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 375 selfloop transitions, 26 changer transitions 0/403 dead transitions. [2024-06-21 19:18:37,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 403 transitions, 5881 flow [2024-06-21 19:18:37,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:18:37,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:18:37,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 19:18:37,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 19:18:37,336 INFO L175 Difference]: Start difference. First operand has 382 places, 386 transitions, 5002 flow. Second operand 12 states and 128 transitions. [2024-06-21 19:18:37,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 403 transitions, 5881 flow [2024-06-21 19:18:38,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 403 transitions, 5826 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 19:18:38,687 INFO L231 Difference]: Finished difference. Result has 383 places, 389 transitions, 5046 flow [2024-06-21 19:18:38,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4951, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5046, PETRI_PLACES=383, PETRI_TRANSITIONS=389} [2024-06-21 19:18:38,688 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 353 predicate places. [2024-06-21 19:18:38,688 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 389 transitions, 5046 flow [2024-06-21 19:18:38,688 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) [2024-06-21 19:18:38,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:38,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:38,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 19:18:38,689 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)] === [2024-06-21 19:18:38,690 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:38,690 INFO L85 PathProgramCache]: Analyzing trace with hash 915715750, now seen corresponding path program 5 times [2024-06-21 19:18:38,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:38,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504903000] [2024-06-21 19:18:38,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:38,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:38,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:40,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:40,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:40,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504903000] [2024-06-21 19:18:40,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504903000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:40,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:40,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:40,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765672701] [2024-06-21 19:18:40,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:40,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:40,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:40,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:40,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:40,787 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:40,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 389 transitions, 5046 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:40,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:40,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:40,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:41,603 INFO L124 PetriNetUnfolderBase]: 1081/1873 cut-off events. [2024-06-21 19:18:41,604 INFO L125 PetriNetUnfolderBase]: For 306841/306841 co-relation queries the response was YES. [2024-06-21 19:18:41,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16616 conditions, 1873 events. 1081/1873 cut-off events. For 306841/306841 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 10559 event pairs, 247 based on Foata normal form. 2/1873 useless extension candidates. Maximal degree in co-relation 16463. Up to 1788 conditions per place. [2024-06-21 19:18:41,626 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 376 selfloop transitions, 28 changer transitions 0/406 dead transitions. [2024-06-21 19:18:41,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 406 transitions, 6110 flow [2024-06-21 19:18:41,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:41,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:41,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 124 transitions. [2024-06-21 19:18:41,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-06-21 19:18:41,628 INFO L175 Difference]: Start difference. First operand has 383 places, 389 transitions, 5046 flow. Second operand 11 states and 124 transitions. [2024-06-21 19:18:41,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 406 transitions, 6110 flow [2024-06-21 19:18:43,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 406 transitions, 6056 flow, removed 3 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:43,331 INFO L231 Difference]: Finished difference. Result has 385 places, 390 transitions, 5064 flow [2024-06-21 19:18:43,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5064, PETRI_PLACES=385, PETRI_TRANSITIONS=390} [2024-06-21 19:18:43,331 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 355 predicate places. [2024-06-21 19:18:43,331 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 390 transitions, 5064 flow [2024-06-21 19:18:43,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:43,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:43,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:43,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 19:18:43,332 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)] === [2024-06-21 19:18:43,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:43,333 INFO L85 PathProgramCache]: Analyzing trace with hash 915863620, now seen corresponding path program 6 times [2024-06-21 19:18:43,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:43,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902299555] [2024-06-21 19:18:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:43,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:43,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:45,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:45,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902299555] [2024-06-21 19:18:45,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902299555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:45,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:45,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:45,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225592295] [2024-06-21 19:18:45,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:45,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:45,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:45,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:45,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:45,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:45,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 390 transitions, 5064 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:45,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:45,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:45,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:46,403 INFO L124 PetriNetUnfolderBase]: 1078/1868 cut-off events. [2024-06-21 19:18:46,403 INFO L125 PetriNetUnfolderBase]: For 302123/302123 co-relation queries the response was YES. [2024-06-21 19:18:46,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16452 conditions, 1868 events. 1078/1868 cut-off events. For 302123/302123 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 10530 event pairs, 248 based on Foata normal form. 2/1868 useless extension candidates. Maximal degree in co-relation 16298. Up to 1823 conditions per place. [2024-06-21 19:18:46,425 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 383 selfloop transitions, 19 changer transitions 0/404 dead transitions. [2024-06-21 19:18:46,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 404 transitions, 5904 flow [2024-06-21 19:18:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:46,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 19:18:46,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-21 19:18:46,427 INFO L175 Difference]: Start difference. First operand has 385 places, 390 transitions, 5064 flow. Second operand 11 states and 118 transitions. [2024-06-21 19:18:46,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 404 transitions, 5904 flow [2024-06-21 19:18:47,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 404 transitions, 5830 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-21 19:18:47,807 INFO L231 Difference]: Finished difference. Result has 387 places, 390 transitions, 5032 flow [2024-06-21 19:18:47,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4990, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5032, PETRI_PLACES=387, PETRI_TRANSITIONS=390} [2024-06-21 19:18:47,808 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 357 predicate places. [2024-06-21 19:18:47,808 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 390 transitions, 5032 flow [2024-06-21 19:18:47,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:47,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:47,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:47,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 19:18:47,808 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)] === [2024-06-21 19:18:47,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:47,809 INFO L85 PathProgramCache]: Analyzing trace with hash 915869355, now seen corresponding path program 1 times [2024-06-21 19:18:47,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:47,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132803452] [2024-06-21 19:18:47,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:47,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:47,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:50,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:50,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:50,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132803452] [2024-06-21 19:18:50,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132803452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:50,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:50,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:50,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120137442] [2024-06-21 19:18:50,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:50,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:50,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:50,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:50,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:50,837 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:50,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 390 transitions, 5032 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:50,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:50,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:50,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:51,840 INFO L124 PetriNetUnfolderBase]: 1074/1862 cut-off events. [2024-06-21 19:18:51,841 INFO L125 PetriNetUnfolderBase]: For 296757/296757 co-relation queries the response was YES. [2024-06-21 19:18:51,865 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16214 conditions, 1862 events. 1074/1862 cut-off events. For 296757/296757 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 10516 event pairs, 245 based on Foata normal form. 2/1862 useless extension candidates. Maximal degree in co-relation 16059. Up to 1782 conditions per place. [2024-06-21 19:18:51,872 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 372 selfloop transitions, 31 changer transitions 0/405 dead transitions. [2024-06-21 19:18:51,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 405 transitions, 5880 flow [2024-06-21 19:18:51,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:18:51,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:18:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 19:18:51,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 19:18:51,874 INFO L175 Difference]: Start difference. First operand has 387 places, 390 transitions, 5032 flow. Second operand 12 states and 130 transitions. [2024-06-21 19:18:51,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 405 transitions, 5880 flow [2024-06-21 19:18:53,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 405 transitions, 5806 flow, removed 9 selfloop flow, removed 11 redundant places. [2024-06-21 19:18:53,566 INFO L231 Difference]: Finished difference. Result has 388 places, 390 transitions, 5025 flow [2024-06-21 19:18:53,567 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4958, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5025, PETRI_PLACES=388, PETRI_TRANSITIONS=390} [2024-06-21 19:18:53,567 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 358 predicate places. [2024-06-21 19:18:53,567 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 390 transitions, 5025 flow [2024-06-21 19:18:53,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:53,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:53,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:53,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 19:18:53,568 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)] === [2024-06-21 19:18:53,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:53,568 INFO L85 PathProgramCache]: Analyzing trace with hash 194922594, now seen corresponding path program 7 times [2024-06-21 19:18:53,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:53,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825239026] [2024-06-21 19:18:53,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:53,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:53,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:18:55,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:18:55,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:18:55,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825239026] [2024-06-21 19:18:55,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825239026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:18:55,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:18:55,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:18:55,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948117975] [2024-06-21 19:18:55,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:18:55,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:18:55,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:18:55,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:18:55,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:18:55,891 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:18:55,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 390 transitions, 5025 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:55,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:18:55,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:18:55,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:18:56,684 INFO L124 PetriNetUnfolderBase]: 1081/1875 cut-off events. [2024-06-21 19:18:56,685 INFO L125 PetriNetUnfolderBase]: For 302323/302323 co-relation queries the response was YES. [2024-06-21 19:18:56,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16342 conditions, 1875 events. 1081/1875 cut-off events. For 302323/302323 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 10597 event pairs, 248 based on Foata normal form. 2/1875 useless extension candidates. Maximal degree in co-relation 16186. Up to 1658 conditions per place. [2024-06-21 19:18:56,709 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 333 selfloop transitions, 74 changer transitions 0/409 dead transitions. [2024-06-21 19:18:56,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 409 transitions, 5960 flow [2024-06-21 19:18:56,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:18:56,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:18:56,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 135 transitions. [2024-06-21 19:18:56,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39589442815249265 [2024-06-21 19:18:56,710 INFO L175 Difference]: Start difference. First operand has 388 places, 390 transitions, 5025 flow. Second operand 11 states and 135 transitions. [2024-06-21 19:18:56,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 409 transitions, 5960 flow [2024-06-21 19:18:58,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 409 transitions, 5882 flow, removed 3 selfloop flow, removed 11 redundant places. [2024-06-21 19:18:58,109 INFO L231 Difference]: Finished difference. Result has 389 places, 394 transitions, 5155 flow [2024-06-21 19:18:58,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4947, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=390, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5155, PETRI_PLACES=389, PETRI_TRANSITIONS=394} [2024-06-21 19:18:58,109 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 359 predicate places. [2024-06-21 19:18:58,110 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 394 transitions, 5155 flow [2024-06-21 19:18:58,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:18:58,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:18:58,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:18:58,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 19:18:58,110 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)] === [2024-06-21 19:18:58,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:18:58,111 INFO L85 PathProgramCache]: Analyzing trace with hash 194928329, now seen corresponding path program 2 times [2024-06-21 19:18:58,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:18:58,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056494366] [2024-06-21 19:18:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:18:58,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:18:58,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:01,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:01,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056494366] [2024-06-21 19:19:01,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056494366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:01,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:01,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:01,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592620371] [2024-06-21 19:19:01,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:01,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:01,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:01,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:01,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:01,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:01,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 394 transitions, 5155 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:01,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:01,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:01,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:02,262 INFO L124 PetriNetUnfolderBase]: 1077/1869 cut-off events. [2024-06-21 19:19:02,262 INFO L125 PetriNetUnfolderBase]: For 298613/298613 co-relation queries the response was YES. [2024-06-21 19:19:02,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16249 conditions, 1869 events. 1077/1869 cut-off events. For 298613/298613 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 10631 event pairs, 207 based on Foata normal form. 2/1869 useless extension candidates. Maximal degree in co-relation 16091. Up to 1501 conditions per place. [2024-06-21 19:19:02,286 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 327 selfloop transitions, 91 changer transitions 0/420 dead transitions. [2024-06-21 19:19:02,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 420 transitions, 6393 flow [2024-06-21 19:19:02,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:19:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:19:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 19:19:02,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 19:19:02,287 INFO L175 Difference]: Start difference. First operand has 389 places, 394 transitions, 5155 flow. Second operand 11 states and 139 transitions. [2024-06-21 19:19:02,287 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 420 transitions, 6393 flow [2024-06-21 19:19:03,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 420 transitions, 6201 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-21 19:19:03,721 INFO L231 Difference]: Finished difference. Result has 392 places, 394 transitions, 5164 flow [2024-06-21 19:19:03,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4977, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5164, PETRI_PLACES=392, PETRI_TRANSITIONS=394} [2024-06-21 19:19:03,722 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 362 predicate places. [2024-06-21 19:19:03,722 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 394 transitions, 5164 flow [2024-06-21 19:19:03,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:03,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:03,722 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:03,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 19:19:03,723 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)] === [2024-06-21 19:19:03,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:03,723 INFO L85 PathProgramCache]: Analyzing trace with hash -827266827, now seen corresponding path program 3 times [2024-06-21 19:19:03,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:03,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478805901] [2024-06-21 19:19:03,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:03,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:06,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:06,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:06,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478805901] [2024-06-21 19:19:06,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478805901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:06,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:06,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:06,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239548609] [2024-06-21 19:19:06,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:06,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:06,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:06,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:06,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:06,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:06,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 394 transitions, 5164 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:06,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:06,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:06,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:07,366 INFO L124 PetriNetUnfolderBase]: 1083/1879 cut-off events. [2024-06-21 19:19:07,366 INFO L125 PetriNetUnfolderBase]: For 302992/302992 co-relation queries the response was YES. [2024-06-21 19:19:07,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16413 conditions, 1879 events. 1083/1879 cut-off events. For 302992/302992 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 10655 event pairs, 223 based on Foata normal form. 2/1879 useless extension candidates. Maximal degree in co-relation 16254. Up to 1217 conditions per place. [2024-06-21 19:19:07,393 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 265 selfloop transitions, 149 changer transitions 0/416 dead transitions. [2024-06-21 19:19:07,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 416 transitions, 6514 flow [2024-06-21 19:19:07,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:19:07,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:19:07,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 149 transitions. [2024-06-21 19:19:07,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40053763440860213 [2024-06-21 19:19:07,394 INFO L175 Difference]: Start difference. First operand has 392 places, 394 transitions, 5164 flow. Second operand 12 states and 149 transitions. [2024-06-21 19:19:07,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 416 transitions, 6514 flow [2024-06-21 19:19:09,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 416 transitions, 6333 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 19:19:09,039 INFO L231 Difference]: Finished difference. Result has 396 places, 396 transitions, 5322 flow [2024-06-21 19:19:09,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4983, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=147, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5322, PETRI_PLACES=396, PETRI_TRANSITIONS=396} [2024-06-21 19:19:09,040 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 366 predicate places. [2024-06-21 19:19:09,040 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 396 transitions, 5322 flow [2024-06-21 19:19:09,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:09,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:09,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:09,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 19:19:09,040 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)] === [2024-06-21 19:19:09,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:09,041 INFO L85 PathProgramCache]: Analyzing trace with hash -827258891, now seen corresponding path program 1 times [2024-06-21 19:19:09,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:09,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124462206] [2024-06-21 19:19:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:09,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:11,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:11,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:11,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124462206] [2024-06-21 19:19:11,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124462206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:11,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:11,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:19:11,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490278899] [2024-06-21 19:19:11,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:11,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:19:11,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:11,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:19:11,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:19:11,826 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:11,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 396 transitions, 5322 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) [2024-06-21 19:19:11,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:11,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:11,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:12,427 INFO L124 PetriNetUnfolderBase]: 1087/1887 cut-off events. [2024-06-21 19:19:12,427 INFO L125 PetriNetUnfolderBase]: For 310719/310719 co-relation queries the response was YES. [2024-06-21 19:19:12,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16654 conditions, 1887 events. 1087/1887 cut-off events. For 310719/310719 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 10761 event pairs, 221 based on Foata normal form. 2/1887 useless extension candidates. Maximal degree in co-relation 16496. Up to 1712 conditions per place. [2024-06-21 19:19:12,450 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 349 selfloop transitions, 61 changer transitions 0/412 dead transitions. [2024-06-21 19:19:12,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 412 transitions, 6208 flow [2024-06-21 19:19:12,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:19:12,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:19:12,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 19:19:12,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 19:19:12,452 INFO L175 Difference]: Start difference. First operand has 396 places, 396 transitions, 5322 flow. Second operand 11 states and 126 transitions. [2024-06-21 19:19:12,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 412 transitions, 6208 flow [2024-06-21 19:19:13,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 412 transitions, 5920 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:13,946 INFO L231 Difference]: Finished difference. Result has 398 places, 397 transitions, 5186 flow [2024-06-21 19:19:13,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5034, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=396, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5186, PETRI_PLACES=398, PETRI_TRANSITIONS=397} [2024-06-21 19:19:13,947 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 368 predicate places. [2024-06-21 19:19:13,947 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 397 transitions, 5186 flow [2024-06-21 19:19:13,947 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) [2024-06-21 19:19:13,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:13,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:13,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 19:19:13,948 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)] === [2024-06-21 19:19:13,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:13,948 INFO L85 PathProgramCache]: Analyzing trace with hash -827468637, now seen corresponding path program 4 times [2024-06-21 19:19:13,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:13,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424094547] [2024-06-21 19:19:13,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:13,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:13,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:16,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:16,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:16,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424094547] [2024-06-21 19:19:16,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424094547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:16,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:16,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:16,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022134472] [2024-06-21 19:19:16,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:16,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:16,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:16,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:16,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:16,478 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:16,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 397 transitions, 5186 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:16,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:16,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:16,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:17,504 INFO L124 PetriNetUnfolderBase]: 1083/1881 cut-off events. [2024-06-21 19:19:17,504 INFO L125 PetriNetUnfolderBase]: For 301641/301641 co-relation queries the response was YES. [2024-06-21 19:19:17,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16213 conditions, 1881 events. 1083/1881 cut-off events. For 301641/301641 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 10689 event pairs, 244 based on Foata normal form. 2/1881 useless extension candidates. Maximal degree in co-relation 16054. Up to 1331 conditions per place. [2024-06-21 19:19:17,531 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 293 selfloop transitions, 121 changer transitions 0/416 dead transitions. [2024-06-21 19:19:17,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 416 transitions, 6323 flow [2024-06-21 19:19:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:19:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:19:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 19:19:17,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 19:19:17,533 INFO L175 Difference]: Start difference. First operand has 398 places, 397 transitions, 5186 flow. Second operand 12 states and 148 transitions. [2024-06-21 19:19:17,533 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 416 transitions, 6323 flow [2024-06-21 19:19:19,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 416 transitions, 6163 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:19,051 INFO L231 Difference]: Finished difference. Result has 401 places, 397 transitions, 5273 flow [2024-06-21 19:19:19,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5026, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5273, PETRI_PLACES=401, PETRI_TRANSITIONS=397} [2024-06-21 19:19:19,052 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 371 predicate places. [2024-06-21 19:19:19,052 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 397 transitions, 5273 flow [2024-06-21 19:19:19,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:19,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:19,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:19,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 19:19:19,052 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)] === [2024-06-21 19:19:19,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:19,053 INFO L85 PathProgramCache]: Analyzing trace with hash -827474372, now seen corresponding path program 8 times [2024-06-21 19:19:19,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:19,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177721118] [2024-06-21 19:19:19,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:19,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:19,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:21,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:21,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:21,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177721118] [2024-06-21 19:19:21,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177721118] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:21,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:21,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:21,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188709439] [2024-06-21 19:19:21,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:21,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:21,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:21,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:21,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:21,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:21,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 397 transitions, 5273 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:21,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:21,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:21,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:22,077 INFO L124 PetriNetUnfolderBase]: 1087/1889 cut-off events. [2024-06-21 19:19:22,077 INFO L125 PetriNetUnfolderBase]: For 307623/307623 co-relation queries the response was YES. [2024-06-21 19:19:22,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16412 conditions, 1889 events. 1087/1889 cut-off events. For 307623/307623 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 10759 event pairs, 250 based on Foata normal form. 2/1889 useless extension candidates. Maximal degree in co-relation 16252. Up to 1672 conditions per place. [2024-06-21 19:19:22,096 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 334 selfloop transitions, 77 changer transitions 0/413 dead transitions. [2024-06-21 19:19:22,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 413 transitions, 6186 flow [2024-06-21 19:19:22,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:19:22,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:19:22,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 19:19:22,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 19:19:22,097 INFO L175 Difference]: Start difference. First operand has 401 places, 397 transitions, 5273 flow. Second operand 11 states and 133 transitions. [2024-06-21 19:19:22,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 413 transitions, 6186 flow [2024-06-21 19:19:23,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 413 transitions, 5899 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 19:19:23,426 INFO L231 Difference]: Finished difference. Result has 400 places, 398 transitions, 5162 flow [2024-06-21 19:19:23,427 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5162, PETRI_PLACES=400, PETRI_TRANSITIONS=398} [2024-06-21 19:19:23,427 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 370 predicate places. [2024-06-21 19:19:23,427 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 398 transitions, 5162 flow [2024-06-21 19:19:23,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:23,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:23,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:23,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 19:19:23,428 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)] === [2024-06-21 19:19:23,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:23,428 INFO L85 PathProgramCache]: Analyzing trace with hash -832984622, now seen corresponding path program 9 times [2024-06-21 19:19:23,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:23,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739904095] [2024-06-21 19:19:23,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:23,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:25,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:25,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739904095] [2024-06-21 19:19:25,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739904095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:25,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:25,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:25,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715732666] [2024-06-21 19:19:25,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:25,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:25,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:25,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:25,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:25,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:25,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 398 transitions, 5162 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:25,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:25,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:25,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:26,580 INFO L124 PetriNetUnfolderBase]: 1102/1918 cut-off events. [2024-06-21 19:19:26,580 INFO L125 PetriNetUnfolderBase]: For 326054/326054 co-relation queries the response was YES. [2024-06-21 19:19:26,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16655 conditions, 1918 events. 1102/1918 cut-off events. For 326054/326054 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 11001 event pairs, 251 based on Foata normal form. 2/1918 useless extension candidates. Maximal degree in co-relation 16494. Up to 1672 conditions per place. [2024-06-21 19:19:26,604 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 338 selfloop transitions, 78 changer transitions 0/418 dead transitions. [2024-06-21 19:19:26,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 418 transitions, 6335 flow [2024-06-21 19:19:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:19:26,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:19:26,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 19:19:26,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 19:19:26,606 INFO L175 Difference]: Start difference. First operand has 400 places, 398 transitions, 5162 flow. Second operand 11 states and 136 transitions. [2024-06-21 19:19:26,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 418 transitions, 6335 flow [2024-06-21 19:19:28,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 418 transitions, 6159 flow, removed 8 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:28,161 INFO L231 Difference]: Finished difference. Result has 403 places, 401 transitions, 5198 flow [2024-06-21 19:19:28,161 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=4986, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=398, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5198, PETRI_PLACES=403, PETRI_TRANSITIONS=401} [2024-06-21 19:19:28,161 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 373 predicate places. [2024-06-21 19:19:28,161 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 401 transitions, 5198 flow [2024-06-21 19:19:28,162 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:28,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:28,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:28,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 19:19:28,162 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)] === [2024-06-21 19:19:28,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:28,162 INFO L85 PathProgramCache]: Analyzing trace with hash -832980902, now seen corresponding path program 10 times [2024-06-21 19:19:28,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:28,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127240711] [2024-06-21 19:19:28,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:28,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:30,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:30,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:30,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127240711] [2024-06-21 19:19:30,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127240711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:30,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:30,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:19:30,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339239478] [2024-06-21 19:19:30,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:30,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:19:30,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:30,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:19:30,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:19:30,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:30,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 401 transitions, 5198 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) [2024-06-21 19:19:30,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:30,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:30,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:31,406 INFO L124 PetriNetUnfolderBase]: 1099/1913 cut-off events. [2024-06-21 19:19:31,407 INFO L125 PetriNetUnfolderBase]: For 317975/317975 co-relation queries the response was YES. [2024-06-21 19:19:31,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16464 conditions, 1913 events. 1099/1913 cut-off events. For 317975/317975 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 10952 event pairs, 250 based on Foata normal form. 2/1913 useless extension candidates. Maximal degree in co-relation 16301. Up to 1696 conditions per place. [2024-06-21 19:19:31,431 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 339 selfloop transitions, 75 changer transitions 0/416 dead transitions. [2024-06-21 19:19:31,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 416 transitions, 6101 flow [2024-06-21 19:19:31,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:19:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:19:31,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 19:19:31,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 19:19:31,432 INFO L175 Difference]: Start difference. First operand has 403 places, 401 transitions, 5198 flow. Second operand 12 states and 140 transitions. [2024-06-21 19:19:31,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 416 transitions, 6101 flow [2024-06-21 19:19:32,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 416 transitions, 5984 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-21 19:19:32,967 INFO L231 Difference]: Finished difference. Result has 409 places, 401 transitions, 5235 flow [2024-06-21 19:19:32,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5081, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5235, PETRI_PLACES=409, PETRI_TRANSITIONS=401} [2024-06-21 19:19:32,967 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 379 predicate places. [2024-06-21 19:19:32,967 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 401 transitions, 5235 flow [2024-06-21 19:19:32,968 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) [2024-06-21 19:19:32,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:32,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:32,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 19:19:32,968 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)] === [2024-06-21 19:19:32,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:32,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1241695033, now seen corresponding path program 2 times [2024-06-21 19:19:32,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:32,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577040264] [2024-06-21 19:19:32,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:32,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:34,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:34,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577040264] [2024-06-21 19:19:34,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577040264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:34,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:34,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:34,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081048752] [2024-06-21 19:19:34,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:34,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:34,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:34,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:34,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:34,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:34,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 401 transitions, 5235 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:34,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:34,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:34,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:35,478 INFO L124 PetriNetUnfolderBase]: 1103/1921 cut-off events. [2024-06-21 19:19:35,478 INFO L125 PetriNetUnfolderBase]: For 324674/324674 co-relation queries the response was YES. [2024-06-21 19:19:35,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16643 conditions, 1921 events. 1103/1921 cut-off events. For 324674/324674 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 11060 event pairs, 236 based on Foata normal form. 2/1921 useless extension candidates. Maximal degree in co-relation 16479. Up to 1839 conditions per place. [2024-06-21 19:19:35,504 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 384 selfloop transitions, 30 changer transitions 0/416 dead transitions. [2024-06-21 19:19:35,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 416 transitions, 6127 flow [2024-06-21 19:19:35,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:19:35,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:19:35,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 19:19:35,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 19:19:35,505 INFO L175 Difference]: Start difference. First operand has 409 places, 401 transitions, 5235 flow. Second operand 11 states and 122 transitions. [2024-06-21 19:19:35,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 416 transitions, 6127 flow [2024-06-21 19:19:37,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 416 transitions, 5971 flow, removed 2 selfloop flow, removed 10 redundant places. [2024-06-21 19:19:37,192 INFO L231 Difference]: Finished difference. Result has 410 places, 402 transitions, 5171 flow [2024-06-21 19:19:37,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5079, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=401, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5171, PETRI_PLACES=410, PETRI_TRANSITIONS=402} [2024-06-21 19:19:37,192 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 380 predicate places. [2024-06-21 19:19:37,192 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 402 transitions, 5171 flow [2024-06-21 19:19:37,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:37,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:37,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:37,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 19:19:37,193 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)] === [2024-06-21 19:19:37,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:37,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1241704333, now seen corresponding path program 3 times [2024-06-21 19:19:37,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:37,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458803364] [2024-06-21 19:19:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:37,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:39,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:39,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:39,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458803364] [2024-06-21 19:19:39,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458803364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:39,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:39,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:19:39,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736550468] [2024-06-21 19:19:39,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:39,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:19:39,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:39,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:19:39,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:19:39,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:39,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 402 transitions, 5171 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:39,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:39,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:39,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:39,860 INFO L124 PetriNetUnfolderBase]: 1107/1929 cut-off events. [2024-06-21 19:19:39,860 INFO L125 PetriNetUnfolderBase]: For 328771/328771 co-relation queries the response was YES. [2024-06-21 19:19:39,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16662 conditions, 1929 events. 1107/1929 cut-off events. For 328771/328771 co-relation queries the response was YES. Maximal size of possible extension queue 202. Compared 11134 event pairs, 235 based on Foata normal form. 2/1929 useless extension candidates. Maximal degree in co-relation 16497. Up to 1847 conditions per place. [2024-06-21 19:19:39,886 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 386 selfloop transitions, 29 changer transitions 0/417 dead transitions. [2024-06-21 19:19:39,886 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 417 transitions, 6065 flow [2024-06-21 19:19:39,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:19:39,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:19:39,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 19:19:39,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:19:39,887 INFO L175 Difference]: Start difference. First operand has 410 places, 402 transitions, 5171 flow. Second operand 11 states and 121 transitions. [2024-06-21 19:19:39,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 417 transitions, 6065 flow [2024-06-21 19:19:41,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 417 transitions, 5983 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:41,611 INFO L231 Difference]: Finished difference. Result has 412 places, 403 transitions, 5181 flow [2024-06-21 19:19:41,611 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=402, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5181, PETRI_PLACES=412, PETRI_TRANSITIONS=403} [2024-06-21 19:19:41,611 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 382 predicate places. [2024-06-21 19:19:41,611 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 403 transitions, 5181 flow [2024-06-21 19:19:41,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:41,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:41,612 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:41,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 19:19:41,612 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:19:41,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:41,612 INFO L85 PathProgramCache]: Analyzing trace with hash 206316631, now seen corresponding path program 5 times [2024-06-21 19:19:41,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:41,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774769933] [2024-06-21 19:19:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:41,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:41,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:43,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:43,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774769933] [2024-06-21 19:19:43,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774769933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:43,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:43,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:43,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070262914] [2024-06-21 19:19:43,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:43,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:43,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:43,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:43,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:43,776 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:43,776 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 403 transitions, 5181 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:43,776 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:43,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:43,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:44,636 INFO L124 PetriNetUnfolderBase]: 1113/1939 cut-off events. [2024-06-21 19:19:44,636 INFO L125 PetriNetUnfolderBase]: For 334332/334332 co-relation queries the response was YES. [2024-06-21 19:19:44,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16738 conditions, 1939 events. 1113/1939 cut-off events. For 334332/334332 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 11181 event pairs, 249 based on Foata normal form. 2/1939 useless extension candidates. Maximal degree in co-relation 16572. Up to 1838 conditions per place. [2024-06-21 19:19:44,663 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 384 selfloop transitions, 36 changer transitions 0/422 dead transitions. [2024-06-21 19:19:44,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 422 transitions, 6376 flow [2024-06-21 19:19:44,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:19:44,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:19:44,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 19:19:44,664 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 19:19:44,664 INFO L175 Difference]: Start difference. First operand has 412 places, 403 transitions, 5181 flow. Second operand 12 states and 137 transitions. [2024-06-21 19:19:44,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 422 transitions, 6376 flow [2024-06-21 19:19:46,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 422 transitions, 6294 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:46,319 INFO L231 Difference]: Finished difference. Result has 415 places, 405 transitions, 5218 flow [2024-06-21 19:19:46,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5099, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5218, PETRI_PLACES=415, PETRI_TRANSITIONS=405} [2024-06-21 19:19:46,319 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 385 predicate places. [2024-06-21 19:19:46,319 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 405 transitions, 5218 flow [2024-06-21 19:19:46,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:46,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:46,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:46,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 19:19:46,320 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:19:46,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:46,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1539190229, now seen corresponding path program 4 times [2024-06-21 19:19:46,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:46,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976443739] [2024-06-21 19:19:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:46,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:48,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:48,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976443739] [2024-06-21 19:19:48,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976443739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:48,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:48,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:19:48,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631384703] [2024-06-21 19:19:48,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:48,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:19:48,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:48,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:19:48,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:19:48,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:48,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 405 transitions, 5218 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:48,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:48,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:48,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:49,589 INFO L124 PetriNetUnfolderBase]: 1117/1947 cut-off events. [2024-06-21 19:19:49,589 INFO L125 PetriNetUnfolderBase]: For 341543/341543 co-relation queries the response was YES. [2024-06-21 19:19:49,607 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16835 conditions, 1947 events. 1117/1947 cut-off events. For 341543/341543 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 11252 event pairs, 234 based on Foata normal form. 2/1947 useless extension candidates. Maximal degree in co-relation 16668. Up to 1844 conditions per place. [2024-06-21 19:19:49,612 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 382 selfloop transitions, 37 changer transitions 0/421 dead transitions. [2024-06-21 19:19:49,612 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 421 transitions, 6128 flow [2024-06-21 19:19:49,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:19:49,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:19:49,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 19:19:49,613 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 19:19:49,613 INFO L175 Difference]: Start difference. First operand has 415 places, 405 transitions, 5218 flow. Second operand 11 states and 127 transitions. [2024-06-21 19:19:49,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 421 transitions, 6128 flow [2024-06-21 19:19:51,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 421 transitions, 6026 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 19:19:51,374 INFO L231 Difference]: Finished difference. Result has 416 places, 406 transitions, 5226 flow [2024-06-21 19:19:51,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5116, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5226, PETRI_PLACES=416, PETRI_TRANSITIONS=406} [2024-06-21 19:19:51,374 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 386 predicate places. [2024-06-21 19:19:51,374 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 406 transitions, 5226 flow [2024-06-21 19:19:51,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:19:51,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:51,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:51,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 19:19:51,375 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:19:51,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:51,375 INFO L85 PathProgramCache]: Analyzing trace with hash 1040338377, now seen corresponding path program 6 times [2024-06-21 19:19:51,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:51,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081051455] [2024-06-21 19:19:51,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:51,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:51,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:53,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:53,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081051455] [2024-06-21 19:19:53,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081051455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:53,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:53,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:19:53,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732591755] [2024-06-21 19:19:53,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:53,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:19:53,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:53,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:19:53,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:19:53,830 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:53,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 406 transitions, 5226 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) [2024-06-21 19:19:53,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:53,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:53,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:54,884 INFO L124 PetriNetUnfolderBase]: 1123/1957 cut-off events. [2024-06-21 19:19:54,885 INFO L125 PetriNetUnfolderBase]: For 345789/345789 co-relation queries the response was YES. [2024-06-21 19:19:54,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16924 conditions, 1957 events. 1123/1957 cut-off events. For 345789/345789 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 11342 event pairs, 231 based on Foata normal form. 2/1957 useless extension candidates. Maximal degree in co-relation 16756. Up to 1717 conditions per place. [2024-06-21 19:19:54,911 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 363 selfloop transitions, 66 changer transitions 0/431 dead transitions. [2024-06-21 19:19:54,911 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 431 transitions, 6740 flow [2024-06-21 19:19:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:19:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:19:54,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 148 transitions. [2024-06-21 19:19:54,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3978494623655914 [2024-06-21 19:19:54,912 INFO L175 Difference]: Start difference. First operand has 416 places, 406 transitions, 5226 flow. Second operand 12 states and 148 transitions. [2024-06-21 19:19:54,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 431 transitions, 6740 flow [2024-06-21 19:19:56,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 431 transitions, 6640 flow, removed 14 selfloop flow, removed 9 redundant places. [2024-06-21 19:19:56,594 INFO L231 Difference]: Finished difference. Result has 419 places, 408 transitions, 5305 flow [2024-06-21 19:19:56,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5126, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5305, PETRI_PLACES=419, PETRI_TRANSITIONS=408} [2024-06-21 19:19:56,594 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 389 predicate places. [2024-06-21 19:19:56,594 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 408 transitions, 5305 flow [2024-06-21 19:19:56,594 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) [2024-06-21 19:19:56,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:19:56,595 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:19:56,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 19:19:56,595 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:19:56,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:19:56,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1725036830, now seen corresponding path program 11 times [2024-06-21 19:19:56,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:19:56,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395473946] [2024-06-21 19:19:56,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:19:56,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:19:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:19:58,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:19:58,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:19:58,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395473946] [2024-06-21 19:19:58,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395473946] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:19:58,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:19:58,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:19:58,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203309928] [2024-06-21 19:19:58,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:19:58,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:19:58,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:19:58,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:19:58,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:19:59,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:19:59,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 408 transitions, 5305 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) [2024-06-21 19:19:59,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:19:59,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:19:59,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:19:59,739 INFO L124 PetriNetUnfolderBase]: 1127/1965 cut-off events. [2024-06-21 19:19:59,739 INFO L125 PetriNetUnfolderBase]: For 351600/351600 co-relation queries the response was YES. [2024-06-21 19:19:59,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17065 conditions, 1965 events. 1127/1965 cut-off events. For 351600/351600 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 11382 event pairs, 260 based on Foata normal form. 2/1965 useless extension candidates. Maximal degree in co-relation 16896. Up to 1903 conditions per place. [2024-06-21 19:19:59,765 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 392 selfloop transitions, 29 changer transitions 0/423 dead transitions. [2024-06-21 19:19:59,765 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 423 transitions, 6251 flow [2024-06-21 19:19:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:19:59,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:19:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 19:19:59,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 19:19:59,766 INFO L175 Difference]: Start difference. First operand has 419 places, 408 transitions, 5305 flow. Second operand 12 states and 128 transitions. [2024-06-21 19:19:59,766 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 423 transitions, 6251 flow [2024-06-21 19:20:01,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 423 transitions, 6093 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-21 19:20:01,510 INFO L231 Difference]: Finished difference. Result has 422 places, 411 transitions, 5292 flow [2024-06-21 19:20:01,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5147, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5292, PETRI_PLACES=422, PETRI_TRANSITIONS=411} [2024-06-21 19:20:01,510 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 392 predicate places. [2024-06-21 19:20:01,510 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 411 transitions, 5292 flow [2024-06-21 19:20:01,511 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) [2024-06-21 19:20:01,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:01,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:01,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 19:20:01,511 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:01,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:01,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1234285723, now seen corresponding path program 5 times [2024-06-21 19:20:01,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:01,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301165155] [2024-06-21 19:20:01,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:01,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:01,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:03,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:03,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301165155] [2024-06-21 19:20:03,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301165155] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:03,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:03,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:03,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632934501] [2024-06-21 19:20:03,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:03,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:03,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:03,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:03,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:03,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:03,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 411 transitions, 5292 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:03,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:03,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:03,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:04,444 INFO L124 PetriNetUnfolderBase]: 1131/1973 cut-off events. [2024-06-21 19:20:04,444 INFO L125 PetriNetUnfolderBase]: For 357701/357701 co-relation queries the response was YES. [2024-06-21 19:20:04,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17078 conditions, 1973 events. 1131/1973 cut-off events. For 357701/357701 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 11468 event pairs, 239 based on Foata normal form. 2/1973 useless extension candidates. Maximal degree in co-relation 16907. Up to 1882 conditions per place. [2024-06-21 19:20:04,471 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 392 selfloop transitions, 33 changer transitions 0/427 dead transitions. [2024-06-21 19:20:04,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 427 transitions, 6216 flow [2024-06-21 19:20:04,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:20:04,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:20:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 19:20:04,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 19:20:04,472 INFO L175 Difference]: Start difference. First operand has 422 places, 411 transitions, 5292 flow. Second operand 11 states and 125 transitions. [2024-06-21 19:20:04,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 427 transitions, 6216 flow [2024-06-21 19:20:06,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 427 transitions, 6110 flow, removed 26 selfloop flow, removed 9 redundant places. [2024-06-21 19:20:06,280 INFO L231 Difference]: Finished difference. Result has 424 places, 412 transitions, 5290 flow [2024-06-21 19:20:06,280 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5186, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=411, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5290, PETRI_PLACES=424, PETRI_TRANSITIONS=412} [2024-06-21 19:20:06,280 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 394 predicate places. [2024-06-21 19:20:06,280 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 412 transitions, 5290 flow [2024-06-21 19:20:06,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:06,281 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:06,281 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:06,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 19:20:06,281 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:06,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:06,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1234277787, now seen corresponding path program 7 times [2024-06-21 19:20:06,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:06,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833474552] [2024-06-21 19:20:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:06,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:08,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:08,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833474552] [2024-06-21 19:20:08,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833474552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:08,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:08,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:08,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392820245] [2024-06-21 19:20:08,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:08,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:08,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:08,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:08,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:08,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:08,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 412 transitions, 5290 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:08,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:08,932 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:08,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:09,966 INFO L124 PetriNetUnfolderBase]: 1127/1967 cut-off events. [2024-06-21 19:20:09,966 INFO L125 PetriNetUnfolderBase]: For 348752/348752 co-relation queries the response was YES. [2024-06-21 19:20:09,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16813 conditions, 1967 events. 1127/1967 cut-off events. For 348752/348752 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 11412 event pairs, 251 based on Foata normal form. 2/1967 useless extension candidates. Maximal degree in co-relation 16641. Up to 1869 conditions per place. [2024-06-21 19:20:09,994 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 387 selfloop transitions, 38 changer transitions 0/427 dead transitions. [2024-06-21 19:20:09,995 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 427 transitions, 6182 flow [2024-06-21 19:20:09,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:20:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:20:09,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 19:20:09,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 19:20:09,996 INFO L175 Difference]: Start difference. First operand has 424 places, 412 transitions, 5290 flow. Second operand 12 states and 137 transitions. [2024-06-21 19:20:09,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 427 transitions, 6182 flow [2024-06-21 19:20:11,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 427 transitions, 6070 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 19:20:11,701 INFO L231 Difference]: Finished difference. Result has 427 places, 412 transitions, 5259 flow [2024-06-21 19:20:11,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5178, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5259, PETRI_PLACES=427, PETRI_TRANSITIONS=412} [2024-06-21 19:20:11,702 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 397 predicate places. [2024-06-21 19:20:11,702 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 412 transitions, 5259 flow [2024-06-21 19:20:11,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:11,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:11,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:11,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 19:20:11,702 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:11,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:11,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1040136567, now seen corresponding path program 8 times [2024-06-21 19:20:11,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:11,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122522672] [2024-06-21 19:20:11,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:11,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:11,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:14,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:14,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:14,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122522672] [2024-06-21 19:20:14,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122522672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:14,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:14,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:20:14,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534842681] [2024-06-21 19:20:14,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:14,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:20:14,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:20:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:20:14,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:14,186 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 412 transitions, 5259 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) [2024-06-21 19:20:14,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:14,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:14,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:15,100 INFO L124 PetriNetUnfolderBase]: 1123/1961 cut-off events. [2024-06-21 19:20:15,100 INFO L125 PetriNetUnfolderBase]: For 339185/339185 co-relation queries the response was YES. [2024-06-21 19:20:15,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16520 conditions, 1961 events. 1123/1961 cut-off events. For 339185/339185 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 11417 event pairs, 250 based on Foata normal form. 2/1961 useless extension candidates. Maximal degree in co-relation 16347. Up to 1772 conditions per place. [2024-06-21 19:20:15,122 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 375 selfloop transitions, 55 changer transitions 0/432 dead transitions. [2024-06-21 19:20:15,122 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 432 transitions, 6501 flow [2024-06-21 19:20:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:20:15,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:20:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 145 transitions. [2024-06-21 19:20:15,123 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3897849462365591 [2024-06-21 19:20:15,123 INFO L175 Difference]: Start difference. First operand has 427 places, 412 transitions, 5259 flow. Second operand 12 states and 145 transitions. [2024-06-21 19:20:15,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 432 transitions, 6501 flow [2024-06-21 19:20:16,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 432 transitions, 6378 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-21 19:20:16,888 INFO L231 Difference]: Finished difference. Result has 427 places, 412 transitions, 5251 flow [2024-06-21 19:20:16,888 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5136, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5251, PETRI_PLACES=427, PETRI_TRANSITIONS=412} [2024-06-21 19:20:16,888 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 397 predicate places. [2024-06-21 19:20:16,888 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 412 transitions, 5251 flow [2024-06-21 19:20:16,888 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) [2024-06-21 19:20:16,888 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:16,889 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:16,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 19:20:16,889 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:16,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:16,889 INFO L85 PathProgramCache]: Analyzing trace with hash 1531097420, now seen corresponding path program 12 times [2024-06-21 19:20:16,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:16,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443847439] [2024-06-21 19:20:16,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:16,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:16,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:18,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:18,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443847439] [2024-06-21 19:20:18,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443847439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:18,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:18,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:18,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531430305] [2024-06-21 19:20:18,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:18,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:18,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:18,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:18,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:18,990 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:18,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 412 transitions, 5251 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:18,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:18,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:18,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:19,749 INFO L124 PetriNetUnfolderBase]: 1127/1969 cut-off events. [2024-06-21 19:20:19,749 INFO L125 PetriNetUnfolderBase]: For 344517/344517 co-relation queries the response was YES. [2024-06-21 19:20:19,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16625 conditions, 1969 events. 1127/1969 cut-off events. For 344517/344517 co-relation queries the response was YES. Maximal size of possible extension queue 213. Compared 11438 event pairs, 258 based on Foata normal form. 2/1969 useless extension candidates. Maximal degree in co-relation 16451. Up to 1881 conditions per place. [2024-06-21 19:20:19,775 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 389 selfloop transitions, 38 changer transitions 0/429 dead transitions. [2024-06-21 19:20:19,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 429 transitions, 6266 flow [2024-06-21 19:20:19,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:20:19,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:20:19,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 19:20:19,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 19:20:19,776 INFO L175 Difference]: Start difference. First operand has 427 places, 412 transitions, 5251 flow. Second operand 11 states and 128 transitions. [2024-06-21 19:20:19,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 429 transitions, 6266 flow [2024-06-21 19:20:21,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 425 places, 429 transitions, 6123 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 19:20:21,370 INFO L231 Difference]: Finished difference. Result has 427 places, 415 transitions, 5277 flow [2024-06-21 19:20:21,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5112, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=375, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5277, PETRI_PLACES=427, PETRI_TRANSITIONS=415} [2024-06-21 19:20:21,371 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 397 predicate places. [2024-06-21 19:20:21,371 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 415 transitions, 5277 flow [2024-06-21 19:20:21,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:21,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:21,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:21,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 19:20:21,372 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:21,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:21,372 INFO L85 PathProgramCache]: Analyzing trace with hash 6861236, now seen corresponding path program 13 times [2024-06-21 19:20:21,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:21,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576106525] [2024-06-21 19:20:21,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:21,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:23,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:23,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576106525] [2024-06-21 19:20:23,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576106525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:23,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:23,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:23,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758594129] [2024-06-21 19:20:23,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:23,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:23,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:23,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:23,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:23,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:23,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 415 transitions, 5277 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:23,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:23,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:23,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:24,619 INFO L124 PetriNetUnfolderBase]: 1142/1998 cut-off events. [2024-06-21 19:20:24,619 INFO L125 PetriNetUnfolderBase]: For 365707/365707 co-relation queries the response was YES. [2024-06-21 19:20:24,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17040 conditions, 1998 events. 1142/1998 cut-off events. For 365707/365707 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 11662 event pairs, 259 based on Foata normal form. 2/1998 useless extension candidates. Maximal degree in co-relation 16864. Up to 1881 conditions per place. [2024-06-21 19:20:24,645 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 388 selfloop transitions, 45 changer transitions 0/435 dead transitions. [2024-06-21 19:20:24,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 437 places, 435 transitions, 6545 flow [2024-06-21 19:20:24,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:20:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:20:24,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 128 transitions. [2024-06-21 19:20:24,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375366568914956 [2024-06-21 19:20:24,647 INFO L175 Difference]: Start difference. First operand has 427 places, 415 transitions, 5277 flow. Second operand 11 states and 128 transitions. [2024-06-21 19:20:24,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 437 places, 435 transitions, 6545 flow [2024-06-21 19:20:26,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 435 transitions, 6415 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 19:20:26,464 INFO L231 Difference]: Finished difference. Result has 432 places, 421 transitions, 5391 flow [2024-06-21 19:20:26,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5149, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5391, PETRI_PLACES=432, PETRI_TRANSITIONS=421} [2024-06-21 19:20:26,464 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 402 predicate places. [2024-06-21 19:20:26,464 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 421 transitions, 5391 flow [2024-06-21 19:20:26,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:26,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:26,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:26,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 19:20:26,465 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:26,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:26,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1034624302, now seen corresponding path program 14 times [2024-06-21 19:20:26,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:26,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610452640] [2024-06-21 19:20:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:26,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:28,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:28,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:28,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610452640] [2024-06-21 19:20:28,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610452640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:28,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:28,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:28,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458863747] [2024-06-21 19:20:28,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:28,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:28,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:28,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:28,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:28,372 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:28,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 421 transitions, 5391 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:28,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:28,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:28,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:29,120 INFO L124 PetriNetUnfolderBase]: 1149/2011 cut-off events. [2024-06-21 19:20:29,121 INFO L125 PetriNetUnfolderBase]: For 371947/371947 co-relation queries the response was YES. [2024-06-21 19:20:29,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17217 conditions, 2011 events. 1149/2011 cut-off events. For 371947/371947 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 11794 event pairs, 261 based on Foata normal form. 2/2011 useless extension candidates. Maximal degree in co-relation 17038. Up to 1922 conditions per place. [2024-06-21 19:20:29,148 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 390 selfloop transitions, 44 changer transitions 0/436 dead transitions. [2024-06-21 19:20:29,148 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 436 transitions, 6350 flow [2024-06-21 19:20:29,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:20:29,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:20:29,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 19:20:29,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 19:20:29,152 INFO L175 Difference]: Start difference. First operand has 432 places, 421 transitions, 5391 flow. Second operand 11 states and 126 transitions. [2024-06-21 19:20:29,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 436 transitions, 6350 flow [2024-06-21 19:20:30,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 436 transitions, 6229 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-21 19:20:30,890 INFO L231 Difference]: Finished difference. Result has 438 places, 424 transitions, 5427 flow [2024-06-21 19:20:30,890 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5282, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=421, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5427, PETRI_PLACES=438, PETRI_TRANSITIONS=424} [2024-06-21 19:20:30,891 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 408 predicate places. [2024-06-21 19:20:30,891 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 424 transitions, 5427 flow [2024-06-21 19:20:30,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:30,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:30,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:30,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 19:20:30,915 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:30,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:30,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1034774187, now seen corresponding path program 9 times [2024-06-21 19:20:30,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:30,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358137097] [2024-06-21 19:20:30,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:30,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:33,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:33,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:33,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358137097] [2024-06-21 19:20:33,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358137097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:33,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:33,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:20:33,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311614246] [2024-06-21 19:20:33,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:33,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:20:33,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:33,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:20:33,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:20:33,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:33,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 424 transitions, 5427 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) [2024-06-21 19:20:33,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:33,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:33,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:34,267 INFO L124 PetriNetUnfolderBase]: 1145/2005 cut-off events. [2024-06-21 19:20:34,267 INFO L125 PetriNetUnfolderBase]: For 362000/362000 co-relation queries the response was YES. [2024-06-21 19:20:34,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16880 conditions, 2005 events. 1145/2005 cut-off events. For 362000/362000 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 11761 event pairs, 250 based on Foata normal form. 2/2005 useless extension candidates. Maximal degree in co-relation 16699. Up to 1816 conditions per place. [2024-06-21 19:20:34,294 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 377 selfloop transitions, 60 changer transitions 0/439 dead transitions. [2024-06-21 19:20:34,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 439 transitions, 6343 flow [2024-06-21 19:20:34,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:20:34,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:20:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 140 transitions. [2024-06-21 19:20:34,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3763440860215054 [2024-06-21 19:20:34,296 INFO L175 Difference]: Start difference. First operand has 438 places, 424 transitions, 5427 flow. Second operand 12 states and 140 transitions. [2024-06-21 19:20:34,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 439 transitions, 6343 flow [2024-06-21 19:20:36,110 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 439 transitions, 6231 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 19:20:36,115 INFO L231 Difference]: Finished difference. Result has 442 places, 424 transitions, 5440 flow [2024-06-21 19:20:36,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5315, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=364, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5440, PETRI_PLACES=442, PETRI_TRANSITIONS=424} [2024-06-21 19:20:36,115 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 412 predicate places. [2024-06-21 19:20:36,116 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 424 transitions, 5440 flow [2024-06-21 19:20:36,116 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) [2024-06-21 19:20:36,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:36,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:36,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 19:20:36,116 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:36,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:36,116 INFO L85 PathProgramCache]: Analyzing trace with hash 1034768452, now seen corresponding path program 15 times [2024-06-21 19:20:36,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:36,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410679371] [2024-06-21 19:20:36,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:36,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:37,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:37,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:37,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410679371] [2024-06-21 19:20:37,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410679371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:37,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:37,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:37,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828442780] [2024-06-21 19:20:37,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:37,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:37,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:37,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:37,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:38,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:38,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 424 transitions, 5440 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:38,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:38,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:38,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:38,855 INFO L124 PetriNetUnfolderBase]: 1142/2000 cut-off events. [2024-06-21 19:20:38,855 INFO L125 PetriNetUnfolderBase]: For 350465/350465 co-relation queries the response was YES. [2024-06-21 19:20:38,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16668 conditions, 2000 events. 1142/2000 cut-off events. For 350465/350465 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 11734 event pairs, 257 based on Foata normal form. 2/2000 useless extension candidates. Maximal degree in co-relation 16486. Up to 1911 conditions per place. [2024-06-21 19:20:38,884 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 392 selfloop transitions, 42 changer transitions 0/436 dead transitions. [2024-06-21 19:20:38,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 436 transitions, 6336 flow [2024-06-21 19:20:38,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:20:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:20:38,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 19:20:38,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 19:20:38,886 INFO L175 Difference]: Start difference. First operand has 442 places, 424 transitions, 5440 flow. Second operand 11 states and 127 transitions. [2024-06-21 19:20:38,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 436 transitions, 6336 flow [2024-06-21 19:20:40,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 436 transitions, 6195 flow, removed 7 selfloop flow, removed 11 redundant places. [2024-06-21 19:20:40,763 INFO L231 Difference]: Finished difference. Result has 442 places, 424 transitions, 5387 flow [2024-06-21 19:20:40,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5299, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5387, PETRI_PLACES=442, PETRI_TRANSITIONS=424} [2024-06-21 19:20:40,764 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 412 predicate places. [2024-06-21 19:20:40,764 INFO L495 AbstractCegarLoop]: Abstraction has has 442 places, 424 transitions, 5387 flow [2024-06-21 19:20:40,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:40,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:40,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:40,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 19:20:40,765 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:40,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:40,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1661747753, now seen corresponding path program 6 times [2024-06-21 19:20:40,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:40,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109022562] [2024-06-21 19:20:40,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:40,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:42,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:42,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109022562] [2024-06-21 19:20:42,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109022562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:42,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:42,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:42,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377316473] [2024-06-21 19:20:42,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:42,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:42,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:42,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:42,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:43,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:43,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 442 places, 424 transitions, 5387 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:43,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:43,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:43,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:43,852 INFO L124 PetriNetUnfolderBase]: 1146/2007 cut-off events. [2024-06-21 19:20:43,852 INFO L125 PetriNetUnfolderBase]: For 357494/357494 co-relation queries the response was YES. [2024-06-21 19:20:43,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16709 conditions, 2007 events. 1146/2007 cut-off events. For 357494/357494 co-relation queries the response was YES. Maximal size of possible extension queue 221. Compared 11813 event pairs, 242 based on Foata normal form. 2/2007 useless extension candidates. Maximal degree in co-relation 16526. Up to 1896 conditions per place. [2024-06-21 19:20:43,879 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 394 selfloop transitions, 42 changer transitions 0/438 dead transitions. [2024-06-21 19:20:43,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 438 transitions, 6327 flow [2024-06-21 19:20:43,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:20:43,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:20:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 121 transitions. [2024-06-21 19:20:43,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:20:43,881 INFO L175 Difference]: Start difference. First operand has 442 places, 424 transitions, 5387 flow. Second operand 11 states and 121 transitions. [2024-06-21 19:20:43,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 438 transitions, 6327 flow [2024-06-21 19:20:45,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 438 transitions, 6229 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-21 19:20:45,798 INFO L231 Difference]: Finished difference. Result has 443 places, 425 transitions, 5413 flow [2024-06-21 19:20:45,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5289, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5413, PETRI_PLACES=443, PETRI_TRANSITIONS=425} [2024-06-21 19:20:45,798 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 413 predicate places. [2024-06-21 19:20:45,799 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 425 transitions, 5413 flow [2024-06-21 19:20:45,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:45,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:45,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:45,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 19:20:45,799 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:45,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:45,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1380766409, now seen corresponding path program 10 times [2024-06-21 19:20:45,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:45,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731753932] [2024-06-21 19:20:45,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:45,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:45,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:47,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:47,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731753932] [2024-06-21 19:20:47,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731753932] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:47,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:47,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:47,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932851698] [2024-06-21 19:20:47,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:47,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:47,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:47,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:47,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:48,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:48,005 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 425 transitions, 5413 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:48,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:48,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:48,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:49,024 INFO L124 PetriNetUnfolderBase]: 1152/2017 cut-off events. [2024-06-21 19:20:49,025 INFO L125 PetriNetUnfolderBase]: For 361489/361489 co-relation queries the response was YES. [2024-06-21 19:20:49,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16822 conditions, 2017 events. 1152/2017 cut-off events. For 361489/361489 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 11867 event pairs, 243 based on Foata normal form. 2/2017 useless extension candidates. Maximal degree in co-relation 16640. Up to 1866 conditions per place. [2024-06-21 19:20:49,051 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 400 selfloop transitions, 42 changer transitions 0/444 dead transitions. [2024-06-21 19:20:49,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 444 transitions, 6684 flow [2024-06-21 19:20:49,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:20:49,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:20:49,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 134 transitions. [2024-06-21 19:20:49,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3602150537634409 [2024-06-21 19:20:49,053 INFO L175 Difference]: Start difference. First operand has 443 places, 425 transitions, 5413 flow. Second operand 12 states and 134 transitions. [2024-06-21 19:20:49,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 444 transitions, 6684 flow [2024-06-21 19:20:50,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 444 transitions, 6570 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-21 19:20:50,763 INFO L231 Difference]: Finished difference. Result has 446 places, 427 transitions, 5434 flow [2024-06-21 19:20:50,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5299, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5434, PETRI_PLACES=446, PETRI_TRANSITIONS=427} [2024-06-21 19:20:50,764 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 416 predicate places. [2024-06-21 19:20:50,764 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 427 transitions, 5434 flow [2024-06-21 19:20:50,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:50,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:50,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:50,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 19:20:50,765 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:50,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:50,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1334864439, now seen corresponding path program 11 times [2024-06-21 19:20:50,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:50,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430711420] [2024-06-21 19:20:50,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:50,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:50,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:53,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:53,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430711420] [2024-06-21 19:20:53,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430711420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:53,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:53,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:53,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455015879] [2024-06-21 19:20:53,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:53,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:53,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:53,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:53,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:53,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:53,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 427 transitions, 5434 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:53,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:53,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:53,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:54,588 INFO L124 PetriNetUnfolderBase]: 1158/2027 cut-off events. [2024-06-21 19:20:54,588 INFO L125 PetriNetUnfolderBase]: For 366622/366622 co-relation queries the response was YES. [2024-06-21 19:20:54,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16891 conditions, 2027 events. 1158/2027 cut-off events. For 366622/366622 co-relation queries the response was YES. Maximal size of possible extension queue 223. Compared 11936 event pairs, 235 based on Foata normal form. 2/2027 useless extension candidates. Maximal degree in co-relation 16708. Up to 1693 conditions per place. [2024-06-21 19:20:54,622 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 368 selfloop transitions, 79 changer transitions 0/449 dead transitions. [2024-06-21 19:20:54,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 449 transitions, 7022 flow [2024-06-21 19:20:54,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:20:54,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:20:54,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 136 transitions. [2024-06-21 19:20:54,624 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39882697947214074 [2024-06-21 19:20:54,624 INFO L175 Difference]: Start difference. First operand has 446 places, 427 transitions, 5434 flow. Second operand 11 states and 136 transitions. [2024-06-21 19:20:54,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 449 transitions, 7022 flow [2024-06-21 19:20:56,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 449 transitions, 6931 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 19:20:56,740 INFO L231 Difference]: Finished difference. Result has 448 places, 429 transitions, 5552 flow [2024-06-21 19:20:56,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5343, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=350, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5552, PETRI_PLACES=448, PETRI_TRANSITIONS=429} [2024-06-21 19:20:56,741 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 418 predicate places. [2024-06-21 19:20:56,741 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 429 transitions, 5552 flow [2024-06-21 19:20:56,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:56,741 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:20:56,741 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:20:56,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 19:20:56,741 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:20:56,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:20:56,742 INFO L85 PathProgramCache]: Analyzing trace with hash 798248363, now seen corresponding path program 7 times [2024-06-21 19:20:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:20:56,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176120397] [2024-06-21 19:20:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:20:56,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:20:56,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:20:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:20:58,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:20:58,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176120397] [2024-06-21 19:20:58,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176120397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:20:58,404 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:20:58,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:20:58,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373701230] [2024-06-21 19:20:58,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:20:58,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:20:58,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:20:58,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:20:58,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:20:58,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:20:58,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 429 transitions, 5552 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:20:58,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:20:58,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:20:58,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:20:59,193 INFO L124 PetriNetUnfolderBase]: 1162/2035 cut-off events. [2024-06-21 19:20:59,193 INFO L125 PetriNetUnfolderBase]: For 373300/373300 co-relation queries the response was YES. [2024-06-21 19:20:59,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17111 conditions, 2035 events. 1162/2035 cut-off events. For 373300/373300 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 11987 event pairs, 260 based on Foata normal form. 2/2035 useless extension candidates. Maximal degree in co-relation 16927. Up to 1989 conditions per place. [2024-06-21 19:20:59,219 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 417 selfloop transitions, 21 changer transitions 0/440 dead transitions. [2024-06-21 19:20:59,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 440 transitions, 6486 flow [2024-06-21 19:20:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:20:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:20:59,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 108 transitions. [2024-06-21 19:20:59,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34838709677419355 [2024-06-21 19:20:59,221 INFO L175 Difference]: Start difference. First operand has 448 places, 429 transitions, 5552 flow. Second operand 10 states and 108 transitions. [2024-06-21 19:20:59,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 440 transitions, 6486 flow [2024-06-21 19:21:00,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 440 transitions, 6298 flow, removed 15 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:00,968 INFO L231 Difference]: Finished difference. Result has 449 places, 430 transitions, 5449 flow [2024-06-21 19:21:00,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5364, PETRI_DIFFERENCE_MINUEND_PLACES=439, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5449, PETRI_PLACES=449, PETRI_TRANSITIONS=430} [2024-06-21 19:21:00,969 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 419 predicate places. [2024-06-21 19:21:00,969 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 430 transitions, 5449 flow [2024-06-21 19:21:00,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:00,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:00,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:00,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 19:21:00,970 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:00,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:00,970 INFO L85 PathProgramCache]: Analyzing trace with hash 798517133, now seen corresponding path program 8 times [2024-06-21 19:21:00,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:00,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034747212] [2024-06-21 19:21:00,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:00,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:00,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:02,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:02,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:02,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034747212] [2024-06-21 19:21:02,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034747212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:02,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:02,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:02,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229209457] [2024-06-21 19:21:02,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:02,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:02,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:02,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:02,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:02,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 430 transitions, 5449 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:02,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:02,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:02,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:03,387 INFO L124 PetriNetUnfolderBase]: 1170/2051 cut-off events. [2024-06-21 19:21:03,387 INFO L125 PetriNetUnfolderBase]: For 378508/378508 co-relation queries the response was YES. [2024-06-21 19:21:03,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17058 conditions, 2051 events. 1170/2051 cut-off events. For 378508/378508 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 12130 event pairs, 260 based on Foata normal form. 2/2051 useless extension candidates. Maximal degree in co-relation 16873. Up to 2008 conditions per place. [2024-06-21 19:21:03,415 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 424 selfloop transitions, 17 changer transitions 0/443 dead transitions. [2024-06-21 19:21:03,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 443 transitions, 6396 flow [2024-06-21 19:21:03,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:21:03,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:21:03,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 113 transitions. [2024-06-21 19:21:03,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3313782991202346 [2024-06-21 19:21:03,416 INFO L175 Difference]: Start difference. First operand has 449 places, 430 transitions, 5449 flow. Second operand 11 states and 113 transitions. [2024-06-21 19:21:03,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 443 transitions, 6396 flow [2024-06-21 19:21:05,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 443 transitions, 6290 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:05,336 INFO L231 Difference]: Finished difference. Result has 452 places, 432 transitions, 5428 flow [2024-06-21 19:21:05,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5343, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5428, PETRI_PLACES=452, PETRI_TRANSITIONS=432} [2024-06-21 19:21:05,337 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 422 predicate places. [2024-06-21 19:21:05,337 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 432 transitions, 5428 flow [2024-06-21 19:21:05,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:05,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:05,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:05,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 19:21:05,337 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:05,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:05,338 INFO L85 PathProgramCache]: Analyzing trace with hash 798507554, now seen corresponding path program 1 times [2024-06-21 19:21:05,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:05,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102057011] [2024-06-21 19:21:05,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:05,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:05,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:06,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:06,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102057011] [2024-06-21 19:21:06,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102057011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:06,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:06,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:06,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26499429] [2024-06-21 19:21:06,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:06,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:06,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:06,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:06,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:07,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:07,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 432 transitions, 5428 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:07,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:07,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:07,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:07,864 INFO L124 PetriNetUnfolderBase]: 1167/2047 cut-off events. [2024-06-21 19:21:07,865 INFO L125 PetriNetUnfolderBase]: For 375123/375123 co-relation queries the response was YES. [2024-06-21 19:21:07,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16578 conditions, 2047 events. 1167/2047 cut-off events. For 375123/375123 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 12105 event pairs, 259 based on Foata normal form. 4/2049 useless extension candidates. Maximal degree in co-relation 16391. Up to 1972 conditions per place. [2024-06-21 19:21:07,894 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 413 selfloop transitions, 34 changer transitions 0/449 dead transitions. [2024-06-21 19:21:07,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 449 transitions, 6501 flow [2024-06-21 19:21:07,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 125 transitions. [2024-06-21 19:21:07,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.33602150537634407 [2024-06-21 19:21:07,896 INFO L175 Difference]: Start difference. First operand has 452 places, 432 transitions, 5428 flow. Second operand 12 states and 125 transitions. [2024-06-21 19:21:07,896 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 449 transitions, 6501 flow [2024-06-21 19:21:09,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 449 transitions, 6417 flow, removed 27 selfloop flow, removed 8 redundant places. [2024-06-21 19:21:09,725 INFO L231 Difference]: Finished difference. Result has 456 places, 436 transitions, 5526 flow [2024-06-21 19:21:09,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5350, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5526, PETRI_PLACES=456, PETRI_TRANSITIONS=436} [2024-06-21 19:21:09,726 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 426 predicate places. [2024-06-21 19:21:09,726 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 436 transitions, 5526 flow [2024-06-21 19:21:09,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:09,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:09,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:09,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 19:21:09,726 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:09,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:09,727 INFO L85 PathProgramCache]: Analyzing trace with hash 542937145, now seen corresponding path program 9 times [2024-06-21 19:21:09,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:09,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924375012] [2024-06-21 19:21:09,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:09,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:09,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:11,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:11,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924375012] [2024-06-21 19:21:11,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924375012] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:11,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:11,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:11,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621432209] [2024-06-21 19:21:11,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:11,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:11,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:11,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:11,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:12,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:12,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 436 transitions, 5526 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:12,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:12,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:12,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:12,912 INFO L124 PetriNetUnfolderBase]: 1171/2055 cut-off events. [2024-06-21 19:21:12,913 INFO L125 PetriNetUnfolderBase]: For 365228/365228 co-relation queries the response was YES. [2024-06-21 19:21:12,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16658 conditions, 2055 events. 1171/2055 cut-off events. For 365228/365228 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 12182 event pairs, 255 based on Foata normal form. 2/2055 useless extension candidates. Maximal degree in co-relation 16470. Up to 1985 conditions per place. [2024-06-21 19:21:12,940 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 419 selfloop transitions, 29 changer transitions 0/450 dead transitions. [2024-06-21 19:21:12,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 450 transitions, 6496 flow [2024-06-21 19:21:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:21:12,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:21:12,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 19:21:12,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-21 19:21:12,941 INFO L175 Difference]: Start difference. First operand has 456 places, 436 transitions, 5526 flow. Second operand 11 states and 118 transitions. [2024-06-21 19:21:12,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 450 transitions, 6496 flow [2024-06-21 19:21:14,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 450 transitions, 6305 flow, removed 27 selfloop flow, removed 11 redundant places. [2024-06-21 19:21:14,812 INFO L231 Difference]: Finished difference. Result has 456 places, 437 transitions, 5439 flow [2024-06-21 19:21:14,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5335, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=436, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5439, PETRI_PLACES=456, PETRI_TRANSITIONS=437} [2024-06-21 19:21:14,812 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 426 predicate places. [2024-06-21 19:21:14,812 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 437 transitions, 5439 flow [2024-06-21 19:21:14,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:14,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:14,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:14,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 19:21:14,813 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:14,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:14,813 INFO L85 PathProgramCache]: Analyzing trace with hash 542727399, now seen corresponding path program 12 times [2024-06-21 19:21:14,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:14,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306511597] [2024-06-21 19:21:14,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:14,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:14,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:16,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:16,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:16,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306511597] [2024-06-21 19:21:16,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306511597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:16,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:16,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:16,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009914491] [2024-06-21 19:21:16,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:16,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:16,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:16,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:16,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:16,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:16,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 437 transitions, 5439 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:16,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:16,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:16,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:17,687 INFO L124 PetriNetUnfolderBase]: 1167/2049 cut-off events. [2024-06-21 19:21:17,687 INFO L125 PetriNetUnfolderBase]: For 352094/352094 co-relation queries the response was YES. [2024-06-21 19:21:17,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16165 conditions, 2049 events. 1167/2049 cut-off events. For 352094/352094 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 12196 event pairs, 246 based on Foata normal form. 2/2049 useless extension candidates. Maximal degree in co-relation 15977. Up to 1941 conditions per place. [2024-06-21 19:21:17,716 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 413 selfloop transitions, 39 changer transitions 0/454 dead transitions. [2024-06-21 19:21:17,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 454 transitions, 6441 flow [2024-06-21 19:21:17,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:17,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 19:21:17,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 19:21:17,718 INFO L175 Difference]: Start difference. First operand has 456 places, 437 transitions, 5439 flow. Second operand 12 states and 130 transitions. [2024-06-21 19:21:17,718 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 454 transitions, 6441 flow [2024-06-21 19:21:19,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 454 transitions, 6331 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:19,187 INFO L231 Difference]: Finished difference. Result has 460 places, 439 transitions, 5486 flow [2024-06-21 19:21:19,188 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5329, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5486, PETRI_PLACES=460, PETRI_TRANSITIONS=439} [2024-06-21 19:21:19,193 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 430 predicate places. [2024-06-21 19:21:19,193 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 439 transitions, 5486 flow [2024-06-21 19:21:19,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:19,194 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:19,194 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:19,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 19:21:19,194 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:19,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:19,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1140917093, now seen corresponding path program 10 times [2024-06-21 19:21:19,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:19,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599508046] [2024-06-21 19:21:19,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:19,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:21,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:21,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599508046] [2024-06-21 19:21:21,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599508046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:21,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:21,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:21,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328979602] [2024-06-21 19:21:21,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:21,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:21,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:21,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:21,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:21,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:21,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 439 transitions, 5486 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:21,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:21,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:21,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:22,026 INFO L124 PetriNetUnfolderBase]: 1171/2057 cut-off events. [2024-06-21 19:21:22,027 INFO L125 PetriNetUnfolderBase]: For 357346/357346 co-relation queries the response was YES. [2024-06-21 19:21:22,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16283 conditions, 2057 events. 1171/2057 cut-off events. For 357346/357346 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 12240 event pairs, 254 based on Foata normal form. 2/2057 useless extension candidates. Maximal degree in co-relation 16093. Up to 1984 conditions per place. [2024-06-21 19:21:22,055 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 424 selfloop transitions, 28 changer transitions 0/454 dead transitions. [2024-06-21 19:21:22,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 454 transitions, 6470 flow [2024-06-21 19:21:22,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:21:22,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:21:22,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 122 transitions. [2024-06-21 19:21:22,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35777126099706746 [2024-06-21 19:21:22,057 INFO L175 Difference]: Start difference. First operand has 460 places, 439 transitions, 5486 flow. Second operand 11 states and 122 transitions. [2024-06-21 19:21:22,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 454 transitions, 6470 flow [2024-06-21 19:21:23,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 454 transitions, 6356 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:23,684 INFO L231 Difference]: Finished difference. Result has 462 places, 440 transitions, 5476 flow [2024-06-21 19:21:23,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5372, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=439, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5476, PETRI_PLACES=462, PETRI_TRANSITIONS=440} [2024-06-21 19:21:23,702 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 432 predicate places. [2024-06-21 19:21:23,702 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 440 transitions, 5476 flow [2024-06-21 19:21:23,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:23,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:23,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:23,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 19:21:23,702 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:23,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:23,703 INFO L85 PathProgramCache]: Analyzing trace with hash 619038709, now seen corresponding path program 11 times [2024-06-21 19:21:23,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:23,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435938622] [2024-06-21 19:21:23,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:23,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:23,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:25,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:25,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435938622] [2024-06-21 19:21:25,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435938622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:25,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:25,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:25,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330499700] [2024-06-21 19:21:25,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:25,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:25,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:25,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:25,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:25,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:25,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 440 transitions, 5476 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:25,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:25,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:25,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:26,081 INFO L124 PetriNetUnfolderBase]: 1175/2065 cut-off events. [2024-06-21 19:21:26,082 INFO L125 PetriNetUnfolderBase]: For 361899/361899 co-relation queries the response was YES. [2024-06-21 19:21:26,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16284 conditions, 2065 events. 1175/2065 cut-off events. For 361899/361899 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 12314 event pairs, 258 based on Foata normal form. 2/2065 useless extension candidates. Maximal degree in co-relation 16093. Up to 2017 conditions per place. [2024-06-21 19:21:26,109 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 435 selfloop transitions, 16 changer transitions 0/453 dead transitions. [2024-06-21 19:21:26,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 453 transitions, 6448 flow [2024-06-21 19:21:26,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:21:26,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:21:26,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 112 transitions. [2024-06-21 19:21:26,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3284457478005865 [2024-06-21 19:21:26,110 INFO L175 Difference]: Start difference. First operand has 462 places, 440 transitions, 5476 flow. Second operand 11 states and 112 transitions. [2024-06-21 19:21:26,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 453 transitions, 6448 flow [2024-06-21 19:21:27,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 453 transitions, 6354 flow, removed 20 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:27,786 INFO L231 Difference]: Finished difference. Result has 464 places, 441 transitions, 5464 flow [2024-06-21 19:21:27,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5382, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5464, PETRI_PLACES=464, PETRI_TRANSITIONS=441} [2024-06-21 19:21:27,786 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 434 predicate places. [2024-06-21 19:21:27,787 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 441 transitions, 5464 flow [2024-06-21 19:21:27,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:27,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:27,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:27,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 19:21:27,787 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:27,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:27,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1646471625, now seen corresponding path program 12 times [2024-06-21 19:21:27,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:27,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825211021] [2024-06-21 19:21:27,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:27,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:27,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:29,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:29,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825211021] [2024-06-21 19:21:29,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825211021] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:29,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:29,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:29,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328040565] [2024-06-21 19:21:29,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:29,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:29,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:29,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:29,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:29,876 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:29,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 441 transitions, 5464 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:29,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:29,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:29,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:30,692 INFO L124 PetriNetUnfolderBase]: 1183/2081 cut-off events. [2024-06-21 19:21:30,692 INFO L125 PetriNetUnfolderBase]: For 367182/367182 co-relation queries the response was YES. [2024-06-21 19:21:30,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16349 conditions, 2081 events. 1183/2081 cut-off events. For 367182/367182 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 12455 event pairs, 264 based on Foata normal form. 2/2081 useless extension candidates. Maximal degree in co-relation 16157. Up to 2028 conditions per place. [2024-06-21 19:21:30,718 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 427 selfloop transitions, 24 changer transitions 0/453 dead transitions. [2024-06-21 19:21:30,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 453 transitions, 6438 flow [2024-06-21 19:21:30,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:21:30,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:21:30,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 109 transitions. [2024-06-21 19:21:30,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35161290322580646 [2024-06-21 19:21:30,719 INFO L175 Difference]: Start difference. First operand has 464 places, 441 transitions, 5464 flow. Second operand 10 states and 109 transitions. [2024-06-21 19:21:30,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 453 transitions, 6438 flow [2024-06-21 19:21:32,433 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 453 transitions, 6366 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:32,438 INFO L231 Difference]: Finished difference. Result has 465 places, 443 transitions, 5500 flow [2024-06-21 19:21:32,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5392, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5500, PETRI_PLACES=465, PETRI_TRANSITIONS=443} [2024-06-21 19:21:32,438 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 435 predicate places. [2024-06-21 19:21:32,438 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 443 transitions, 5500 flow [2024-06-21 19:21:32,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:32,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:32,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:32,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 19:21:32,439 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:32,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:32,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1646480925, now seen corresponding path program 13 times [2024-06-21 19:21:32,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:32,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339357002] [2024-06-21 19:21:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:32,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:32,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:34,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:34,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:34,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339357002] [2024-06-21 19:21:34,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339357002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:34,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:34,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:34,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381574170] [2024-06-21 19:21:34,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:34,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:34,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:34,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:34,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:34,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:34,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 443 transitions, 5500 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:34,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:34,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:34,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:35,036 INFO L124 PetriNetUnfolderBase]: 1187/2089 cut-off events. [2024-06-21 19:21:35,036 INFO L125 PetriNetUnfolderBase]: For 372904/372904 co-relation queries the response was YES. [2024-06-21 19:21:35,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16446 conditions, 2089 events. 1187/2089 cut-off events. For 372904/372904 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 12497 event pairs, 260 based on Foata normal form. 2/2089 useless extension candidates. Maximal degree in co-relation 16253. Up to 2026 conditions per place. [2024-06-21 19:21:35,066 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 431 selfloop transitions, 22 changer transitions 0/455 dead transitions. [2024-06-21 19:21:35,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 455 transitions, 6478 flow [2024-06-21 19:21:35,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:21:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:21:35,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 114 transitions. [2024-06-21 19:21:35,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3343108504398827 [2024-06-21 19:21:35,068 INFO L175 Difference]: Start difference. First operand has 465 places, 443 transitions, 5500 flow. Second operand 11 states and 114 transitions. [2024-06-21 19:21:35,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 455 transitions, 6478 flow [2024-06-21 19:21:36,871 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 455 transitions, 6388 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 19:21:36,876 INFO L231 Difference]: Finished difference. Result has 468 places, 444 transitions, 5510 flow [2024-06-21 19:21:36,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5410, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=443, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5510, PETRI_PLACES=468, PETRI_TRANSITIONS=444} [2024-06-21 19:21:36,877 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 438 predicate places. [2024-06-21 19:21:36,877 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 444 transitions, 5510 flow [2024-06-21 19:21:36,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:36,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:36,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:36,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 19:21:36,877 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:36,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:36,878 INFO L85 PathProgramCache]: Analyzing trace with hash 542721664, now seen corresponding path program 16 times [2024-06-21 19:21:36,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:36,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283056723] [2024-06-21 19:21:36,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:36,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:36,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:38,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:38,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:38,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283056723] [2024-06-21 19:21:38,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283056723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:38,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:38,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:38,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087332281] [2024-06-21 19:21:38,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:38,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:38,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:38,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:38,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:38,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:38,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 444 transitions, 5510 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:38,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:38,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:38,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:39,371 INFO L124 PetriNetUnfolderBase]: 1207/2133 cut-off events. [2024-06-21 19:21:39,372 INFO L125 PetriNetUnfolderBase]: For 471784/471784 co-relation queries the response was YES. [2024-06-21 19:21:39,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16639 conditions, 2133 events. 1207/2133 cut-off events. For 471784/471784 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 12812 event pairs, 266 based on Foata normal form. 12/2143 useless extension candidates. Maximal degree in co-relation 16445. Up to 2025 conditions per place. [2024-06-21 19:21:39,402 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 428 selfloop transitions, 26 changer transitions 7/463 dead transitions. [2024-06-21 19:21:39,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 463 transitions, 6553 flow [2024-06-21 19:21:39,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:21:39,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:21:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 19:21:39,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 19:21:39,404 INFO L175 Difference]: Start difference. First operand has 468 places, 444 transitions, 5510 flow. Second operand 11 states and 127 transitions. [2024-06-21 19:21:39,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 463 transitions, 6553 flow [2024-06-21 19:21:41,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 463 transitions, 6465 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:41,266 INFO L231 Difference]: Finished difference. Result has 471 places, 444 transitions, 5483 flow [2024-06-21 19:21:41,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5422, PETRI_DIFFERENCE_MINUEND_PLACES=459, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5483, PETRI_PLACES=471, PETRI_TRANSITIONS=444} [2024-06-21 19:21:41,267 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 441 predicate places. [2024-06-21 19:21:41,267 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 444 transitions, 5483 flow [2024-06-21 19:21:41,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:41,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:41,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:41,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 19:21:41,268 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:41,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:41,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1195262535, now seen corresponding path program 13 times [2024-06-21 19:21:41,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:41,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641509318] [2024-06-21 19:21:41,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:41,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:43,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:43,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:43,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641509318] [2024-06-21 19:21:43,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641509318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:43,204 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:43,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:43,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330164623] [2024-06-21 19:21:43,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:43,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:43,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:43,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:43,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:43,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:43,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 444 transitions, 5483 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:43,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:43,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:43,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:44,377 INFO L124 PetriNetUnfolderBase]: 1191/2101 cut-off events. [2024-06-21 19:21:44,377 INFO L125 PetriNetUnfolderBase]: For 376648/376648 co-relation queries the response was YES. [2024-06-21 19:21:44,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16427 conditions, 2101 events. 1191/2101 cut-off events. For 376648/376648 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 12654 event pairs, 250 based on Foata normal form. 2/2101 useless extension candidates. Maximal degree in co-relation 16231. Up to 1970 conditions per place. [2024-06-21 19:21:44,405 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 422 selfloop transitions, 40 changer transitions 0/464 dead transitions. [2024-06-21 19:21:44,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 464 transitions, 6816 flow [2024-06-21 19:21:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:44,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:44,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 19:21:44,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:21:44,406 INFO L175 Difference]: Start difference. First operand has 471 places, 444 transitions, 5483 flow. Second operand 12 states and 138 transitions. [2024-06-21 19:21:44,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 464 transitions, 6816 flow [2024-06-21 19:21:46,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 464 transitions, 6738 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-21 19:21:46,157 INFO L231 Difference]: Finished difference. Result has 475 places, 446 transitions, 5536 flow [2024-06-21 19:21:46,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5405, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5536, PETRI_PLACES=475, PETRI_TRANSITIONS=446} [2024-06-21 19:21:46,157 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 445 predicate places. [2024-06-21 19:21:46,157 INFO L495 AbstractCegarLoop]: Abstraction has has 475 places, 446 transitions, 5536 flow [2024-06-21 19:21:46,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:46,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:46,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:46,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 19:21:46,158 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:46,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:46,158 INFO L85 PathProgramCache]: Analyzing trace with hash 550086985, now seen corresponding path program 14 times [2024-06-21 19:21:46,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:46,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009059631] [2024-06-21 19:21:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:46,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:48,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:48,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:48,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009059631] [2024-06-21 19:21:48,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009059631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:48,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:48,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:48,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187496012] [2024-06-21 19:21:48,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:48,599 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:48,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:48,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:48,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:48,740 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:48,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 475 places, 446 transitions, 5536 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:48,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:48,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:48,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:49,428 INFO L124 PetriNetUnfolderBase]: 1195/2109 cut-off events. [2024-06-21 19:21:49,428 INFO L125 PetriNetUnfolderBase]: For 382812/382812 co-relation queries the response was YES. [2024-06-21 19:21:49,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16572 conditions, 2109 events. 1195/2109 cut-off events. For 382812/382812 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 12718 event pairs, 264 based on Foata normal form. 2/2109 useless extension candidates. Maximal degree in co-relation 16375. Up to 2057 conditions per place. [2024-06-21 19:21:49,460 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 436 selfloop transitions, 21 changer transitions 0/459 dead transitions. [2024-06-21 19:21:49,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 459 transitions, 6528 flow [2024-06-21 19:21:49,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:21:49,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:21:49,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 117 transitions. [2024-06-21 19:21:49,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34310850439882695 [2024-06-21 19:21:49,461 INFO L175 Difference]: Start difference. First operand has 475 places, 446 transitions, 5536 flow. Second operand 11 states and 117 transitions. [2024-06-21 19:21:49,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 459 transitions, 6528 flow [2024-06-21 19:21:51,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 475 places, 459 transitions, 6418 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-21 19:21:51,434 INFO L231 Difference]: Finished difference. Result has 476 places, 447 transitions, 5522 flow [2024-06-21 19:21:51,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5426, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5522, PETRI_PLACES=476, PETRI_TRANSITIONS=447} [2024-06-21 19:21:51,434 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 446 predicate places. [2024-06-21 19:21:51,434 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 447 transitions, 5522 flow [2024-06-21 19:21:51,435 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:51,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:51,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:51,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 19:21:51,435 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:51,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:51,445 INFO L85 PathProgramCache]: Analyzing trace with hash 550079049, now seen corresponding path program 14 times [2024-06-21 19:21:51,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:51,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759271958] [2024-06-21 19:21:51,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:51,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:51,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:54,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:54,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:54,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759271958] [2024-06-21 19:21:54,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759271958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:54,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:54,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:21:54,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755019456] [2024-06-21 19:21:54,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:54,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:21:54,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:21:54,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:21:54,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:54,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 447 transitions, 5522 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) [2024-06-21 19:21:54,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:54,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:54,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:21:55,300 INFO L124 PetriNetUnfolderBase]: 1191/2103 cut-off events. [2024-06-21 19:21:55,301 INFO L125 PetriNetUnfolderBase]: For 367770/367770 co-relation queries the response was YES. [2024-06-21 19:21:55,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16200 conditions, 2103 events. 1191/2103 cut-off events. For 367770/367770 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 12675 event pairs, 261 based on Foata normal form. 2/2103 useless extension candidates. Maximal degree in co-relation 16002. Up to 2041 conditions per place. [2024-06-21 19:21:55,332 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 435 selfloop transitions, 24 changer transitions 0/461 dead transitions. [2024-06-21 19:21:55,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 461 transitions, 6478 flow [2024-06-21 19:21:55,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:21:55,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:21:55,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 128 transitions. [2024-06-21 19:21:55,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34408602150537637 [2024-06-21 19:21:55,333 INFO L175 Difference]: Start difference. First operand has 476 places, 447 transitions, 5522 flow. Second operand 12 states and 128 transitions. [2024-06-21 19:21:55,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 461 transitions, 6478 flow [2024-06-21 19:21:57,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 461 transitions, 6376 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-21 19:21:57,330 INFO L231 Difference]: Finished difference. Result has 479 places, 447 transitions, 5473 flow [2024-06-21 19:21:57,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5420, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=423, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5473, PETRI_PLACES=479, PETRI_TRANSITIONS=447} [2024-06-21 19:21:57,330 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 449 predicate places. [2024-06-21 19:21:57,330 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 447 transitions, 5473 flow [2024-06-21 19:21:57,331 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) [2024-06-21 19:21:57,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:21:57,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:21:57,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 19:21:57,331 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:21:57,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:21:57,336 INFO L85 PathProgramCache]: Analyzing trace with hash 550355755, now seen corresponding path program 15 times [2024-06-21 19:21:57,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:21:57,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079657182] [2024-06-21 19:21:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:21:57,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:21:57,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:21:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:21:59,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:21:59,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079657182] [2024-06-21 19:21:59,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079657182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:21:59,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:21:59,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:21:59,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578507612] [2024-06-21 19:21:59,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:21:59,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:21:59,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:21:59,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:21:59,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:21:59,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:21:59,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 447 transitions, 5473 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:21:59,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:21:59,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:21:59,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:00,052 INFO L124 PetriNetUnfolderBase]: 1195/2111 cut-off events. [2024-06-21 19:22:00,052 INFO L125 PetriNetUnfolderBase]: For 372929/372929 co-relation queries the response was YES. [2024-06-21 19:22:00,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16253 conditions, 2111 events. 1195/2111 cut-off events. For 372929/372929 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 12755 event pairs, 263 based on Foata normal form. 2/2111 useless extension candidates. Maximal degree in co-relation 16054. Up to 2059 conditions per place. [2024-06-21 19:22:00,082 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 438 selfloop transitions, 20 changer transitions 0/460 dead transitions. [2024-06-21 19:22:00,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 460 transitions, 6467 flow [2024-06-21 19:22:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:00,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 116 transitions. [2024-06-21 19:22:00,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34017595307917886 [2024-06-21 19:22:00,083 INFO L175 Difference]: Start difference. First operand has 479 places, 447 transitions, 5473 flow. Second operand 11 states and 116 transitions. [2024-06-21 19:22:00,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 460 transitions, 6467 flow [2024-06-21 19:22:01,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 460 transitions, 6412 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-21 19:22:01,837 INFO L231 Difference]: Finished difference. Result has 480 places, 448 transitions, 5514 flow [2024-06-21 19:22:01,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5418, PETRI_DIFFERENCE_MINUEND_PLACES=469, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5514, PETRI_PLACES=480, PETRI_TRANSITIONS=448} [2024-06-21 19:22:01,838 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 450 predicate places. [2024-06-21 19:22:01,838 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 448 transitions, 5514 flow [2024-06-21 19:22:01,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:01,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:01,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:01,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 19:22:01,838 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:01,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:01,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1141126839, now seen corresponding path program 15 times [2024-06-21 19:22:01,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:01,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341198789] [2024-06-21 19:22:01,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:01,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:01,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:03,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:03,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:03,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341198789] [2024-06-21 19:22:03,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341198789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:03,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:03,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:03,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878444606] [2024-06-21 19:22:03,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:03,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:03,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:03,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:03,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:04,048 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:04,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 448 transitions, 5514 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:04,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:04,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:04,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:05,060 INFO L124 PetriNetUnfolderBase]: 1191/2105 cut-off events. [2024-06-21 19:22:05,061 INFO L125 PetriNetUnfolderBase]: For 357646/357646 co-relation queries the response was YES. [2024-06-21 19:22:05,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15954 conditions, 2105 events. 1191/2105 cut-off events. For 357646/357646 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 12716 event pairs, 251 based on Foata normal form. 2/2105 useless extension candidates. Maximal degree in co-relation 15754. Up to 1977 conditions per place. [2024-06-21 19:22:05,093 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 424 selfloop transitions, 40 changer transitions 0/466 dead transitions. [2024-06-21 19:22:05,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 491 places, 466 transitions, 6813 flow [2024-06-21 19:22:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:05,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:05,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 137 transitions. [2024-06-21 19:22:05,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3682795698924731 [2024-06-21 19:22:05,094 INFO L175 Difference]: Start difference. First operand has 480 places, 448 transitions, 5514 flow. Second operand 12 states and 137 transitions. [2024-06-21 19:22:05,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 491 places, 466 transitions, 6813 flow [2024-06-21 19:22:06,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 466 transitions, 6727 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-21 19:22:06,955 INFO L231 Difference]: Finished difference. Result has 483 places, 448 transitions, 5513 flow [2024-06-21 19:22:06,955 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5428, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5513, PETRI_PLACES=483, PETRI_TRANSITIONS=448} [2024-06-21 19:22:06,955 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 453 predicate places. [2024-06-21 19:22:06,956 INFO L495 AbstractCegarLoop]: Abstraction has has 483 places, 448 transitions, 5513 flow [2024-06-21 19:22:06,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:06,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:06,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:06,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 19:22:06,956 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:06,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:06,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1141132574, now seen corresponding path program 17 times [2024-06-21 19:22:06,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:06,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243801314] [2024-06-21 19:22:06,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:06,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:09,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:09,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:09,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243801314] [2024-06-21 19:22:09,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243801314] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:09,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:09,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:09,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463560670] [2024-06-21 19:22:09,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:09,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:09,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:09,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:09,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:09,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:09,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 483 places, 448 transitions, 5513 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:09,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:09,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:09,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:10,051 INFO L124 PetriNetUnfolderBase]: 1195/2113 cut-off events. [2024-06-21 19:22:10,052 INFO L125 PetriNetUnfolderBase]: For 362010/362010 co-relation queries the response was YES. [2024-06-21 19:22:10,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16026 conditions, 2113 events. 1195/2113 cut-off events. For 362010/362010 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 12792 event pairs, 266 based on Foata normal form. 2/2113 useless extension candidates. Maximal degree in co-relation 15825. Up to 2063 conditions per place. [2024-06-21 19:22:10,082 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 435 selfloop transitions, 25 changer transitions 0/462 dead transitions. [2024-06-21 19:22:10,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 462 transitions, 6543 flow [2024-06-21 19:22:10,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:10,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:10,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 19:22:10,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489736070381232 [2024-06-21 19:22:10,083 INFO L175 Difference]: Start difference. First operand has 483 places, 448 transitions, 5513 flow. Second operand 11 states and 119 transitions. [2024-06-21 19:22:10,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 462 transitions, 6543 flow [2024-06-21 19:22:11,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 482 places, 462 transitions, 6353 flow, removed 15 selfloop flow, removed 11 redundant places. [2024-06-21 19:22:11,820 INFO L231 Difference]: Finished difference. Result has 484 places, 451 transitions, 5470 flow [2024-06-21 19:22:11,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5325, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5470, PETRI_PLACES=484, PETRI_TRANSITIONS=451} [2024-06-21 19:22:11,820 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 454 predicate places. [2024-06-21 19:22:11,820 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 451 transitions, 5470 flow [2024-06-21 19:22:11,820 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:11,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:11,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:11,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 19:22:11,821 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:11,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:11,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1335071984, now seen corresponding path program 18 times [2024-06-21 19:22:11,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:11,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877855888] [2024-06-21 19:22:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:11,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:11,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:14,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:14,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877855888] [2024-06-21 19:22:14,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877855888] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:14,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:14,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:14,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448745483] [2024-06-21 19:22:14,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:14,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:14,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:14,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:14,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:14,738 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:14,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 451 transitions, 5470 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:14,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:14,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:14,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:15,500 INFO L124 PetriNetUnfolderBase]: 1199/2121 cut-off events. [2024-06-21 19:22:15,500 INFO L125 PetriNetUnfolderBase]: For 366327/366327 co-relation queries the response was YES. [2024-06-21 19:22:15,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16050 conditions, 2121 events. 1199/2121 cut-off events. For 366327/366327 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 12838 event pairs, 254 based on Foata normal form. 2/2121 useless extension candidates. Maximal degree in co-relation 15847. Up to 1983 conditions per place. [2024-06-21 19:22:15,533 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 418 selfloop transitions, 49 changer transitions 0/469 dead transitions. [2024-06-21 19:22:15,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 469 transitions, 6578 flow [2024-06-21 19:22:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:15,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:15,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 125 transitions. [2024-06-21 19:22:15,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36656891495601174 [2024-06-21 19:22:15,534 INFO L175 Difference]: Start difference. First operand has 484 places, 451 transitions, 5470 flow. Second operand 11 states and 125 transitions. [2024-06-21 19:22:15,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 469 transitions, 6578 flow [2024-06-21 19:22:17,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 469 transitions, 6471 flow, removed 29 selfloop flow, removed 9 redundant places. [2024-06-21 19:22:17,374 INFO L231 Difference]: Finished difference. Result has 487 places, 456 transitions, 5619 flow [2024-06-21 19:22:17,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5363, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5619, PETRI_PLACES=487, PETRI_TRANSITIONS=456} [2024-06-21 19:22:17,374 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 457 predicate places. [2024-06-21 19:22:17,374 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 456 transitions, 5619 flow [2024-06-21 19:22:17,375 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:17,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:17,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:17,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 19:22:17,375 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:17,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:17,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1133507783, now seen corresponding path program 16 times [2024-06-21 19:22:17,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:17,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602796766] [2024-06-21 19:22:17,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:17,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:17,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:19,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:19,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602796766] [2024-06-21 19:22:19,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602796766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:19,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:19,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:19,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844250800] [2024-06-21 19:22:19,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:19,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:19,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:19,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:19,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 456 transitions, 5619 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:19,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:19,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:19,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:20,750 INFO L124 PetriNetUnfolderBase]: 1203/2129 cut-off events. [2024-06-21 19:22:20,750 INFO L125 PetriNetUnfolderBase]: For 372110/372110 co-relation queries the response was YES. [2024-06-21 19:22:20,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16201 conditions, 2129 events. 1203/2129 cut-off events. For 372110/372110 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 12910 event pairs, 264 based on Foata normal form. 2/2129 useless extension candidates. Maximal degree in co-relation 15996. Up to 2065 conditions per place. [2024-06-21 19:22:20,776 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 443 selfloop transitions, 25 changer transitions 0/470 dead transitions. [2024-06-21 19:22:20,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 497 places, 470 transitions, 6641 flow [2024-06-21 19:22:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 119 transitions. [2024-06-21 19:22:20,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3489736070381232 [2024-06-21 19:22:20,777 INFO L175 Difference]: Start difference. First operand has 487 places, 456 transitions, 5619 flow. Second operand 11 states and 119 transitions. [2024-06-21 19:22:20,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 497 places, 470 transitions, 6641 flow [2024-06-21 19:22:22,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 470 transitions, 6501 flow, removed 52 selfloop flow, removed 7 redundant places. [2024-06-21 19:22:22,799 INFO L231 Difference]: Finished difference. Result has 491 places, 457 transitions, 5587 flow [2024-06-21 19:22:22,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5479, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=456, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5587, PETRI_PLACES=491, PETRI_TRANSITIONS=457} [2024-06-21 19:22:22,800 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 461 predicate places. [2024-06-21 19:22:22,800 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 457 transitions, 5587 flow [2024-06-21 19:22:22,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:22,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:22,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:22,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 19:22:22,801 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:22,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:22,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1335066249, now seen corresponding path program 16 times [2024-06-21 19:22:22,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:22,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105831929] [2024-06-21 19:22:22,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:22,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:25,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:25,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105831929] [2024-06-21 19:22:25,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105831929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:25,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:25,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:22:25,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717114105] [2024-06-21 19:22:25,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:25,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:22:25,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:25,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:22:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:22:25,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:25,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 457 transitions, 5587 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) [2024-06-21 19:22:25,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:25,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:25,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:26,311 INFO L124 PetriNetUnfolderBase]: 1199/2123 cut-off events. [2024-06-21 19:22:26,312 INFO L125 PetriNetUnfolderBase]: For 354247/354247 co-relation queries the response was YES. [2024-06-21 19:22:26,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15811 conditions, 2123 events. 1199/2123 cut-off events. For 354247/354247 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 12900 event pairs, 248 based on Foata normal form. 2/2123 useless extension candidates. Maximal degree in co-relation 15606. Up to 1798 conditions per place. [2024-06-21 19:22:26,342 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 394 selfloop transitions, 79 changer transitions 0/475 dead transitions. [2024-06-21 19:22:26,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 475 transitions, 7171 flow [2024-06-21 19:22:26,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:26,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:26,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 143 transitions. [2024-06-21 19:22:26,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3844086021505376 [2024-06-21 19:22:26,343 INFO L175 Difference]: Start difference. First operand has 491 places, 457 transitions, 5587 flow. Second operand 12 states and 143 transitions. [2024-06-21 19:22:26,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 475 transitions, 7171 flow [2024-06-21 19:22:28,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 475 transitions, 7055 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-21 19:22:28,239 INFO L231 Difference]: Finished difference. Result has 494 places, 457 transitions, 5634 flow [2024-06-21 19:22:28,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5471, PETRI_DIFFERENCE_MINUEND_PLACES=482, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5634, PETRI_PLACES=494, PETRI_TRANSITIONS=457} [2024-06-21 19:22:28,240 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 464 predicate places. [2024-06-21 19:22:28,240 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 457 transitions, 5634 flow [2024-06-21 19:22:28,240 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) [2024-06-21 19:22:28,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:28,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:28,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 19:22:28,241 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:28,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:28,241 INFO L85 PathProgramCache]: Analyzing trace with hash -1340582234, now seen corresponding path program 19 times [2024-06-21 19:22:28,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:28,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819682845] [2024-06-21 19:22:28,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:28,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:28,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:30,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:30,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:30,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819682845] [2024-06-21 19:22:30,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819682845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:30,206 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:30,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:30,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778062510] [2024-06-21 19:22:30,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:30,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:30,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:30,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:30,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:30,385 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:30,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 457 transitions, 5634 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:30,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:30,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:30,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:31,207 INFO L124 PetriNetUnfolderBase]: 1214/2152 cut-off events. [2024-06-21 19:22:31,207 INFO L125 PetriNetUnfolderBase]: For 380954/380954 co-relation queries the response was YES. [2024-06-21 19:22:31,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16386 conditions, 2152 events. 1214/2152 cut-off events. For 380954/380954 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 13094 event pairs, 272 based on Foata normal form. 2/2152 useless extension candidates. Maximal degree in co-relation 16180. Up to 2010 conditions per place. [2024-06-21 19:22:31,239 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 420 selfloop transitions, 52 changer transitions 1/475 dead transitions. [2024-06-21 19:22:31,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 475 transitions, 6984 flow [2024-06-21 19:22:31,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:31,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:31,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 19:22:31,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 19:22:31,240 INFO L175 Difference]: Start difference. First operand has 494 places, 457 transitions, 5634 flow. Second operand 11 states and 129 transitions. [2024-06-21 19:22:31,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 475 transitions, 6984 flow [2024-06-21 19:22:33,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 475 transitions, 6759 flow, removed 6 selfloop flow, removed 13 redundant places. [2024-06-21 19:22:33,126 INFO L231 Difference]: Finished difference. Result has 493 places, 460 transitions, 5603 flow [2024-06-21 19:22:33,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5409, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5603, PETRI_PLACES=493, PETRI_TRANSITIONS=460} [2024-06-21 19:22:33,126 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 463 predicate places. [2024-06-21 19:22:33,126 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 460 transitions, 5603 flow [2024-06-21 19:22:33,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:33,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:33,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:33,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 19:22:33,127 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:33,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:33,127 INFO L85 PathProgramCache]: Analyzing trace with hash 1872291930, now seen corresponding path program 20 times [2024-06-21 19:22:33,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:33,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076383164] [2024-06-21 19:22:33,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:33,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:33,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:34,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:34,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076383164] [2024-06-21 19:22:34,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076383164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:34,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:34,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:34,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097623399] [2024-06-21 19:22:34,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:34,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:34,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:34,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:34,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:34,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:34,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 460 transitions, 5603 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:34,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:34,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:34,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:35,826 INFO L124 PetriNetUnfolderBase]: 1221/2165 cut-off events. [2024-06-21 19:22:35,826 INFO L125 PetriNetUnfolderBase]: For 386125/386125 co-relation queries the response was YES. [2024-06-21 19:22:35,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16420 conditions, 2165 events. 1221/2165 cut-off events. For 386125/386125 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 13210 event pairs, 274 based on Foata normal form. 2/2165 useless extension candidates. Maximal degree in co-relation 16213. Up to 2057 conditions per place. [2024-06-21 19:22:35,859 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 423 selfloop transitions, 50 changer transitions 1/476 dead transitions. [2024-06-21 19:22:35,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 476 transitions, 6655 flow [2024-06-21 19:22:35,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:35,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:35,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 19:22:35,861 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 19:22:35,861 INFO L175 Difference]: Start difference. First operand has 493 places, 460 transitions, 5603 flow. Second operand 11 states and 127 transitions. [2024-06-21 19:22:35,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 476 transitions, 6655 flow [2024-06-21 19:22:37,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 476 transitions, 6501 flow, removed 33 selfloop flow, removed 7 redundant places. [2024-06-21 19:22:37,941 INFO L231 Difference]: Finished difference. Result has 497 places, 463 transitions, 5627 flow [2024-06-21 19:22:37,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5467, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=460, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5627, PETRI_PLACES=497, PETRI_TRANSITIONS=463} [2024-06-21 19:22:37,942 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 467 predicate places. [2024-06-21 19:22:37,942 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 463 transitions, 5627 flow [2024-06-21 19:22:37,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:37,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:37,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:37,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 19:22:37,943 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:37,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:37,943 INFO L85 PathProgramCache]: Analyzing trace with hash 2079371961, now seen corresponding path program 17 times [2024-06-21 19:22:37,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:37,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333436304] [2024-06-21 19:22:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:37,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:39,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:39,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:39,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333436304] [2024-06-21 19:22:39,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333436304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:39,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:39,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:22:39,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109142033] [2024-06-21 19:22:39,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:39,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:22:39,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:39,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:22:39,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:22:39,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:39,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 463 transitions, 5627 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:39,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:39,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:39,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:40,441 INFO L124 PetriNetUnfolderBase]: 1225/2173 cut-off events. [2024-06-21 19:22:40,442 INFO L125 PetriNetUnfolderBase]: For 391434/391434 co-relation queries the response was YES. [2024-06-21 19:22:40,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16503 conditions, 2173 events. 1225/2173 cut-off events. For 391434/391434 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 13292 event pairs, 272 based on Foata normal form. 2/2173 useless extension candidates. Maximal degree in co-relation 16295. Up to 2109 conditions per place. [2024-06-21 19:22:40,475 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 451 selfloop transitions, 24 changer transitions 0/477 dead transitions. [2024-06-21 19:22:40,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 477 transitions, 6663 flow [2024-06-21 19:22:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:40,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 118 transitions. [2024-06-21 19:22:40,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3460410557184751 [2024-06-21 19:22:40,477 INFO L175 Difference]: Start difference. First operand has 497 places, 463 transitions, 5627 flow. Second operand 11 states and 118 transitions. [2024-06-21 19:22:40,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 477 transitions, 6663 flow [2024-06-21 19:22:42,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 499 places, 477 transitions, 6551 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 19:22:42,566 INFO L231 Difference]: Finished difference. Result has 500 places, 464 transitions, 5623 flow [2024-06-21 19:22:42,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5515, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=463, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5623, PETRI_PLACES=500, PETRI_TRANSITIONS=464} [2024-06-21 19:22:42,567 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 470 predicate places. [2024-06-21 19:22:42,567 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 464 transitions, 5623 flow [2024-06-21 19:22:42,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:42,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:42,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:42,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 19:22:42,567 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:42,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:42,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1340434364, now seen corresponding path program 21 times [2024-06-21 19:22:42,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:42,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387185896] [2024-06-21 19:22:42,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:42,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:45,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:45,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387185896] [2024-06-21 19:22:45,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387185896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:45,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:45,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:22:45,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054993576] [2024-06-21 19:22:45,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:45,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:22:45,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:45,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:22:45,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:22:45,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:45,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 464 transitions, 5623 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:45,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:45,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:45,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:46,010 INFO L124 PetriNetUnfolderBase]: 1222/2168 cut-off events. [2024-06-21 19:22:46,010 INFO L125 PetriNetUnfolderBase]: For 373667/373667 co-relation queries the response was YES. [2024-06-21 19:22:46,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16134 conditions, 2168 events. 1222/2168 cut-off events. For 373667/373667 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 13269 event pairs, 263 based on Foata normal form. 2/2168 useless extension candidates. Maximal degree in co-relation 15925. Up to 2030 conditions per place. [2024-06-21 19:22:46,043 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 420 selfloop transitions, 56 changer transitions 0/478 dead transitions. [2024-06-21 19:22:46,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 478 transitions, 6611 flow [2024-06-21 19:22:46,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:22:46,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:22:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 19:22:46,050 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 19:22:46,050 INFO L175 Difference]: Start difference. First operand has 500 places, 464 transitions, 5623 flow. Second operand 11 states and 126 transitions. [2024-06-21 19:22:46,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 478 transitions, 6611 flow [2024-06-21 19:22:48,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 478 transitions, 6503 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-21 19:22:48,176 INFO L231 Difference]: Finished difference. Result has 502 places, 464 transitions, 5631 flow [2024-06-21 19:22:48,176 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5515, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5631, PETRI_PLACES=502, PETRI_TRANSITIONS=464} [2024-06-21 19:22:48,177 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 472 predicate places. [2024-06-21 19:22:48,177 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 464 transitions, 5631 flow [2024-06-21 19:22:48,177 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:48,177 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:48,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:48,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 19:22:48,177 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:48,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:48,178 INFO L85 PathProgramCache]: Analyzing trace with hash 585605449, now seen corresponding path program 17 times [2024-06-21 19:22:48,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:48,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485106719] [2024-06-21 19:22:48,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:48,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:50,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:50,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485106719] [2024-06-21 19:22:50,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485106719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:50,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:50,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:22:50,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433044108] [2024-06-21 19:22:50,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:50,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:22:50,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:50,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:22:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:22:50,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:50,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 464 transitions, 5631 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) [2024-06-21 19:22:50,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:50,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:50,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:51,745 INFO L124 PetriNetUnfolderBase]: 1218/2162 cut-off events. [2024-06-21 19:22:51,746 INFO L125 PetriNetUnfolderBase]: For 353814/353814 co-relation queries the response was YES. [2024-06-21 19:22:51,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15783 conditions, 2162 events. 1218/2162 cut-off events. For 353814/353814 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 13216 event pairs, 247 based on Foata normal form. 2/2162 useless extension candidates. Maximal degree in co-relation 15573. Up to 1837 conditions per place. [2024-06-21 19:22:51,780 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 388 selfloop transitions, 90 changer transitions 0/480 dead transitions. [2024-06-21 19:22:51,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 480 transitions, 6935 flow [2024-06-21 19:22:51,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:51,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:51,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 19:22:51,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:22:51,781 INFO L175 Difference]: Start difference. First operand has 502 places, 464 transitions, 5631 flow. Second operand 12 states and 138 transitions. [2024-06-21 19:22:51,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 480 transitions, 6935 flow [2024-06-21 19:22:53,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 480 transitions, 6816 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-21 19:22:53,817 INFO L231 Difference]: Finished difference. Result has 506 places, 464 transitions, 5697 flow [2024-06-21 19:22:53,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5512, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5697, PETRI_PLACES=506, PETRI_TRANSITIONS=464} [2024-06-21 19:22:53,818 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 476 predicate places. [2024-06-21 19:22:53,818 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 464 transitions, 5697 flow [2024-06-21 19:22:53,818 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) [2024-06-21 19:22:53,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:53,818 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:53,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 19:22:53,819 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:53,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:53,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1188112695, now seen corresponding path program 18 times [2024-06-21 19:22:53,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:53,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104258322] [2024-06-21 19:22:53,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:53,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:53,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:55,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:55,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104258322] [2024-06-21 19:22:55,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104258322] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:55,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:55,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:22:55,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430834809] [2024-06-21 19:22:55,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:55,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:22:55,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:55,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:22:55,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:22:56,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:22:56,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 464 transitions, 5697 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) [2024-06-21 19:22:56,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:56,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:22:56,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:22:57,104 INFO L124 PetriNetUnfolderBase]: 1214/2156 cut-off events. [2024-06-21 19:22:57,105 INFO L125 PetriNetUnfolderBase]: For 335518/335518 co-relation queries the response was YES. [2024-06-21 19:22:57,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15553 conditions, 2156 events. 1214/2156 cut-off events. For 335518/335518 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 13185 event pairs, 267 based on Foata normal form. 2/2156 useless extension candidates. Maximal degree in co-relation 15342. Up to 2082 conditions per place. [2024-06-21 19:22:57,137 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 449 selfloop transitions, 28 changer transitions 0/479 dead transitions. [2024-06-21 19:22:57,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 479 transitions, 6693 flow [2024-06-21 19:22:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:22:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:22:57,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 130 transitions. [2024-06-21 19:22:57,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34946236559139787 [2024-06-21 19:22:57,139 INFO L175 Difference]: Start difference. First operand has 506 places, 464 transitions, 5697 flow. Second operand 12 states and 130 transitions. [2024-06-21 19:22:57,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 479 transitions, 6693 flow [2024-06-21 19:22:58,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 479 transitions, 6441 flow, removed 13 selfloop flow, removed 12 redundant places. [2024-06-21 19:22:58,990 INFO L231 Difference]: Finished difference. Result has 506 places, 464 transitions, 5506 flow [2024-06-21 19:22:58,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5445, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5506, PETRI_PLACES=506, PETRI_TRANSITIONS=464} [2024-06-21 19:22:58,990 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 476 predicate places. [2024-06-21 19:22:58,991 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 464 transitions, 5506 flow [2024-06-21 19:22:58,991 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) [2024-06-21 19:22:58,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:22:58,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:22:58,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 19:22:58,991 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:22:58,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:22:58,991 INFO L85 PathProgramCache]: Analyzing trace with hash -1205898018, now seen corresponding path program 22 times [2024-06-21 19:22:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:22:58,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191239722] [2024-06-21 19:22:58,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:22:58,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:22:58,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:22:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:22:59,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:22:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191239722] [2024-06-21 19:22:59,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191239722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:22:59,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:22:59,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 19:22:59,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100410235] [2024-06-21 19:22:59,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:22:59,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 19:22:59,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:22:59,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 19:22:59,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-21 19:22:59,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 31 [2024-06-21 19:22:59,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 464 transitions, 5506 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:22:59,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:22:59,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 31 [2024-06-21 19:22:59,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:00,733 INFO L124 PetriNetUnfolderBase]: 1124/2075 cut-off events. [2024-06-21 19:23:00,734 INFO L125 PetriNetUnfolderBase]: For 371180/371183 co-relation queries the response was YES. [2024-06-21 19:23:00,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15056 conditions, 2075 events. 1124/2075 cut-off events. For 371180/371183 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 13249 event pairs, 151 based on Foata normal form. 5/2077 useless extension candidates. Maximal degree in co-relation 14845. Up to 1313 conditions per place. [2024-06-21 19:23:00,766 INFO L140 encePairwiseOnDemand]: 21/31 looper letters, 265 selfloop transitions, 57 changer transitions 0/494 dead transitions. [2024-06-21 19:23:00,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 494 transitions, 6664 flow [2024-06-21 19:23:00,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:23:00,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:23:00,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 181 transitions. [2024-06-21 19:23:00,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41705069124423966 [2024-06-21 19:23:00,767 INFO L175 Difference]: Start difference. First operand has 506 places, 464 transitions, 5506 flow. Second operand 14 states and 181 transitions. [2024-06-21 19:23:00,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 494 transitions, 6664 flow [2024-06-21 19:23:02,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 494 transitions, 6580 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 19:23:02,694 INFO L231 Difference]: Finished difference. Result has 508 places, 466 transitions, 5614 flow [2024-06-21 19:23:02,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5422, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5614, PETRI_PLACES=508, PETRI_TRANSITIONS=466} [2024-06-21 19:23:02,694 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 478 predicate places. [2024-06-21 19:23:02,695 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 466 transitions, 5614 flow [2024-06-21 19:23:02,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:02,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:02,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:02,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 19:23:02,695 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:02,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:02,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1295667293, now seen corresponding path program 19 times [2024-06-21 19:23:02,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:02,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617995793] [2024-06-21 19:23:02,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:02,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:02,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:04,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:04,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617995793] [2024-06-21 19:23:04,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617995793] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:04,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:04,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:04,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723840281] [2024-06-21 19:23:04,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:04,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:04,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:04,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:04,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:05,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:05,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 466 transitions, 5614 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:05,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:05,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:05,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:06,272 INFO L124 PetriNetUnfolderBase]: 1221/2171 cut-off events. [2024-06-21 19:23:06,272 INFO L125 PetriNetUnfolderBase]: For 344632/344632 co-relation queries the response was YES. [2024-06-21 19:23:06,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15597 conditions, 2171 events. 1221/2171 cut-off events. For 344632/344632 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 13302 event pairs, 192 based on Foata normal form. 2/2171 useless extension candidates. Maximal degree in co-relation 15385. Up to 1920 conditions per place. [2024-06-21 19:23:06,305 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 425 selfloop transitions, 65 changer transitions 0/492 dead transitions. [2024-06-21 19:23:06,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 520 places, 492 transitions, 7044 flow [2024-06-21 19:23:06,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:23:06,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:23:06,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 154 transitions. [2024-06-21 19:23:06,306 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38213399503722084 [2024-06-21 19:23:06,306 INFO L175 Difference]: Start difference. First operand has 508 places, 466 transitions, 5614 flow. Second operand 13 states and 154 transitions. [2024-06-21 19:23:06,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 520 places, 492 transitions, 7044 flow [2024-06-21 19:23:08,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 492 transitions, 6915 flow, removed 32 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:08,112 INFO L231 Difference]: Finished difference. Result has 510 places, 466 transitions, 5622 flow [2024-06-21 19:23:08,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5487, PETRI_DIFFERENCE_MINUEND_PLACES=497, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5622, PETRI_PLACES=510, PETRI_TRANSITIONS=466} [2024-06-21 19:23:08,113 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 480 predicate places. [2024-06-21 19:23:08,113 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 466 transitions, 5622 flow [2024-06-21 19:23:08,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:08,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:08,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:08,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 19:23:08,113 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:08,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:08,114 INFO L85 PathProgramCache]: Analyzing trace with hash -995807398, now seen corresponding path program 23 times [2024-06-21 19:23:08,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:08,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733670984] [2024-06-21 19:23:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:08,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:08,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:10,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:10,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:10,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733670984] [2024-06-21 19:23:10,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733670984] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:10,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:10,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:23:10,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137357308] [2024-06-21 19:23:10,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:10,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:23:10,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:10,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:23:10,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:23:10,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:10,921 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 466 transitions, 5622 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) [2024-06-21 19:23:10,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:10,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:10,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:12,519 INFO L124 PetriNetUnfolderBase]: 1236/2199 cut-off events. [2024-06-21 19:23:12,520 INFO L125 PetriNetUnfolderBase]: For 368633/368633 co-relation queries the response was YES. [2024-06-21 19:23:12,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16143 conditions, 2199 events. 1236/2199 cut-off events. For 368633/368633 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 13544 event pairs, 205 based on Foata normal form. 2/2199 useless extension candidates. Maximal degree in co-relation 15930. Up to 2053 conditions per place. [2024-06-21 19:23:12,547 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 456 selfloop transitions, 39 changer transitions 0/497 dead transitions. [2024-06-21 19:23:12,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 523 places, 497 transitions, 7107 flow [2024-06-21 19:23:12,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:23:12,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:23:12,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 159 transitions. [2024-06-21 19:23:12,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3663594470046083 [2024-06-21 19:23:12,548 INFO L175 Difference]: Start difference. First operand has 510 places, 466 transitions, 5622 flow. Second operand 14 states and 159 transitions. [2024-06-21 19:23:12,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 523 places, 497 transitions, 7107 flow [2024-06-21 19:23:14,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 497 transitions, 6970 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-06-21 19:23:14,486 INFO L231 Difference]: Finished difference. Result has 514 places, 472 transitions, 5707 flow [2024-06-21 19:23:14,487 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5489, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5707, PETRI_PLACES=514, PETRI_TRANSITIONS=472} [2024-06-21 19:23:14,487 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 484 predicate places. [2024-06-21 19:23:14,487 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 472 transitions, 5707 flow [2024-06-21 19:23:14,487 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) [2024-06-21 19:23:14,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:14,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:14,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 19:23:14,488 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:14,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:14,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2874043, now seen corresponding path program 20 times [2024-06-21 19:23:14,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:14,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548018339] [2024-06-21 19:23:14,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:14,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:14,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:17,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:17,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548018339] [2024-06-21 19:23:17,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548018339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:17,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:17,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:23:17,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717060508] [2024-06-21 19:23:17,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:17,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:23:17,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:17,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:23:17,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:23:18,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:18,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 472 transitions, 5707 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) [2024-06-21 19:23:18,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:18,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:18,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:19,436 INFO L124 PetriNetUnfolderBase]: 1232/2193 cut-off events. [2024-06-21 19:23:19,436 INFO L125 PetriNetUnfolderBase]: For 349370/349370 co-relation queries the response was YES. [2024-06-21 19:23:19,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15812 conditions, 2193 events. 1232/2193 cut-off events. For 349370/349370 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 13527 event pairs, 206 based on Foata normal form. 2/2193 useless extension candidates. Maximal degree in co-relation 15596. Up to 2066 conditions per place. [2024-06-21 19:23:19,471 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 444 selfloop transitions, 45 changer transitions 0/491 dead transitions. [2024-06-21 19:23:19,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 525 places, 491 transitions, 6737 flow [2024-06-21 19:23:19,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:23:19,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:23:19,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 141 transitions. [2024-06-21 19:23:19,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3790322580645161 [2024-06-21 19:23:19,473 INFO L175 Difference]: Start difference. First operand has 514 places, 472 transitions, 5707 flow. Second operand 12 states and 141 transitions. [2024-06-21 19:23:19,473 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 525 places, 491 transitions, 6737 flow [2024-06-21 19:23:21,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 491 transitions, 6628 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 19:23:21,434 INFO L231 Difference]: Finished difference. Result has 519 places, 472 transitions, 5693 flow [2024-06-21 19:23:21,434 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5598, PETRI_DIFFERENCE_MINUEND_PLACES=507, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=427, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5693, PETRI_PLACES=519, PETRI_TRANSITIONS=472} [2024-06-21 19:23:21,434 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 489 predicate places. [2024-06-21 19:23:21,434 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 472 transitions, 5693 flow [2024-06-21 19:23:21,434 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) [2024-06-21 19:23:21,435 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:21,435 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:21,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 19:23:21,435 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:21,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:21,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1600026748, now seen corresponding path program 24 times [2024-06-21 19:23:21,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:21,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266004101] [2024-06-21 19:23:21,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:21,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:23,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:23,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:23,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266004101] [2024-06-21 19:23:23,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266004101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:23,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:23,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:23,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139821001] [2024-06-21 19:23:23,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:23,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:23,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:23,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:23,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:23,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:23,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 472 transitions, 5693 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:23,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:23,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:23,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:24,979 INFO L124 PetriNetUnfolderBase]: 1239/2206 cut-off events. [2024-06-21 19:23:24,979 INFO L125 PetriNetUnfolderBase]: For 352991/352991 co-relation queries the response was YES. [2024-06-21 19:23:25,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15867 conditions, 2206 events. 1239/2206 cut-off events. For 352991/352991 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 13585 event pairs, 215 based on Foata normal form. 2/2206 useless extension candidates. Maximal degree in co-relation 15649. Up to 2092 conditions per place. [2024-06-21 19:23:25,016 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 450 selfloop transitions, 44 changer transitions 0/496 dead transitions. [2024-06-21 19:23:25,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 496 transitions, 6783 flow [2024-06-21 19:23:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:23:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:23:25,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 156 transitions. [2024-06-21 19:23:25,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35944700460829493 [2024-06-21 19:23:25,017 INFO L175 Difference]: Start difference. First operand has 519 places, 472 transitions, 5693 flow. Second operand 14 states and 156 transitions. [2024-06-21 19:23:25,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 496 transitions, 6783 flow [2024-06-21 19:23:26,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 496 transitions, 6681 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:26,878 INFO L231 Difference]: Finished difference. Result has 522 places, 475 transitions, 5733 flow [2024-06-21 19:23:26,878 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5597, PETRI_DIFFERENCE_MINUEND_PLACES=508, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=472, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5733, PETRI_PLACES=522, PETRI_TRANSITIONS=475} [2024-06-21 19:23:26,878 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 492 predicate places. [2024-06-21 19:23:26,878 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 475 transitions, 5733 flow [2024-06-21 19:23:26,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:26,879 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:26,879 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:26,879 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 19:23:26,879 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:26,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:26,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1599880738, now seen corresponding path program 25 times [2024-06-21 19:23:26,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:26,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031873568] [2024-06-21 19:23:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:26,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:26,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:28,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:28,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:28,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031873568] [2024-06-21 19:23:28,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031873568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:28,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:28,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:28,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448407581] [2024-06-21 19:23:28,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:28,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:28,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:28,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:28,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:28,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:28,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 475 transitions, 5733 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:28,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:28,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:28,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:29,992 INFO L124 PetriNetUnfolderBase]: 1243/2214 cut-off events. [2024-06-21 19:23:29,992 INFO L125 PetriNetUnfolderBase]: For 357626/357626 co-relation queries the response was YES. [2024-06-21 19:23:30,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15947 conditions, 2214 events. 1243/2214 cut-off events. For 357626/357626 co-relation queries the response was YES. Maximal size of possible extension queue 261. Compared 13710 event pairs, 211 based on Foata normal form. 2/2214 useless extension candidates. Maximal degree in co-relation 15728. Up to 2086 conditions per place. [2024-06-21 19:23:30,036 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 451 selfloop transitions, 45 changer transitions 0/498 dead transitions. [2024-06-21 19:23:30,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 498 transitions, 6805 flow [2024-06-21 19:23:30,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:23:30,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:23:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 158 transitions. [2024-06-21 19:23:30,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3640552995391705 [2024-06-21 19:23:30,038 INFO L175 Difference]: Start difference. First operand has 522 places, 475 transitions, 5733 flow. Second operand 14 states and 158 transitions. [2024-06-21 19:23:30,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 498 transitions, 6805 flow [2024-06-21 19:23:31,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 498 transitions, 6702 flow, removed 8 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:31,925 INFO L231 Difference]: Finished difference. Result has 525 places, 476 transitions, 5750 flow [2024-06-21 19:23:31,925 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5630, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=5750, PETRI_PLACES=525, PETRI_TRANSITIONS=476} [2024-06-21 19:23:31,925 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 495 predicate places. [2024-06-21 19:23:31,925 INFO L495 AbstractCegarLoop]: Abstraction has has 525 places, 476 transitions, 5750 flow [2024-06-21 19:23:31,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:31,926 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:31,926 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:31,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 19:23:31,926 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:31,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:31,926 INFO L85 PathProgramCache]: Analyzing trace with hash -876766468, now seen corresponding path program 26 times [2024-06-21 19:23:31,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:31,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386620408] [2024-06-21 19:23:31,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:31,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:33,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:33,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386620408] [2024-06-21 19:23:33,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386620408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:33,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:33,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:33,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399135926] [2024-06-21 19:23:33,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:33,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:33,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:33,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:33,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:34,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:34,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 525 places, 476 transitions, 5750 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:34,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:34,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:34,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:34,974 INFO L124 PetriNetUnfolderBase]: 1250/2227 cut-off events. [2024-06-21 19:23:34,974 INFO L125 PetriNetUnfolderBase]: For 362387/362387 co-relation queries the response was YES. [2024-06-21 19:23:35,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16058 conditions, 2227 events. 1250/2227 cut-off events. For 362387/362387 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 13803 event pairs, 217 based on Foata normal form. 2/2227 useless extension candidates. Maximal degree in co-relation 15838. Up to 2112 conditions per place. [2024-06-21 19:23:35,009 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 450 selfloop transitions, 45 changer transitions 0/497 dead transitions. [2024-06-21 19:23:35,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 497 transitions, 6836 flow [2024-06-21 19:23:35,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:23:35,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:23:35,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 132 transitions. [2024-06-21 19:23:35,011 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:23:35,011 INFO L175 Difference]: Start difference. First operand has 525 places, 476 transitions, 5750 flow. Second operand 11 states and 132 transitions. [2024-06-21 19:23:35,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 497 transitions, 6836 flow [2024-06-21 19:23:36,807 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 497 transitions, 6726 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-21 19:23:36,812 INFO L231 Difference]: Finished difference. Result has 524 places, 479 transitions, 5786 flow [2024-06-21 19:23:36,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5644, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5786, PETRI_PLACES=524, PETRI_TRANSITIONS=479} [2024-06-21 19:23:36,813 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 494 predicate places. [2024-06-21 19:23:36,813 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 479 transitions, 5786 flow [2024-06-21 19:23:36,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:36,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:36,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:36,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 19:23:36,814 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:36,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:36,814 INFO L85 PathProgramCache]: Analyzing trace with hash -7494438, now seen corresponding path program 27 times [2024-06-21 19:23:36,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:36,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754061109] [2024-06-21 19:23:36,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:36,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:36,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:38,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:38,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754061109] [2024-06-21 19:23:38,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754061109] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:38,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:38,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:38,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049319541] [2024-06-21 19:23:38,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:38,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:38,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:38,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:38,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:38,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:38,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 479 transitions, 5786 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:38,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:38,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:38,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:39,940 INFO L124 PetriNetUnfolderBase]: 1254/2235 cut-off events. [2024-06-21 19:23:39,940 INFO L125 PetriNetUnfolderBase]: For 366834/366834 co-relation queries the response was YES. [2024-06-21 19:23:39,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16123 conditions, 2235 events. 1254/2235 cut-off events. For 366834/366834 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 13867 event pairs, 221 based on Foata normal form. 2/2235 useless extension candidates. Maximal degree in co-relation 15903. Up to 2120 conditions per place. [2024-06-21 19:23:39,977 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 452 selfloop transitions, 44 changer transitions 0/498 dead transitions. [2024-06-21 19:23:39,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 498 transitions, 6852 flow [2024-06-21 19:23:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:23:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:23:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 133 transitions. [2024-06-21 19:23:39,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39002932551319647 [2024-06-21 19:23:39,979 INFO L175 Difference]: Start difference. First operand has 524 places, 479 transitions, 5786 flow. Second operand 11 states and 133 transitions. [2024-06-21 19:23:39,979 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 498 transitions, 6852 flow [2024-06-21 19:23:41,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 498 transitions, 6741 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 19:23:42,001 INFO L231 Difference]: Finished difference. Result has 526 places, 480 transitions, 5797 flow [2024-06-21 19:23:42,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5675, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5797, PETRI_PLACES=526, PETRI_TRANSITIONS=480} [2024-06-21 19:23:42,002 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 496 predicate places. [2024-06-21 19:23:42,002 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 480 transitions, 5797 flow [2024-06-21 19:23:42,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:42,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:42,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:42,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 19:23:42,002 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:42,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:42,003 INFO L85 PathProgramCache]: Analyzing trace with hash -7640448, now seen corresponding path program 28 times [2024-06-21 19:23:42,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:42,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864270091] [2024-06-21 19:23:42,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:42,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:42,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:44,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:44,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864270091] [2024-06-21 19:23:44,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864270091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:44,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:44,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:44,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599121434] [2024-06-21 19:23:44,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:44,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:44,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:44,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:44,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 480 transitions, 5797 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:44,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:44,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:44,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:45,779 INFO L124 PetriNetUnfolderBase]: 1251/2230 cut-off events. [2024-06-21 19:23:45,780 INFO L125 PetriNetUnfolderBase]: For 345114/345114 co-relation queries the response was YES. [2024-06-21 19:23:45,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15755 conditions, 2230 events. 1251/2230 cut-off events. For 345114/345114 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 13812 event pairs, 222 based on Foata normal form. 2/2230 useless extension candidates. Maximal degree in co-relation 15535. Up to 2127 conditions per place. [2024-06-21 19:23:45,816 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 460 selfloop transitions, 37 changer transitions 0/499 dead transitions. [2024-06-21 19:23:45,816 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 499 transitions, 6839 flow [2024-06-21 19:23:45,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:23:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:23:45,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2024-06-21 19:23:45,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3655913978494624 [2024-06-21 19:23:45,817 INFO L175 Difference]: Start difference. First operand has 526 places, 480 transitions, 5797 flow. Second operand 12 states and 136 transitions. [2024-06-21 19:23:45,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 499 transitions, 6839 flow [2024-06-21 19:23:47,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 499 transitions, 6711 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 19:23:47,814 INFO L231 Difference]: Finished difference. Result has 529 places, 480 transitions, 5747 flow [2024-06-21 19:23:47,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5669, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=5747, PETRI_PLACES=529, PETRI_TRANSITIONS=480} [2024-06-21 19:23:47,815 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 499 predicate places. [2024-06-21 19:23:47,815 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 480 transitions, 5747 flow [2024-06-21 19:23:47,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:47,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:47,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:47,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 19:23:47,815 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:47,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:47,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1650162563, now seen corresponding path program 18 times [2024-06-21 19:23:47,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:47,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332992074] [2024-06-21 19:23:47,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:47,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:47,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:50,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:50,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332992074] [2024-06-21 19:23:50,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332992074] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:50,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:50,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:23:50,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631606109] [2024-06-21 19:23:50,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:50,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:23:50,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:50,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:23:50,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:23:50,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:50,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 480 transitions, 5747 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) [2024-06-21 19:23:50,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:50,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:50,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:51,499 INFO L124 PetriNetUnfolderBase]: 1261/2248 cut-off events. [2024-06-21 19:23:51,499 INFO L125 PetriNetUnfolderBase]: For 349987/349987 co-relation queries the response was YES. [2024-06-21 19:23:51,531 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15865 conditions, 2248 events. 1261/2248 cut-off events. For 349987/349987 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 13940 event pairs, 132 based on Foata normal form. 2/2248 useless extension candidates. Maximal degree in co-relation 15643. Up to 1998 conditions per place. [2024-06-21 19:23:51,539 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 415 selfloop transitions, 92 changer transitions 0/509 dead transitions. [2024-06-21 19:23:51,539 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 509 transitions, 6905 flow [2024-06-21 19:23:51,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 19:23:51,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 19:23:51,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 174 transitions. [2024-06-21 19:23:51,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741935483870968 [2024-06-21 19:23:51,540 INFO L175 Difference]: Start difference. First operand has 529 places, 480 transitions, 5747 flow. Second operand 15 states and 174 transitions. [2024-06-21 19:23:51,540 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 509 transitions, 6905 flow [2024-06-21 19:23:53,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 509 transitions, 6813 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-21 19:23:53,582 INFO L231 Difference]: Finished difference. Result has 533 places, 483 transitions, 5919 flow [2024-06-21 19:23:53,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5655, PETRI_DIFFERENCE_MINUEND_PLACES=518, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=5919, PETRI_PLACES=533, PETRI_TRANSITIONS=483} [2024-06-21 19:23:53,583 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 503 predicate places. [2024-06-21 19:23:53,583 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 483 transitions, 5919 flow [2024-06-21 19:23:53,583 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) [2024-06-21 19:23:53,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:23:53,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:23:53,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 19:23:53,583 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:23:53,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:23:53,584 INFO L85 PathProgramCache]: Analyzing trace with hash -238605666, now seen corresponding path program 29 times [2024-06-21 19:23:53,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:23:53,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220918102] [2024-06-21 19:23:53,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:23:53,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:23:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:23:56,695 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:23:56,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:23:56,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220918102] [2024-06-21 19:23:56,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220918102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:23:56,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:23:56,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:23:56,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012695538] [2024-06-21 19:23:56,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:23:56,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:23:56,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:23:56,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:23:56,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:23:56,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:23:56,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 483 transitions, 5919 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:23:56,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:23:56,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:23:56,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:23:57,975 INFO L124 PetriNetUnfolderBase]: 1265/2256 cut-off events. [2024-06-21 19:23:57,975 INFO L125 PetriNetUnfolderBase]: For 355097/355097 co-relation queries the response was YES. [2024-06-21 19:23:58,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16093 conditions, 2256 events. 1265/2256 cut-off events. For 355097/355097 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 13981 event pairs, 166 based on Foata normal form. 2/2256 useless extension candidates. Maximal degree in co-relation 15870. Up to 1833 conditions per place. [2024-06-21 19:23:58,085 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 366 selfloop transitions, 140 changer transitions 0/508 dead transitions. [2024-06-21 19:23:58,085 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 508 transitions, 7134 flow [2024-06-21 19:23:58,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:23:58,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:23:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 142 transitions. [2024-06-21 19:23:58,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41642228739002934 [2024-06-21 19:23:58,087 INFO L175 Difference]: Start difference. First operand has 533 places, 483 transitions, 5919 flow. Second operand 11 states and 142 transitions. [2024-06-21 19:23:58,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 508 transitions, 7134 flow [2024-06-21 19:24:00,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 508 transitions, 6917 flow, removed 28 selfloop flow, removed 12 redundant places. [2024-06-21 19:24:00,081 INFO L231 Difference]: Finished difference. Result has 533 places, 486 transitions, 6063 flow [2024-06-21 19:24:00,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5702, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6063, PETRI_PLACES=533, PETRI_TRANSITIONS=486} [2024-06-21 19:24:00,081 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 503 predicate places. [2024-06-21 19:24:00,081 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 486 transitions, 6063 flow [2024-06-21 19:24:00,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:00,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:00,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:00,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 19:24:00,082 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:00,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:00,083 INFO L85 PathProgramCache]: Analyzing trace with hash 185711305, now seen corresponding path program 21 times [2024-06-21 19:24:00,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:00,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997868820] [2024-06-21 19:24:00,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:00,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:00,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:02,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:02,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:02,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997868820] [2024-06-21 19:24:02,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997868820] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:02,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:02,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:02,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143127502] [2024-06-21 19:24:02,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:02,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:02,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:02,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:02,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:02,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:24:02,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 486 transitions, 6063 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:02,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:02,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:24:02,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:03,934 INFO L124 PetriNetUnfolderBase]: 1323/2353 cut-off events. [2024-06-21 19:24:03,935 INFO L125 PetriNetUnfolderBase]: For 381529/381529 co-relation queries the response was YES. [2024-06-21 19:24:03,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16876 conditions, 2353 events. 1323/2353 cut-off events. For 381529/381529 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 14699 event pairs, 154 based on Foata normal form. 2/2353 useless extension candidates. Maximal degree in co-relation 16653. Up to 1242 conditions per place. [2024-06-21 19:24:03,972 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 298 selfloop transitions, 229 changer transitions 0/529 dead transitions. [2024-06-21 19:24:03,972 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 529 transitions, 8084 flow [2024-06-21 19:24:03,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:24:03,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:24:03,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 160 transitions. [2024-06-21 19:24:03,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-21 19:24:03,973 INFO L175 Difference]: Start difference. First operand has 533 places, 486 transitions, 6063 flow. Second operand 12 states and 160 transitions. [2024-06-21 19:24:03,973 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 529 transitions, 8084 flow [2024-06-21 19:24:05,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 529 transitions, 7752 flow, removed 28 selfloop flow, removed 8 redundant places. [2024-06-21 19:24:05,903 INFO L231 Difference]: Finished difference. Result has 539 places, 499 transitions, 6351 flow [2024-06-21 19:24:05,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=5731, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=216, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=268, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6351, PETRI_PLACES=539, PETRI_TRANSITIONS=499} [2024-06-21 19:24:05,904 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 509 predicate places. [2024-06-21 19:24:05,904 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 499 transitions, 6351 flow [2024-06-21 19:24:05,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:05,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:05,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:05,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 19:24:05,904 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:05,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:05,905 INFO L85 PathProgramCache]: Analyzing trace with hash 924901538, now seen corresponding path program 30 times [2024-06-21 19:24:05,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:05,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938280575] [2024-06-21 19:24:05,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:05,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:08,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:08,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:08,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938280575] [2024-06-21 19:24:08,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938280575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:08,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:08,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:08,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021377610] [2024-06-21 19:24:08,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:08,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:08,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:08,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:08,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:08,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:24:08,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 499 transitions, 6351 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:08,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:08,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:24:08,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:09,191 INFO L124 PetriNetUnfolderBase]: 1330/2366 cut-off events. [2024-06-21 19:24:09,191 INFO L125 PetriNetUnfolderBase]: For 386649/386649 co-relation queries the response was YES. [2024-06-21 19:24:09,222 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17317 conditions, 2366 events. 1330/2366 cut-off events. For 386649/386649 co-relation queries the response was YES. Maximal size of possible extension queue 281. Compared 14806 event pairs, 177 based on Foata normal form. 2/2366 useless extension candidates. Maximal degree in co-relation 17090. Up to 1941 conditions per place. [2024-06-21 19:24:09,229 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 383 selfloop transitions, 140 changer transitions 0/525 dead transitions. [2024-06-21 19:24:09,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 549 places, 525 transitions, 7600 flow [2024-06-21 19:24:09,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:09,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:09,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 19:24:09,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:24:09,231 INFO L175 Difference]: Start difference. First operand has 539 places, 499 transitions, 6351 flow. Second operand 11 states and 143 transitions. [2024-06-21 19:24:09,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 549 places, 525 transitions, 7600 flow [2024-06-21 19:24:11,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 525 transitions, 7327 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 19:24:11,287 INFO L231 Difference]: Finished difference. Result has 545 places, 505 transitions, 6476 flow [2024-06-21 19:24:11,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6079, PETRI_DIFFERENCE_MINUEND_PLACES=533, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=362, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6476, PETRI_PLACES=545, PETRI_TRANSITIONS=505} [2024-06-21 19:24:11,288 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 515 predicate places. [2024-06-21 19:24:11,288 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 505 transitions, 6476 flow [2024-06-21 19:24:11,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:11,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:11,288 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:11,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 19:24:11,289 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:11,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:11,289 INFO L85 PathProgramCache]: Analyzing trace with hash 180195320, now seen corresponding path program 31 times [2024-06-21 19:24:11,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:11,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618962308] [2024-06-21 19:24:11,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:11,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:11,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:13,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:13,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:13,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618962308] [2024-06-21 19:24:13,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618962308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:13,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:13,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:13,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751273392] [2024-06-21 19:24:13,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:13,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:13,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:13,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:13,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:13,317 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:24:13,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 505 transitions, 6476 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:13,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:13,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:24:13,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:14,377 INFO L124 PetriNetUnfolderBase]: 1345/2395 cut-off events. [2024-06-21 19:24:14,377 INFO L125 PetriNetUnfolderBase]: For 420935/420935 co-relation queries the response was YES. [2024-06-21 19:24:14,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17734 conditions, 2395 events. 1345/2395 cut-off events. For 420935/420935 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 15009 event pairs, 176 based on Foata normal form. 2/2395 useless extension candidates. Maximal degree in co-relation 17506. Up to 1941 conditions per place. [2024-06-21 19:24:14,417 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 385 selfloop transitions, 143 changer transitions 0/530 dead transitions. [2024-06-21 19:24:14,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 530 transitions, 8058 flow [2024-06-21 19:24:14,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:14,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:14,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 145 transitions. [2024-06-21 19:24:14,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4252199413489736 [2024-06-21 19:24:14,418 INFO L175 Difference]: Start difference. First operand has 545 places, 505 transitions, 6476 flow. Second operand 11 states and 145 transitions. [2024-06-21 19:24:14,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 530 transitions, 8058 flow [2024-06-21 19:24:16,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 530 transitions, 7733 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 19:24:16,791 INFO L231 Difference]: Finished difference. Result has 551 places, 508 transitions, 6543 flow [2024-06-21 19:24:16,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6155, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=505, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6543, PETRI_PLACES=551, PETRI_TRANSITIONS=508} [2024-06-21 19:24:16,791 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 521 predicate places. [2024-06-21 19:24:16,791 INFO L495 AbstractCegarLoop]: Abstraction has has 551 places, 508 transitions, 6543 flow [2024-06-21 19:24:16,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:16,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:16,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:16,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 19:24:16,792 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:16,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:16,793 INFO L85 PathProgramCache]: Analyzing trace with hash 925051423, now seen corresponding path program 22 times [2024-06-21 19:24:16,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:16,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49252059] [2024-06-21 19:24:16,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:16,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:19,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:19,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:19,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49252059] [2024-06-21 19:24:19,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49252059] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:19,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:19,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:19,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55940590] [2024-06-21 19:24:19,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:19,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:19,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:19,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:19,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:19,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:24:19,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 551 places, 508 transitions, 6543 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:19,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:19,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:24:19,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:20,929 INFO L124 PetriNetUnfolderBase]: 1341/2389 cut-off events. [2024-06-21 19:24:20,930 INFO L125 PetriNetUnfolderBase]: For 397683/397683 co-relation queries the response was YES. [2024-06-21 19:24:20,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17340 conditions, 2389 events. 1341/2389 cut-off events. For 397683/397683 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 14984 event pairs, 156 based on Foata normal form. 2/2389 useless extension candidates. Maximal degree in co-relation 17110. Up to 1278 conditions per place. [2024-06-21 19:24:20,973 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 306 selfloop transitions, 227 changer transitions 0/535 dead transitions. [2024-06-21 19:24:20,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 535 transitions, 8096 flow [2024-06-21 19:24:20,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:24:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:24:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 160 transitions. [2024-06-21 19:24:20,975 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43010752688172044 [2024-06-21 19:24:20,975 INFO L175 Difference]: Start difference. First operand has 551 places, 508 transitions, 6543 flow. Second operand 12 states and 160 transitions. [2024-06-21 19:24:20,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 535 transitions, 8096 flow [2024-06-21 19:24:23,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 535 transitions, 7852 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-21 19:24:23,202 INFO L231 Difference]: Finished difference. Result has 557 places, 509 transitions, 6771 flow [2024-06-21 19:24:23,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6299, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=508, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=226, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6771, PETRI_PLACES=557, PETRI_TRANSITIONS=509} [2024-06-21 19:24:23,203 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 527 predicate places. [2024-06-21 19:24:23,203 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 509 transitions, 6771 flow [2024-06-21 19:24:23,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:23,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:23,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:23,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 19:24:23,203 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:23,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash 925045688, now seen corresponding path program 32 times [2024-06-21 19:24:23,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:23,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837833691] [2024-06-21 19:24:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:23,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:26,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:26,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837833691] [2024-06-21 19:24:26,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837833691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:26,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:26,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:26,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491271450] [2024-06-21 19:24:26,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:26,379 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:26,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:26,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:26,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:24:26,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 509 transitions, 6771 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:26,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:26,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:24:26,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:27,677 INFO L124 PetriNetUnfolderBase]: 1338/2384 cut-off events. [2024-06-21 19:24:27,677 INFO L125 PetriNetUnfolderBase]: For 374226/374226 co-relation queries the response was YES. [2024-06-21 19:24:27,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17398 conditions, 2384 events. 1338/2384 cut-off events. For 374226/374226 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 14956 event pairs, 176 based on Foata normal form. 2/2384 useless extension candidates. Maximal degree in co-relation 17164. Up to 1959 conditions per place. [2024-06-21 19:24:27,717 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 388 selfloop transitions, 139 changer transitions 0/529 dead transitions. [2024-06-21 19:24:27,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 567 places, 529 transitions, 7927 flow [2024-06-21 19:24:27,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:27,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 144 transitions. [2024-06-21 19:24:27,718 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4222873900293255 [2024-06-21 19:24:27,718 INFO L175 Difference]: Start difference. First operand has 557 places, 509 transitions, 6771 flow. Second operand 11 states and 144 transitions. [2024-06-21 19:24:27,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 567 places, 529 transitions, 7927 flow [2024-06-21 19:24:29,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 559 places, 529 transitions, 7489 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-21 19:24:29,735 INFO L231 Difference]: Finished difference. Result has 560 places, 509 transitions, 6615 flow [2024-06-21 19:24:29,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6333, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=370, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6615, PETRI_PLACES=560, PETRI_TRANSITIONS=509} [2024-06-21 19:24:29,735 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 530 predicate places. [2024-06-21 19:24:29,735 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 509 transitions, 6615 flow [2024-06-21 19:24:29,736 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:29,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:29,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:29,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 19:24:29,736 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:29,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:29,736 INFO L85 PathProgramCache]: Analyzing trace with hash 62563012, now seen corresponding path program 33 times [2024-06-21 19:24:29,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:29,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475489958] [2024-06-21 19:24:29,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:29,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:29,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:31,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:31,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:31,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475489958] [2024-06-21 19:24:31,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475489958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:31,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:31,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:24:31,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594306727] [2024-06-21 19:24:31,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:31,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:24:31,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:31,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:24:31,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:24:31,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:24:31,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 509 transitions, 6615 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) [2024-06-21 19:24:31,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:31,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:24:31,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:33,031 INFO L124 PetriNetUnfolderBase]: 1342/2391 cut-off events. [2024-06-21 19:24:33,031 INFO L125 PetriNetUnfolderBase]: For 377876/377876 co-relation queries the response was YES. [2024-06-21 19:24:33,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17194 conditions, 2391 events. 1342/2391 cut-off events. For 377876/377876 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 15025 event pairs, 265 based on Foata normal form. 2/2391 useless extension candidates. Maximal degree in co-relation 16960. Up to 2277 conditions per place. [2024-06-21 19:24:33,072 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 506 selfloop transitions, 28 changer transitions 0/536 dead transitions. [2024-06-21 19:24:33,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 573 places, 536 transitions, 8154 flow [2024-06-21 19:24:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:24:33,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:24:33,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 154 transitions. [2024-06-21 19:24:33,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:24:33,074 INFO L175 Difference]: Start difference. First operand has 560 places, 509 transitions, 6615 flow. Second operand 14 states and 154 transitions. [2024-06-21 19:24:33,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 573 places, 536 transitions, 8154 flow [2024-06-21 19:24:35,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 564 places, 536 transitions, 7867 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-21 19:24:35,200 INFO L231 Difference]: Finished difference. Result has 566 places, 512 transitions, 6467 flow [2024-06-21 19:24:35,200 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=551, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6467, PETRI_PLACES=566, PETRI_TRANSITIONS=512} [2024-06-21 19:24:35,201 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 536 predicate places. [2024-06-21 19:24:35,201 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 512 transitions, 6467 flow [2024-06-21 19:24:35,201 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) [2024-06-21 19:24:35,201 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:35,201 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:35,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 19:24:35,201 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:35,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:35,202 INFO L85 PathProgramCache]: Analyzing trace with hash 64436962, now seen corresponding path program 34 times [2024-06-21 19:24:35,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:35,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303101931] [2024-06-21 19:24:35,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:35,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:35,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:37,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:37,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:37,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303101931] [2024-06-21 19:24:37,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303101931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:37,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:37,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:37,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242351208] [2024-06-21 19:24:37,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:37,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:37,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:37,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:37,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:37,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:24:37,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 512 transitions, 6467 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:37,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:37,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:24:37,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:38,849 INFO L124 PetriNetUnfolderBase]: 1356/2417 cut-off events. [2024-06-21 19:24:38,849 INFO L125 PetriNetUnfolderBase]: For 411267/411267 co-relation queries the response was YES. [2024-06-21 19:24:38,883 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17582 conditions, 2417 events. 1356/2417 cut-off events. For 411267/411267 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 15241 event pairs, 268 based on Foata normal form. 2/2417 useless extension candidates. Maximal degree in co-relation 17346. Up to 2334 conditions per place. [2024-06-21 19:24:38,889 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 508 selfloop transitions, 28 changer transitions 0/538 dead transitions. [2024-06-21 19:24:38,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 578 places, 538 transitions, 8024 flow [2024-06-21 19:24:38,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:24:38,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:24:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 147 transitions. [2024-06-21 19:24:38,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36476426799007444 [2024-06-21 19:24:38,891 INFO L175 Difference]: Start difference. First operand has 566 places, 512 transitions, 6467 flow. Second operand 13 states and 147 transitions. [2024-06-21 19:24:38,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 578 places, 538 transitions, 8024 flow [2024-06-21 19:24:41,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 567 places, 538 transitions, 7862 flow, removed 41 selfloop flow, removed 11 redundant places. [2024-06-21 19:24:41,131 INFO L231 Difference]: Finished difference. Result has 568 places, 516 transitions, 6458 flow [2024-06-21 19:24:41,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6328, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6458, PETRI_PLACES=568, PETRI_TRANSITIONS=516} [2024-06-21 19:24:41,132 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 538 predicate places. [2024-06-21 19:24:41,132 INFO L495 AbstractCegarLoop]: Abstraction has has 568 places, 516 transitions, 6458 flow [2024-06-21 19:24:41,132 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:41,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:41,132 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:41,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-21 19:24:41,133 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:41,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:41,133 INFO L85 PathProgramCache]: Analyzing trace with hash 64440682, now seen corresponding path program 35 times [2024-06-21 19:24:41,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:41,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876254769] [2024-06-21 19:24:41,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:41,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:43,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:43,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:43,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876254769] [2024-06-21 19:24:43,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876254769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:43,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:43,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:43,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491479902] [2024-06-21 19:24:43,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:43,249 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:43,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:43,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:43,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:43,429 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:24:43,429 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 568 places, 516 transitions, 6458 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:43,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:43,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:24:43,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:44,633 INFO L124 PetriNetUnfolderBase]: 1353/2412 cut-off events. [2024-06-21 19:24:44,634 INFO L125 PetriNetUnfolderBase]: For 385678/385678 co-relation queries the response was YES. [2024-06-21 19:24:44,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16968 conditions, 2412 events. 1353/2412 cut-off events. For 385678/385678 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 15221 event pairs, 269 based on Foata normal form. 2/2412 useless extension candidates. Maximal degree in co-relation 16734. Up to 2346 conditions per place. [2024-06-21 19:24:44,672 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 507 selfloop transitions, 27 changer transitions 0/536 dead transitions. [2024-06-21 19:24:44,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 580 places, 536 transitions, 7578 flow [2024-06-21 19:24:44,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:24:44,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:24:44,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 144 transitions. [2024-06-21 19:24:44,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573200992555831 [2024-06-21 19:24:44,673 INFO L175 Difference]: Start difference. First operand has 568 places, 516 transitions, 6458 flow. Second operand 13 states and 144 transitions. [2024-06-21 19:24:44,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 580 places, 536 transitions, 7578 flow [2024-06-21 19:24:46,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 536 transitions, 7511 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-21 19:24:46,473 INFO L231 Difference]: Finished difference. Result has 573 places, 516 transitions, 6449 flow [2024-06-21 19:24:46,473 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6391, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6449, PETRI_PLACES=573, PETRI_TRANSITIONS=516} [2024-06-21 19:24:46,473 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 543 predicate places. [2024-06-21 19:24:46,473 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 516 transitions, 6449 flow [2024-06-21 19:24:46,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:46,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:46,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:46,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-21 19:24:46,474 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:46,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:46,474 INFO L85 PathProgramCache]: Analyzing trace with hash 151282377, now seen corresponding path program 23 times [2024-06-21 19:24:46,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:46,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409047313] [2024-06-21 19:24:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:46,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:49,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:49,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409047313] [2024-06-21 19:24:49,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409047313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:49,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:49,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:49,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046874918] [2024-06-21 19:24:49,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:49,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:49,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:49,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:49,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:49,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:24:49,877 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 516 transitions, 6449 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:49,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:49,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:24:49,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:51,266 INFO L124 PetriNetUnfolderBase]: 1349/2406 cut-off events. [2024-06-21 19:24:51,267 INFO L125 PetriNetUnfolderBase]: For 360446/360446 co-relation queries the response was YES. [2024-06-21 19:24:51,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16601 conditions, 2406 events. 1349/2406 cut-off events. For 360446/360446 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 15178 event pairs, 266 based on Foata normal form. 2/2406 useless extension candidates. Maximal degree in co-relation 16365. Up to 2324 conditions per place. [2024-06-21 19:24:51,327 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 502 selfloop transitions, 30 changer transitions 0/534 dead transitions. [2024-06-21 19:24:51,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 534 transitions, 7563 flow [2024-06-21 19:24:51,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:51,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:51,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 19:24:51,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 19:24:51,329 INFO L175 Difference]: Start difference. First operand has 573 places, 516 transitions, 6449 flow. Second operand 11 states and 129 transitions. [2024-06-21 19:24:51,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 534 transitions, 7563 flow [2024-06-21 19:24:53,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 571 places, 534 transitions, 7486 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-06-21 19:24:53,330 INFO L231 Difference]: Finished difference. Result has 572 places, 516 transitions, 6437 flow [2024-06-21 19:24:53,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6372, PETRI_DIFFERENCE_MINUEND_PLACES=561, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6437, PETRI_PLACES=572, PETRI_TRANSITIONS=516} [2024-06-21 19:24:53,331 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 542 predicate places. [2024-06-21 19:24:53,331 INFO L495 AbstractCegarLoop]: Abstraction has has 572 places, 516 transitions, 6437 flow [2024-06-21 19:24:53,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:53,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:53,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:53,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-21 19:24:53,332 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:53,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:53,332 INFO L85 PathProgramCache]: Analyzing trace with hash 151276642, now seen corresponding path program 36 times [2024-06-21 19:24:53,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:53,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726343090] [2024-06-21 19:24:53,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:53,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:24:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:24:55,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:24:55,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726343090] [2024-06-21 19:24:55,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726343090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:24:55,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:24:55,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:24:55,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020384653] [2024-06-21 19:24:55,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:24:55,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:24:55,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:24:55,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:24:55,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:24:55,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:24:55,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 572 places, 516 transitions, 6437 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:55,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:24:55,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:24:55,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:24:56,961 INFO L124 PetriNetUnfolderBase]: 1356/2419 cut-off events. [2024-06-21 19:24:56,961 INFO L125 PetriNetUnfolderBase]: For 364704/364704 co-relation queries the response was YES. [2024-06-21 19:24:56,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16713 conditions, 2419 events. 1356/2419 cut-off events. For 364704/364704 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 15284 event pairs, 270 based on Foata normal form. 2/2419 useless extension candidates. Maximal degree in co-relation 16476. Up to 2352 conditions per place. [2024-06-21 19:24:56,999 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 505 selfloop transitions, 29 changer transitions 0/536 dead transitions. [2024-06-21 19:24:56,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 582 places, 536 transitions, 7604 flow [2024-06-21 19:24:56,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:24:57,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:24:57,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 19:24:57,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 19:24:57,000 INFO L175 Difference]: Start difference. First operand has 572 places, 516 transitions, 6437 flow. Second operand 11 states and 126 transitions. [2024-06-21 19:24:57,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 582 places, 536 transitions, 7604 flow [2024-06-21 19:24:58,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 572 places, 536 transitions, 7530 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-06-21 19:24:58,891 INFO L231 Difference]: Finished difference. Result has 573 places, 519 transitions, 6482 flow [2024-06-21 19:24:58,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6369, PETRI_DIFFERENCE_MINUEND_PLACES=562, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6482, PETRI_PLACES=573, PETRI_TRANSITIONS=519} [2024-06-21 19:24:58,891 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 543 predicate places. [2024-06-21 19:24:58,891 INFO L495 AbstractCegarLoop]: Abstraction has has 573 places, 519 transitions, 6482 flow [2024-06-21 19:24:58,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:24:58,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:24:58,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:24:58,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-21 19:24:58,892 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:24:58,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:24:58,892 INFO L85 PathProgramCache]: Analyzing trace with hash 151128772, now seen corresponding path program 37 times [2024-06-21 19:24:58,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:24:58,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783257060] [2024-06-21 19:24:58,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:24:58,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:24:58,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:00,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:00,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:00,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783257060] [2024-06-21 19:25:00,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783257060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:00,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:00,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:00,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142289042] [2024-06-21 19:25:00,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:00,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:00,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:00,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:00,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:00,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:00,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 573 places, 519 transitions, 6482 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:00,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:00,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:00,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:01,834 INFO L124 PetriNetUnfolderBase]: 1360/2427 cut-off events. [2024-06-21 19:25:01,834 INFO L125 PetriNetUnfolderBase]: For 369101/369101 co-relation queries the response was YES. [2024-06-21 19:25:01,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16788 conditions, 2427 events. 1360/2427 cut-off events. For 369101/369101 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 15354 event pairs, 268 based on Foata normal form. 2/2427 useless extension candidates. Maximal degree in co-relation 16550. Up to 2337 conditions per place. [2024-06-21 19:25:01,875 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 507 selfloop transitions, 30 changer transitions 0/539 dead transitions. [2024-06-21 19:25:01,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 583 places, 539 transitions, 7975 flow [2024-06-21 19:25:01,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:01,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:01,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 129 transitions. [2024-06-21 19:25:01,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3782991202346041 [2024-06-21 19:25:01,877 INFO L175 Difference]: Start difference. First operand has 573 places, 519 transitions, 6482 flow. Second operand 11 states and 129 transitions. [2024-06-21 19:25:01,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 583 places, 539 transitions, 7975 flow [2024-06-21 19:25:03,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 574 places, 539 transitions, 7898 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 19:25:03,853 INFO L231 Difference]: Finished difference. Result has 575 places, 520 transitions, 6494 flow [2024-06-21 19:25:03,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6405, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6494, PETRI_PLACES=575, PETRI_TRANSITIONS=520} [2024-06-21 19:25:03,853 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 545 predicate places. [2024-06-21 19:25:03,854 INFO L495 AbstractCegarLoop]: Abstraction has has 575 places, 520 transitions, 6494 flow [2024-06-21 19:25:03,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:03,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:03,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:03,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-21 19:25:03,854 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:03,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:03,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1151081946, now seen corresponding path program 38 times [2024-06-21 19:25:03,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:03,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350796789] [2024-06-21 19:25:03,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:03,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:07,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:07,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:07,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350796789] [2024-06-21 19:25:07,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350796789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:07,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:07,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:25:07,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81900627] [2024-06-21 19:25:07,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:07,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:25:07,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:07,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:25:07,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:25:07,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:07,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 575 places, 520 transitions, 6494 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) [2024-06-21 19:25:07,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:07,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:07,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:08,305 INFO L124 PetriNetUnfolderBase]: 1357/2422 cut-off events. [2024-06-21 19:25:08,305 INFO L125 PetriNetUnfolderBase]: For 342948/342948 co-relation queries the response was YES. [2024-06-21 19:25:08,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16404 conditions, 2422 events. 1357/2422 cut-off events. For 342948/342948 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 15340 event pairs, 269 based on Foata normal form. 2/2422 useless extension candidates. Maximal degree in co-relation 16166. Up to 2366 conditions per place. [2024-06-21 19:25:08,346 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 510 selfloop transitions, 25 changer transitions 0/537 dead transitions. [2024-06-21 19:25:08,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 537 transitions, 7608 flow [2024-06-21 19:25:08,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:25:08,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:25:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 19:25:08,348 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-21 19:25:08,348 INFO L175 Difference]: Start difference. First operand has 575 places, 520 transitions, 6494 flow. Second operand 12 states and 131 transitions. [2024-06-21 19:25:08,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 537 transitions, 7608 flow [2024-06-21 19:25:10,173 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 537 transitions, 7450 flow, removed 19 selfloop flow, removed 11 redundant places. [2024-06-21 19:25:10,179 INFO L231 Difference]: Finished difference. Result has 576 places, 520 transitions, 6390 flow [2024-06-21 19:25:10,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6336, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6390, PETRI_PLACES=576, PETRI_TRANSITIONS=520} [2024-06-21 19:25:10,179 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 546 predicate places. [2024-06-21 19:25:10,179 INFO L495 AbstractCegarLoop]: Abstraction has has 576 places, 520 transitions, 6390 flow [2024-06-21 19:25:10,180 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) [2024-06-21 19:25:10,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:10,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:10,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-21 19:25:10,180 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:10,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:10,180 INFO L85 PathProgramCache]: Analyzing trace with hash -993975620, now seen corresponding path program 39 times [2024-06-21 19:25:10,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:10,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581390440] [2024-06-21 19:25:10,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:10,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:10,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:12,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:12,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581390440] [2024-06-21 19:25:12,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581390440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:12,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:12,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:12,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398319220] [2024-06-21 19:25:12,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:12,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:12,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:12,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:12,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:12,921 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:12,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 576 places, 520 transitions, 6390 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:12,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:12,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:12,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:13,872 INFO L124 PetriNetUnfolderBase]: 1364/2435 cut-off events. [2024-06-21 19:25:13,872 INFO L125 PetriNetUnfolderBase]: For 346740/346740 co-relation queries the response was YES. [2024-06-21 19:25:13,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16390 conditions, 2435 events. 1364/2435 cut-off events. For 346740/346740 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 15450 event pairs, 274 based on Foata normal form. 2/2435 useless extension candidates. Maximal degree in co-relation 16151. Up to 2273 conditions per place. [2024-06-21 19:25:13,912 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 480 selfloop transitions, 61 changer transitions 0/543 dead transitions. [2024-06-21 19:25:13,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 586 places, 543 transitions, 7668 flow [2024-06-21 19:25:13,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:13,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 140 transitions. [2024-06-21 19:25:13,913 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-06-21 19:25:13,913 INFO L175 Difference]: Start difference. First operand has 576 places, 520 transitions, 6390 flow. Second operand 11 states and 140 transitions. [2024-06-21 19:25:13,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 586 places, 543 transitions, 7668 flow [2024-06-21 19:25:15,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 575 places, 543 transitions, 7608 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 19:25:15,939 INFO L231 Difference]: Finished difference. Result has 577 places, 524 transitions, 6554 flow [2024-06-21 19:25:15,940 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6330, PETRI_DIFFERENCE_MINUEND_PLACES=565, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6554, PETRI_PLACES=577, PETRI_TRANSITIONS=524} [2024-06-21 19:25:15,940 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 547 predicate places. [2024-06-21 19:25:15,940 INFO L495 AbstractCegarLoop]: Abstraction has has 577 places, 524 transitions, 6554 flow [2024-06-21 19:25:15,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:15,940 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:15,941 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:15,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-21 19:25:15,941 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:15,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:15,942 INFO L85 PathProgramCache]: Analyzing trace with hash -569658649, now seen corresponding path program 24 times [2024-06-21 19:25:15,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:15,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16925690] [2024-06-21 19:25:15,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:15,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:19,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:19,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:19,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16925690] [2024-06-21 19:25:19,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16925690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:19,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:19,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:19,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776019463] [2024-06-21 19:25:19,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:19,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:19,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:19,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:19,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:19,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:19,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 577 places, 524 transitions, 6554 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:19,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:19,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:19,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:21,094 INFO L124 PetriNetUnfolderBase]: 1394/2485 cut-off events. [2024-06-21 19:25:21,095 INFO L125 PetriNetUnfolderBase]: For 351941/351941 co-relation queries the response was YES. [2024-06-21 19:25:21,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16782 conditions, 2485 events. 1394/2485 cut-off events. For 351941/351941 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 15835 event pairs, 250 based on Foata normal form. 2/2485 useless extension candidates. Maximal degree in co-relation 16542. Up to 2266 conditions per place. [2024-06-21 19:25:21,136 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 501 selfloop transitions, 63 changer transitions 0/566 dead transitions. [2024-06-21 19:25:21,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 588 places, 566 transitions, 7996 flow [2024-06-21 19:25:21,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:25:21,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:25:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 153 transitions. [2024-06-21 19:25:21,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-06-21 19:25:21,138 INFO L175 Difference]: Start difference. First operand has 577 places, 524 transitions, 6554 flow. Second operand 12 states and 153 transitions. [2024-06-21 19:25:21,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 588 places, 566 transitions, 7996 flow [2024-06-21 19:25:23,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 580 places, 566 transitions, 7806 flow, removed 32 selfloop flow, removed 8 redundant places. [2024-06-21 19:25:23,184 INFO L231 Difference]: Finished difference. Result has 583 places, 541 transitions, 6735 flow [2024-06-21 19:25:23,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6372, PETRI_DIFFERENCE_MINUEND_PLACES=569, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6735, PETRI_PLACES=583, PETRI_TRANSITIONS=541} [2024-06-21 19:25:23,184 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 553 predicate places. [2024-06-21 19:25:23,184 INFO L495 AbstractCegarLoop]: Abstraction has has 583 places, 541 transitions, 6735 flow [2024-06-21 19:25:23,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:23,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:23,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:23,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-21 19:25:23,185 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:23,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:23,185 INFO L85 PathProgramCache]: Analyzing trace with hash -569812254, now seen corresponding path program 40 times [2024-06-21 19:25:23,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:23,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392569741] [2024-06-21 19:25:23,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:23,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:23,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:25,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:25,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392569741] [2024-06-21 19:25:25,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392569741] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:25,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:25:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420752308] [2024-06-21 19:25:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:25,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:25:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:25,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:25:25,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:25:25,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:25,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 583 places, 541 transitions, 6735 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) [2024-06-21 19:25:25,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:25,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:25,212 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:26,319 INFO L124 PetriNetUnfolderBase]: 1409/2514 cut-off events. [2024-06-21 19:25:26,319 INFO L125 PetriNetUnfolderBase]: For 387986/387986 co-relation queries the response was YES. [2024-06-21 19:25:26,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17433 conditions, 2514 events. 1409/2514 cut-off events. For 387986/387986 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 16064 event pairs, 281 based on Foata normal form. 2/2514 useless extension candidates. Maximal degree in co-relation 17189. Up to 2327 conditions per place. [2024-06-21 19:25:26,360 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 496 selfloop transitions, 67 changer transitions 0/565 dead transitions. [2024-06-21 19:25:26,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 594 places, 565 transitions, 8431 flow [2024-06-21 19:25:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:25:26,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:25:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 147 transitions. [2024-06-21 19:25:26,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951612903225806 [2024-06-21 19:25:26,361 INFO L175 Difference]: Start difference. First operand has 583 places, 541 transitions, 6735 flow. Second operand 12 states and 147 transitions. [2024-06-21 19:25:26,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 594 places, 565 transitions, 8431 flow [2024-06-21 19:25:28,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 587 places, 565 transitions, 8249 flow, removed 65 selfloop flow, removed 7 redundant places. [2024-06-21 19:25:28,557 INFO L231 Difference]: Finished difference. Result has 590 places, 546 transitions, 6871 flow [2024-06-21 19:25:28,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6597, PETRI_DIFFERENCE_MINUEND_PLACES=576, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=541, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6871, PETRI_PLACES=590, PETRI_TRANSITIONS=546} [2024-06-21 19:25:28,557 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 560 predicate places. [2024-06-21 19:25:28,558 INFO L495 AbstractCegarLoop]: Abstraction has has 590 places, 546 transitions, 6871 flow [2024-06-21 19:25:28,558 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) [2024-06-21 19:25:28,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:28,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:28,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-21 19:25:28,558 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:28,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:28,558 INFO L85 PathProgramCache]: Analyzing trace with hash -569808534, now seen corresponding path program 41 times [2024-06-21 19:25:28,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:28,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189309619] [2024-06-21 19:25:28,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:28,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:30,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:30,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189309619] [2024-06-21 19:25:30,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189309619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:30,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:30,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:30,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341566658] [2024-06-21 19:25:30,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:30,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:30,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:30,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:30,596 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:30,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 590 places, 546 transitions, 6871 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:30,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:30,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:30,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:31,633 INFO L124 PetriNetUnfolderBase]: 1413/2522 cut-off events. [2024-06-21 19:25:31,633 INFO L125 PetriNetUnfolderBase]: For 391988/391988 co-relation queries the response was YES. [2024-06-21 19:25:31,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17487 conditions, 2522 events. 1413/2522 cut-off events. For 391988/391988 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 16136 event pairs, 281 based on Foata normal form. 2/2522 useless extension candidates. Maximal degree in co-relation 17242. Up to 2360 conditions per place. [2024-06-21 19:25:31,678 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 498 selfloop transitions, 64 changer transitions 0/564 dead transitions. [2024-06-21 19:25:31,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 600 places, 564 transitions, 8092 flow [2024-06-21 19:25:31,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:31,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:31,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 139 transitions. [2024-06-21 19:25:31,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40762463343108507 [2024-06-21 19:25:31,680 INFO L175 Difference]: Start difference. First operand has 590 places, 546 transitions, 6871 flow. Second operand 11 states and 139 transitions. [2024-06-21 19:25:31,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 600 places, 564 transitions, 8092 flow [2024-06-21 19:25:33,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 593 places, 564 transitions, 7937 flow, removed 44 selfloop flow, removed 7 redundant places. [2024-06-21 19:25:33,855 INFO L231 Difference]: Finished difference. Result has 594 places, 547 transitions, 6895 flow [2024-06-21 19:25:33,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6734, PETRI_DIFFERENCE_MINUEND_PLACES=583, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6895, PETRI_PLACES=594, PETRI_TRANSITIONS=547} [2024-06-21 19:25:33,856 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 564 predicate places. [2024-06-21 19:25:33,856 INFO L495 AbstractCegarLoop]: Abstraction has has 594 places, 547 transitions, 6895 flow [2024-06-21 19:25:33,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:33,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:33,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:33,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-21 19:25:33,856 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:33,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:33,857 INFO L85 PathProgramCache]: Analyzing trace with hash -564302004, now seen corresponding path program 42 times [2024-06-21 19:25:33,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:33,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981650086] [2024-06-21 19:25:33,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:33,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:33,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:36,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:36,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981650086] [2024-06-21 19:25:36,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981650086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:36,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:36,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:36,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115828418] [2024-06-21 19:25:36,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:36,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:36,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:36,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:36,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:36,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:36,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 594 places, 547 transitions, 6895 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:36,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:36,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:36,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:37,543 INFO L124 PetriNetUnfolderBase]: 1410/2517 cut-off events. [2024-06-21 19:25:37,543 INFO L125 PetriNetUnfolderBase]: For 362325/362325 co-relation queries the response was YES. [2024-06-21 19:25:37,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17039 conditions, 2517 events. 1410/2517 cut-off events. For 362325/362325 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 16101 event pairs, 280 based on Foata normal form. 2/2517 useless extension candidates. Maximal degree in co-relation 16794. Up to 2355 conditions per place. [2024-06-21 19:25:37,586 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 496 selfloop transitions, 66 changer transitions 0/564 dead transitions. [2024-06-21 19:25:37,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 604 places, 564 transitions, 8071 flow [2024-06-21 19:25:37,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:37,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:37,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 138 transitions. [2024-06-21 19:25:37,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4046920821114369 [2024-06-21 19:25:37,588 INFO L175 Difference]: Start difference. First operand has 594 places, 547 transitions, 6895 flow. Second operand 11 states and 138 transitions. [2024-06-21 19:25:37,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 604 places, 564 transitions, 8071 flow [2024-06-21 19:25:39,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 595 places, 564 transitions, 7899 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-21 19:25:39,799 INFO L231 Difference]: Finished difference. Result has 596 places, 547 transitions, 6859 flow [2024-06-21 19:25:39,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6723, PETRI_DIFFERENCE_MINUEND_PLACES=585, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6859, PETRI_PLACES=596, PETRI_TRANSITIONS=547} [2024-06-21 19:25:39,800 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 566 predicate places. [2024-06-21 19:25:39,800 INFO L495 AbstractCegarLoop]: Abstraction has has 596 places, 547 transitions, 6859 flow [2024-06-21 19:25:39,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:39,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:39,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:39,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-21 19:25:39,801 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:39,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:39,801 INFO L85 PathProgramCache]: Analyzing trace with hash -564296269, now seen corresponding path program 25 times [2024-06-21 19:25:39,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:39,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57060704] [2024-06-21 19:25:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:39,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:39,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:43,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:43,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:43,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57060704] [2024-06-21 19:25:43,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57060704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:43,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:43,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:43,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325388981] [2024-06-21 19:25:43,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:43,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:43,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:43,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:43,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:43,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:43,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 596 places, 547 transitions, 6859 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:43,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:43,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:43,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:45,051 INFO L124 PetriNetUnfolderBase]: 1416/2527 cut-off events. [2024-06-21 19:25:45,051 INFO L125 PetriNetUnfolderBase]: For 366036/366036 co-relation queries the response was YES. [2024-06-21 19:25:45,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17034 conditions, 2527 events. 1416/2527 cut-off events. For 366036/366036 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 16204 event pairs, 248 based on Foata normal form. 2/2527 useless extension candidates. Maximal degree in co-relation 16788. Up to 2308 conditions per place. [2024-06-21 19:25:45,093 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 506 selfloop transitions, 65 changer transitions 0/573 dead transitions. [2024-06-21 19:25:45,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 607 places, 573 transitions, 8132 flow [2024-06-21 19:25:45,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:25:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:25:45,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 152 transitions. [2024-06-21 19:25:45,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40860215053763443 [2024-06-21 19:25:45,094 INFO L175 Difference]: Start difference. First operand has 596 places, 547 transitions, 6859 flow. Second operand 12 states and 152 transitions. [2024-06-21 19:25:45,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 607 places, 573 transitions, 8132 flow [2024-06-21 19:25:47,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 573 transitions, 7994 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 19:25:47,288 INFO L231 Difference]: Finished difference. Result has 600 places, 549 transitions, 6896 flow [2024-06-21 19:25:47,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=482, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6896, PETRI_PLACES=600, PETRI_TRANSITIONS=549} [2024-06-21 19:25:47,289 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 570 predicate places. [2024-06-21 19:25:47,289 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 549 transitions, 6896 flow [2024-06-21 19:25:47,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:47,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:47,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:47,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-21 19:25:47,289 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:47,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:47,290 INFO L85 PathProgramCache]: Analyzing trace with hash -606909131, now seen corresponding path program 19 times [2024-06-21 19:25:47,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:47,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493993986] [2024-06-21 19:25:47,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:47,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:47,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:49,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:49,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:49,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493993986] [2024-06-21 19:25:49,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493993986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:49,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:49,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 19:25:49,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443258535] [2024-06-21 19:25:49,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:49,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 19:25:49,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:49,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 19:25:49,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-21 19:25:50,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:50,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 549 transitions, 6896 flow. Second operand has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:50,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:50,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:50,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:51,110 INFO L124 PetriNetUnfolderBase]: 1420/2535 cut-off events. [2024-06-21 19:25:51,110 INFO L125 PetriNetUnfolderBase]: For 370878/370878 co-relation queries the response was YES. [2024-06-21 19:25:51,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17213 conditions, 2535 events. 1420/2535 cut-off events. For 370878/370878 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 16247 event pairs, 264 based on Foata normal form. 2/2535 useless extension candidates. Maximal degree in co-relation 16965. Up to 2436 conditions per place. [2024-06-21 19:25:51,180 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 529 selfloop transitions, 36 changer transitions 0/567 dead transitions. [2024-06-21 19:25:51,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 567 transitions, 8130 flow [2024-06-21 19:25:51,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:25:51,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:25:51,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 127 transitions. [2024-06-21 19:25:51,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3724340175953079 [2024-06-21 19:25:51,181 INFO L175 Difference]: Start difference. First operand has 600 places, 549 transitions, 6896 flow. Second operand 11 states and 127 transitions. [2024-06-21 19:25:51,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 567 transitions, 8130 flow [2024-06-21 19:25:53,473 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 567 transitions, 8007 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 19:25:53,499 INFO L231 Difference]: Finished difference. Result has 605 places, 550 transitions, 6909 flow [2024-06-21 19:25:53,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6773, PETRI_DIFFERENCE_MINUEND_PLACES=594, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6909, PETRI_PLACES=605, PETRI_TRANSITIONS=550} [2024-06-21 19:25:53,499 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 575 predicate places. [2024-06-21 19:25:53,499 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 550 transitions, 6909 flow [2024-06-21 19:25:53,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 7.5) internal successors, (75), 10 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:53,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:53,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:53,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-21 19:25:53,500 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:53,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:53,500 INFO L85 PathProgramCache]: Analyzing trace with hash 270033604, now seen corresponding path program 43 times [2024-06-21 19:25:53,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:53,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392491323] [2024-06-21 19:25:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:53,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:53,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:25:55,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:25:55,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:25:55,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392491323] [2024-06-21 19:25:55,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392491323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:25:55,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:25:55,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:25:55,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800092230] [2024-06-21 19:25:55,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:25:55,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:25:55,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:25:55,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:25:55,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:25:55,928 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:25:55,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 550 transitions, 6909 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:55,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:25:55,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:25:55,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:25:57,065 INFO L124 PetriNetUnfolderBase]: 1424/2543 cut-off events. [2024-06-21 19:25:57,065 INFO L125 PetriNetUnfolderBase]: For 375563/375563 co-relation queries the response was YES. [2024-06-21 19:25:57,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17259 conditions, 2543 events. 1424/2543 cut-off events. For 375563/375563 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 16312 event pairs, 282 based on Foata normal form. 2/2543 useless extension candidates. Maximal degree in co-relation 17010. Up to 2423 conditions per place. [2024-06-21 19:25:57,102 INFO L140 encePairwiseOnDemand]: 20/31 looper letters, 525 selfloop transitions, 41 changer transitions 0/568 dead transitions. [2024-06-21 19:25:57,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 614 places, 568 transitions, 8499 flow [2024-06-21 19:25:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 19:25:57,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 19:25:57,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 124 transitions. [2024-06-21 19:25:57,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-21 19:25:57,103 INFO L175 Difference]: Start difference. First operand has 605 places, 550 transitions, 6909 flow. Second operand 10 states and 124 transitions. [2024-06-21 19:25:57,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 614 places, 568 transitions, 8499 flow [2024-06-21 19:25:59,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 568 transitions, 8348 flow, removed 28 selfloop flow, removed 10 redundant places. [2024-06-21 19:25:59,454 INFO L231 Difference]: Finished difference. Result has 605 places, 551 transitions, 6888 flow [2024-06-21 19:25:59,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6758, PETRI_DIFFERENCE_MINUEND_PLACES=595, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=550, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6888, PETRI_PLACES=605, PETRI_TRANSITIONS=551} [2024-06-21 19:25:59,455 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 575 predicate places. [2024-06-21 19:25:59,455 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 551 transitions, 6888 flow [2024-06-21 19:25:59,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:25:59,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:25:59,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:25:59,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-21 19:25:59,455 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:25:59,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:25:59,456 INFO L85 PathProgramCache]: Analyzing trace with hash 270181474, now seen corresponding path program 44 times [2024-06-21 19:25:59,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:25:59,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736248069] [2024-06-21 19:25:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:25:59,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:25:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:02,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:02,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:02,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736248069] [2024-06-21 19:26:02,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736248069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:02,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:02,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:02,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963567708] [2024-06-21 19:26:02,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:02,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:02,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:02,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:02,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:03,046 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:03,047 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 551 transitions, 6888 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) [2024-06-21 19:26:03,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:03,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:03,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:04,152 INFO L124 PetriNetUnfolderBase]: 1431/2556 cut-off events. [2024-06-21 19:26:04,152 INFO L125 PetriNetUnfolderBase]: For 379039/379039 co-relation queries the response was YES. [2024-06-21 19:26:04,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17307 conditions, 2556 events. 1431/2556 cut-off events. For 379039/379039 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 16436 event pairs, 284 based on Foata normal form. 2/2556 useless extension candidates. Maximal degree in co-relation 17058. Up to 2456 conditions per place. [2024-06-21 19:26:04,196 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 524 selfloop transitions, 45 changer transitions 0/571 dead transitions. [2024-06-21 19:26:04,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 571 transitions, 8161 flow [2024-06-21 19:26:04,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:04,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:04,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 138 transitions. [2024-06-21 19:26:04,198 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3709677419354839 [2024-06-21 19:26:04,198 INFO L175 Difference]: Start difference. First operand has 605 places, 551 transitions, 6888 flow. Second operand 12 states and 138 transitions. [2024-06-21 19:26:04,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 571 transitions, 8161 flow [2024-06-21 19:26:06,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 571 transitions, 7624 flow, removed 46 selfloop flow, removed 18 redundant places. [2024-06-21 19:26:06,673 INFO L231 Difference]: Finished difference. Result has 600 places, 555 transitions, 6541 flow [2024-06-21 19:26:06,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6379, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6541, PETRI_PLACES=600, PETRI_TRANSITIONS=555} [2024-06-21 19:26:06,674 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 570 predicate places. [2024-06-21 19:26:06,674 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 555 transitions, 6541 flow [2024-06-21 19:26:06,674 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) [2024-06-21 19:26:06,674 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:06,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:06,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-21 19:26:06,675 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:06,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:06,675 INFO L85 PathProgramCache]: Analyzing trace with hash 477117355, now seen corresponding path program 20 times [2024-06-21 19:26:06,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:06,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998438805] [2024-06-21 19:26:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:06,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:08,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:08,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998438805] [2024-06-21 19:26:08,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1998438805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:08,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:08,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:26:08,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607926244] [2024-06-21 19:26:08,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:08,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:26:08,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:08,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:26:08,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:26:08,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:08,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 555 transitions, 6541 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:08,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:08,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:08,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:09,580 INFO L124 PetriNetUnfolderBase]: 1428/2551 cut-off events. [2024-06-21 19:26:09,580 INFO L125 PetriNetUnfolderBase]: For 346875/346875 co-relation queries the response was YES. [2024-06-21 19:26:09,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15881 conditions, 2551 events. 1428/2551 cut-off events. For 346875/346875 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 16411 event pairs, 261 based on Foata normal form. 2/2551 useless extension candidates. Maximal degree in co-relation 15640. Up to 2452 conditions per place. [2024-06-21 19:26:09,614 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 535 selfloop transitions, 35 changer transitions 0/572 dead transitions. [2024-06-21 19:26:09,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 610 places, 572 transitions, 7725 flow [2024-06-21 19:26:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:26:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:26:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 126 transitions. [2024-06-21 19:26:09,615 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36950146627565983 [2024-06-21 19:26:09,615 INFO L175 Difference]: Start difference. First operand has 600 places, 555 transitions, 6541 flow. Second operand 11 states and 126 transitions. [2024-06-21 19:26:09,615 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 610 places, 572 transitions, 7725 flow [2024-06-21 19:26:11,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 601 places, 572 transitions, 7601 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 19:26:11,761 INFO L231 Difference]: Finished difference. Result has 602 places, 555 transitions, 6491 flow [2024-06-21 19:26:11,761 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6417, PETRI_DIFFERENCE_MINUEND_PLACES=591, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6491, PETRI_PLACES=602, PETRI_TRANSITIONS=555} [2024-06-21 19:26:11,761 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 572 predicate places. [2024-06-21 19:26:11,761 INFO L495 AbstractCegarLoop]: Abstraction has has 602 places, 555 transitions, 6491 flow [2024-06-21 19:26:11,761 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:11,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:11,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:11,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-21 19:26:11,763 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:11,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:11,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1881128167, now seen corresponding path program 26 times [2024-06-21 19:26:11,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:11,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258045394] [2024-06-21 19:26:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:11,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:14,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:14,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258045394] [2024-06-21 19:26:14,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258045394] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:14,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:14,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:26:14,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860037585] [2024-06-21 19:26:14,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:14,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:26:14,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:14,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:26:14,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:26:14,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:14,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 602 places, 555 transitions, 6491 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:14,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:14,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:14,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:15,947 INFO L124 PetriNetUnfolderBase]: 1442/2575 cut-off events. [2024-06-21 19:26:15,947 INFO L125 PetriNetUnfolderBase]: For 316187/316187 co-relation queries the response was YES. [2024-06-21 19:26:15,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15536 conditions, 2575 events. 1442/2575 cut-off events. For 316187/316187 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 16612 event pairs, 258 based on Foata normal form. 2/2575 useless extension candidates. Maximal degree in co-relation 15294. Up to 2369 conditions per place. [2024-06-21 19:26:16,068 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 520 selfloop transitions, 60 changer transitions 0/582 dead transitions. [2024-06-21 19:26:16,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 582 transitions, 8129 flow [2024-06-21 19:26:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:26:16,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:26:16,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 143 transitions. [2024-06-21 19:26:16,070 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41935483870967744 [2024-06-21 19:26:16,070 INFO L175 Difference]: Start difference. First operand has 602 places, 555 transitions, 6491 flow. Second operand 11 states and 143 transitions. [2024-06-21 19:26:16,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 582 transitions, 8129 flow [2024-06-21 19:26:17,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 602 places, 582 transitions, 7947 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-21 19:26:17,626 INFO L231 Difference]: Finished difference. Result has 605 places, 561 transitions, 6518 flow [2024-06-21 19:26:17,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6309, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6518, PETRI_PLACES=605, PETRI_TRANSITIONS=561} [2024-06-21 19:26:17,627 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 575 predicate places. [2024-06-21 19:26:17,627 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 561 transitions, 6518 flow [2024-06-21 19:26:17,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:17,633 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:17,633 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:17,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-21 19:26:17,633 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:17,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:17,634 INFO L85 PathProgramCache]: Analyzing trace with hash 469483264, now seen corresponding path program 45 times [2024-06-21 19:26:17,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:17,634 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904281981] [2024-06-21 19:26:17,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:17,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:17,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:21,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:21,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904281981] [2024-06-21 19:26:21,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904281981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:21,422 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:21,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:21,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405258187] [2024-06-21 19:26:21,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:21,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:21,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:21,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:21,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:21,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 561 transitions, 6518 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) [2024-06-21 19:26:21,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:21,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:21,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:22,766 INFO L124 PetriNetUnfolderBase]: 1446/2583 cut-off events. [2024-06-21 19:26:22,766 INFO L125 PetriNetUnfolderBase]: For 318766/318766 co-relation queries the response was YES. [2024-06-21 19:26:22,803 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15550 conditions, 2583 events. 1446/2583 cut-off events. For 318766/318766 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 16668 event pairs, 284 based on Foata normal form. 2/2583 useless extension candidates. Maximal degree in co-relation 15307. Up to 2510 conditions per place. [2024-06-21 19:26:22,810 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 541 selfloop transitions, 34 changer transitions 0/577 dead transitions. [2024-06-21 19:26:22,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 577 transitions, 7731 flow [2024-06-21 19:26:22,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:22,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:22,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 133 transitions. [2024-06-21 19:26:22,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3575268817204301 [2024-06-21 19:26:22,812 INFO L175 Difference]: Start difference. First operand has 605 places, 561 transitions, 6518 flow. Second operand 12 states and 133 transitions. [2024-06-21 19:26:22,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 577 transitions, 7731 flow [2024-06-21 19:26:24,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 608 places, 577 transitions, 7583 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-21 19:26:24,757 INFO L231 Difference]: Finished difference. Result has 609 places, 562 transitions, 6471 flow [2024-06-21 19:26:24,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6370, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=561, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6471, PETRI_PLACES=609, PETRI_TRANSITIONS=562} [2024-06-21 19:26:24,758 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 579 predicate places. [2024-06-21 19:26:24,758 INFO L495 AbstractCegarLoop]: Abstraction has has 609 places, 562 transitions, 6471 flow [2024-06-21 19:26:24,758 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) [2024-06-21 19:26:24,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:24,758 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:24,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-21 19:26:24,758 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:24,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:24,759 INFO L85 PathProgramCache]: Analyzing trace with hash 469488999, now seen corresponding path program 27 times [2024-06-21 19:26:24,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:24,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099682456] [2024-06-21 19:26:24,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:24,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:27,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:27,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099682456] [2024-06-21 19:26:27,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099682456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:27,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:27,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:27,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613976827] [2024-06-21 19:26:27,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:27,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:27,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:27,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:27,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:27,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:27,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 609 places, 562 transitions, 6471 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) [2024-06-21 19:26:27,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:27,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:27,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:29,072 INFO L124 PetriNetUnfolderBase]: 1482/2643 cut-off events. [2024-06-21 19:26:29,072 INFO L125 PetriNetUnfolderBase]: For 322212/322212 co-relation queries the response was YES. [2024-06-21 19:26:29,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15720 conditions, 2643 events. 1482/2643 cut-off events. For 322212/322212 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 17107 event pairs, 264 based on Foata normal form. 2/2643 useless extension candidates. Maximal degree in co-relation 15476. Up to 2495 conditions per place. [2024-06-21 19:26:29,117 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 543 selfloop transitions, 49 changer transitions 0/594 dead transitions. [2024-06-21 19:26:29,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 620 places, 594 transitions, 7861 flow [2024-06-21 19:26:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:29,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:29,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 144 transitions. [2024-06-21 19:26:29,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-06-21 19:26:29,118 INFO L175 Difference]: Start difference. First operand has 609 places, 562 transitions, 6471 flow. Second operand 12 states and 144 transitions. [2024-06-21 19:26:29,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 620 places, 594 transitions, 7861 flow [2024-06-21 19:26:31,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 610 places, 594 transitions, 7771 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-21 19:26:31,365 INFO L231 Difference]: Finished difference. Result has 614 places, 573 transitions, 6662 flow [2024-06-21 19:26:31,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6381, PETRI_DIFFERENCE_MINUEND_PLACES=599, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6662, PETRI_PLACES=614, PETRI_TRANSITIONS=573} [2024-06-21 19:26:31,366 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 584 predicate places. [2024-06-21 19:26:31,366 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 573 transitions, 6662 flow [2024-06-21 19:26:31,366 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) [2024-06-21 19:26:31,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:31,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:31,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-21 19:26:31,366 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:31,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:31,367 INFO L85 PathProgramCache]: Analyzing trace with hash 270037324, now seen corresponding path program 46 times [2024-06-21 19:26:31,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:31,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844725491] [2024-06-21 19:26:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:31,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:33,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:33,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:33,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844725491] [2024-06-21 19:26:33,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844725491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:33,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:33,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:26:33,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229701885] [2024-06-21 19:26:33,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:33,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:26:33,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:33,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:26:33,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:26:33,278 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:33,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 573 transitions, 6662 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:33,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:33,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:33,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:34,370 INFO L124 PetriNetUnfolderBase]: 1486/2651 cut-off events. [2024-06-21 19:26:34,370 INFO L125 PetriNetUnfolderBase]: For 326239/326239 co-relation queries the response was YES. [2024-06-21 19:26:34,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15891 conditions, 2651 events. 1486/2651 cut-off events. For 326239/326239 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 17196 event pairs, 290 based on Foata normal form. 2/2651 useless extension candidates. Maximal degree in co-relation 15643. Up to 2551 conditions per place. [2024-06-21 19:26:34,417 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 542 selfloop transitions, 48 changer transitions 0/592 dead transitions. [2024-06-21 19:26:34,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 624 places, 592 transitions, 7946 flow [2024-06-21 19:26:34,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:26:34,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:26:34,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 131 transitions. [2024-06-21 19:26:34,418 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3841642228739003 [2024-06-21 19:26:34,419 INFO L175 Difference]: Start difference. First operand has 614 places, 573 transitions, 6662 flow. Second operand 11 states and 131 transitions. [2024-06-21 19:26:34,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 624 places, 592 transitions, 7946 flow [2024-06-21 19:26:36,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 617 places, 592 transitions, 7849 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 19:26:36,553 INFO L231 Difference]: Finished difference. Result has 619 places, 577 transitions, 6747 flow [2024-06-21 19:26:36,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6565, PETRI_DIFFERENCE_MINUEND_PLACES=607, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6747, PETRI_PLACES=619, PETRI_TRANSITIONS=577} [2024-06-21 19:26:36,553 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 589 predicate places. [2024-06-21 19:26:36,553 INFO L495 AbstractCegarLoop]: Abstraction has has 619 places, 577 transitions, 6747 flow [2024-06-21 19:26:36,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:36,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:36,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:36,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-21 19:26:36,554 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:36,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:36,555 INFO L85 PathProgramCache]: Analyzing trace with hash 275543854, now seen corresponding path program 47 times [2024-06-21 19:26:36,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:36,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461664601] [2024-06-21 19:26:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:36,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:39,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:39,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:39,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461664601] [2024-06-21 19:26:39,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461664601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:39,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:39,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:39,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229743639] [2024-06-21 19:26:39,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:39,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:39,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:39,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:39,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:40,154 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:40,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 619 places, 577 transitions, 6747 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) [2024-06-21 19:26:40,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:40,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:40,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:41,269 INFO L124 PetriNetUnfolderBase]: 1483/2646 cut-off events. [2024-06-21 19:26:41,269 INFO L125 PetriNetUnfolderBase]: For 293804/293804 co-relation queries the response was YES. [2024-06-21 19:26:41,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15502 conditions, 2646 events. 1483/2646 cut-off events. For 293804/293804 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 17172 event pairs, 289 based on Foata normal form. 2/2646 useless extension candidates. Maximal degree in co-relation 15253. Up to 2546 conditions per place. [2024-06-21 19:26:41,315 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 544 selfloop transitions, 46 changer transitions 0/592 dead transitions. [2024-06-21 19:26:41,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 630 places, 592 transitions, 7963 flow [2024-06-21 19:26:41,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:26:41,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:26:41,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 139 transitions. [2024-06-21 19:26:41,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3736559139784946 [2024-06-21 19:26:41,316 INFO L175 Difference]: Start difference. First operand has 619 places, 577 transitions, 6747 flow. Second operand 12 states and 139 transitions. [2024-06-21 19:26:41,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 630 places, 592 transitions, 7963 flow [2024-06-21 19:26:43,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 623 places, 592 transitions, 7820 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 19:26:43,551 INFO L231 Difference]: Finished difference. Result has 624 places, 577 transitions, 6700 flow [2024-06-21 19:26:43,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6604, PETRI_DIFFERENCE_MINUEND_PLACES=612, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6700, PETRI_PLACES=624, PETRI_TRANSITIONS=577} [2024-06-21 19:26:43,552 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 594 predicate places. [2024-06-21 19:26:43,552 INFO L495 AbstractCegarLoop]: Abstraction has has 624 places, 577 transitions, 6700 flow [2024-06-21 19:26:43,552 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) [2024-06-21 19:26:43,552 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:43,552 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:43,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-21 19:26:43,552 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:43,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:43,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1886490547, now seen corresponding path program 28 times [2024-06-21 19:26:43,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:43,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373973536] [2024-06-21 19:26:43,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:43,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:46,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:46,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373973536] [2024-06-21 19:26:46,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373973536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:46,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:46,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 19:26:46,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327568508] [2024-06-21 19:26:46,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:46,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 19:26:46,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 19:26:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-21 19:26:46,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:46,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 624 places, 577 transitions, 6700 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:46,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:46,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:46,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:47,710 INFO L124 PetriNetUnfolderBase]: 1479/2640 cut-off events. [2024-06-21 19:26:47,710 INFO L125 PetriNetUnfolderBase]: For 259940/259940 co-relation queries the response was YES. [2024-06-21 19:26:47,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14973 conditions, 2640 events. 1479/2640 cut-off events. For 259940/259940 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 17130 event pairs, 258 based on Foata normal form. 2/2640 useless extension candidates. Maximal degree in co-relation 14723. Up to 2401 conditions per place. [2024-06-21 19:26:47,754 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 530 selfloop transitions, 67 changer transitions 0/599 dead transitions. [2024-06-21 19:26:47,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 634 places, 599 transitions, 7972 flow [2024-06-21 19:26:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-21 19:26:47,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-21 19:26:47,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 146 transitions. [2024-06-21 19:26:47,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281524926686217 [2024-06-21 19:26:47,755 INFO L175 Difference]: Start difference. First operand has 624 places, 577 transitions, 6700 flow. Second operand 11 states and 146 transitions. [2024-06-21 19:26:47,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 634 places, 599 transitions, 7972 flow [2024-06-21 19:26:49,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 599 transitions, 7846 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-21 19:26:49,750 INFO L231 Difference]: Finished difference. Result has 626 places, 577 transitions, 6713 flow [2024-06-21 19:26:49,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6574, PETRI_DIFFERENCE_MINUEND_PLACES=615, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6713, PETRI_PLACES=626, PETRI_TRANSITIONS=577} [2024-06-21 19:26:49,751 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 596 predicate places. [2024-06-21 19:26:49,751 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 577 transitions, 6713 flow [2024-06-21 19:26:49,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 19:26:49,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:49,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:49,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-21 19:26:49,752 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:49,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:49,753 INFO L85 PathProgramCache]: Analyzing trace with hash -128153116, now seen corresponding path program 1 times [2024-06-21 19:26:49,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:49,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399543565] [2024-06-21 19:26:49,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:49,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:52,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:52,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:52,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399543565] [2024-06-21 19:26:52,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399543565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:52,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:52,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:52,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684975012] [2024-06-21 19:26:52,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:52,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:52,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:52,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:52,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:52,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:52,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 577 transitions, 6713 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) [2024-06-21 19:26:52,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:52,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:52,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:26:53,763 INFO L124 PetriNetUnfolderBase]: 1520/2727 cut-off events. [2024-06-21 19:26:53,764 INFO L125 PetriNetUnfolderBase]: For 550598/550598 co-relation queries the response was YES. [2024-06-21 19:26:53,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17287 conditions, 2727 events. 1520/2727 cut-off events. For 550598/550598 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 17704 event pairs, 446 based on Foata normal form. 8/2733 useless extension candidates. Maximal degree in co-relation 17037. Up to 2453 conditions per place. [2024-06-21 19:26:53,811 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 567 selfloop transitions, 26 changer transitions 14/609 dead transitions. [2024-06-21 19:26:53,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 639 places, 609 transitions, 8461 flow [2024-06-21 19:26:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:26:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:26:53,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 162 transitions. [2024-06-21 19:26:53,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37327188940092165 [2024-06-21 19:26:53,813 INFO L175 Difference]: Start difference. First operand has 626 places, 577 transitions, 6713 flow. Second operand 14 states and 162 transitions. [2024-06-21 19:26:53,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 639 places, 609 transitions, 8461 flow [2024-06-21 19:26:56,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 627 places, 609 transitions, 8155 flow, removed 11 selfloop flow, removed 12 redundant places. [2024-06-21 19:26:56,836 INFO L231 Difference]: Finished difference. Result has 628 places, 573 transitions, 6421 flow [2024-06-21 19:26:56,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6407, PETRI_DIFFERENCE_MINUEND_PLACES=614, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=577, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6421, PETRI_PLACES=628, PETRI_TRANSITIONS=573} [2024-06-21 19:26:56,837 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 598 predicate places. [2024-06-21 19:26:56,837 INFO L495 AbstractCegarLoop]: Abstraction has has 628 places, 573 transitions, 6421 flow [2024-06-21 19:26:56,837 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) [2024-06-21 19:26:56,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:26:56,837 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:26:56,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-21 19:26:56,838 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:26:56,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:26:56,839 INFO L85 PathProgramCache]: Analyzing trace with hash -69945346, now seen corresponding path program 2 times [2024-06-21 19:26:56,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:26:56,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392470942] [2024-06-21 19:26:56,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:26:56,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:26:56,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:26:59,170 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:26:59,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:26:59,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392470942] [2024-06-21 19:26:59,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392470942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:26:59,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:26:59,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:26:59,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752162661] [2024-06-21 19:26:59,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:26:59,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:26:59,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:26:59,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:26:59,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:26:59,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:26:59,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 628 places, 573 transitions, 6421 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) [2024-06-21 19:26:59,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:26:59,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:26:59,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:00,594 INFO L124 PetriNetUnfolderBase]: 1539/2766 cut-off events. [2024-06-21 19:27:00,594 INFO L125 PetriNetUnfolderBase]: For 736436/736436 co-relation queries the response was YES. [2024-06-21 19:27:00,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19115 conditions, 2766 events. 1539/2766 cut-off events. For 736436/736436 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 17932 event pairs, 459 based on Foata normal form. 8/2772 useless extension candidates. Maximal degree in co-relation 18866. Up to 2580 conditions per place. [2024-06-21 19:27:00,765 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 568 selfloop transitions, 28 changer transitions 7/605 dead transitions. [2024-06-21 19:27:00,766 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 605 transitions, 8181 flow [2024-06-21 19:27:00,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-21 19:27:00,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-21 19:27:00,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 166 transitions. [2024-06-21 19:27:00,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35698924731182796 [2024-06-21 19:27:00,766 INFO L175 Difference]: Start difference. First operand has 628 places, 573 transitions, 6421 flow. Second operand 15 states and 166 transitions. [2024-06-21 19:27:00,767 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 605 transitions, 8181 flow [2024-06-21 19:27:04,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 625 places, 605 transitions, 8126 flow, removed 8 selfloop flow, removed 12 redundant places. [2024-06-21 19:27:04,475 INFO L231 Difference]: Finished difference. Result has 626 places, 573 transitions, 6433 flow [2024-06-21 19:27:04,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6374, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=6433, PETRI_PLACES=626, PETRI_TRANSITIONS=573} [2024-06-21 19:27:04,475 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 596 predicate places. [2024-06-21 19:27:04,475 INFO L495 AbstractCegarLoop]: Abstraction has has 626 places, 573 transitions, 6433 flow [2024-06-21 19:27:04,475 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) [2024-06-21 19:27:04,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:04,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:04,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-21 19:27:04,476 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:27:04,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:04,477 INFO L85 PathProgramCache]: Analyzing trace with hash -69940696, now seen corresponding path program 3 times [2024-06-21 19:27:04,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:04,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383948509] [2024-06-21 19:27:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:04,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:04,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:06,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:06,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:06,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383948509] [2024-06-21 19:27:06,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383948509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:06,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:06,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:27:06,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899931365] [2024-06-21 19:27:06,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:06,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:27:06,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:06,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:27:06,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:27:06,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:27:06,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 626 places, 573 transitions, 6433 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) [2024-06-21 19:27:06,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:06,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:27:06,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:07,715 INFO L124 PetriNetUnfolderBase]: 1508/2705 cut-off events. [2024-06-21 19:27:07,715 INFO L125 PetriNetUnfolderBase]: For 579757/579757 co-relation queries the response was YES. [2024-06-21 19:27:07,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16935 conditions, 2705 events. 1508/2705 cut-off events. For 579757/579757 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 17506 event pairs, 450 based on Foata normal form. 10/2713 useless extension candidates. Maximal degree in co-relation 16688. Up to 2580 conditions per place. [2024-06-21 19:27:07,761 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 558 selfloop transitions, 25 changer transitions 13/598 dead transitions. [2024-06-21 19:27:07,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 637 places, 598 transitions, 7733 flow [2024-06-21 19:27:07,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:27:07,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:27:07,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 154 transitions. [2024-06-21 19:27:07,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3548387096774194 [2024-06-21 19:27:07,762 INFO L175 Difference]: Start difference. First operand has 626 places, 573 transitions, 6433 flow. Second operand 14 states and 154 transitions. [2024-06-21 19:27:07,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 637 places, 598 transitions, 7733 flow [2024-06-21 19:27:10,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 624 places, 598 transitions, 7674 flow, removed 2 selfloop flow, removed 13 redundant places. [2024-06-21 19:27:10,608 INFO L231 Difference]: Finished difference. Result has 625 places, 569 transitions, 6384 flow [2024-06-21 19:27:10,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6374, PETRI_DIFFERENCE_MINUEND_PLACES=611, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=548, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6384, PETRI_PLACES=625, PETRI_TRANSITIONS=569} [2024-06-21 19:27:10,608 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 595 predicate places. [2024-06-21 19:27:10,609 INFO L495 AbstractCegarLoop]: Abstraction has has 625 places, 569 transitions, 6384 flow [2024-06-21 19:27:10,609 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) [2024-06-21 19:27:10,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:10,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:10,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-21 19:27:10,609 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:27:10,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash -70060666, now seen corresponding path program 4 times [2024-06-21 19:27:10,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:10,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62982218] [2024-06-21 19:27:10,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:10,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:10,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:13,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:13,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62982218] [2024-06-21 19:27:13,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62982218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:13,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:13,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:27:13,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670438049] [2024-06-21 19:27:13,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:13,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:27:13,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:13,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:27:13,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:27:13,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:27:13,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 625 places, 569 transitions, 6384 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) [2024-06-21 19:27:13,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:13,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:27:13,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:14,505 INFO L124 PetriNetUnfolderBase]: 1495/2682 cut-off events. [2024-06-21 19:27:14,505 INFO L125 PetriNetUnfolderBase]: For 538070/538070 co-relation queries the response was YES. [2024-06-21 19:27:14,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16788 conditions, 2682 events. 1495/2682 cut-off events. For 538070/538070 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 17369 event pairs, 442 based on Foata normal form. 8/2688 useless extension candidates. Maximal degree in co-relation 16542. Up to 2562 conditions per place. [2024-06-21 19:27:14,559 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 553 selfloop transitions, 22 changer transitions 16/593 dead transitions. [2024-06-21 19:27:14,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 632 places, 593 transitions, 7658 flow [2024-06-21 19:27:14,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-21 19:27:14,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-21 19:27:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 151 transitions. [2024-06-21 19:27:14,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.347926267281106 [2024-06-21 19:27:14,560 INFO L175 Difference]: Start difference. First operand has 625 places, 569 transitions, 6384 flow. Second operand 14 states and 151 transitions. [2024-06-21 19:27:14,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 632 places, 593 transitions, 7658 flow [2024-06-21 19:27:17,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 621 places, 593 transitions, 7606 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 19:27:17,238 INFO L231 Difference]: Finished difference. Result has 622 places, 564 transitions, 6325 flow [2024-06-21 19:27:17,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6332, PETRI_DIFFERENCE_MINUEND_PLACES=608, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=6325, PETRI_PLACES=622, PETRI_TRANSITIONS=564} [2024-06-21 19:27:17,239 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 592 predicate places. [2024-06-21 19:27:17,239 INFO L495 AbstractCegarLoop]: Abstraction has has 622 places, 564 transitions, 6325 flow [2024-06-21 19:27:17,239 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) [2024-06-21 19:27:17,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:17,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:17,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-21 19:27:17,240 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:27:17,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:17,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1677461882, now seen corresponding path program 5 times [2024-06-21 19:27:17,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:17,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184612302] [2024-06-21 19:27:17,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:17,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:17,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:20,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:20,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:20,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184612302] [2024-06-21 19:27:20,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184612302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:20,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:20,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:27:20,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863601024] [2024-06-21 19:27:20,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:20,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:27:20,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:20,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:27:20,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:27:20,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:27:20,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 622 places, 564 transitions, 6325 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) [2024-06-21 19:27:20,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:20,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:27:20,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:21,658 INFO L124 PetriNetUnfolderBase]: 1492/2674 cut-off events. [2024-06-21 19:27:21,658 INFO L125 PetriNetUnfolderBase]: For 573685/573685 co-relation queries the response was YES. [2024-06-21 19:27:21,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16759 conditions, 2674 events. 1492/2674 cut-off events. For 573685/573685 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 17223 event pairs, 448 based on Foata normal form. 10/2682 useless extension candidates. Maximal degree in co-relation 16513. Up to 2562 conditions per place. [2024-06-21 19:27:21,704 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 552 selfloop transitions, 23 changer transitions 11/588 dead transitions. [2024-06-21 19:27:21,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 626 places, 588 transitions, 7621 flow [2024-06-21 19:27:21,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:27:21,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:27:21,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 142 transitions. [2024-06-21 19:27:21,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523573200992556 [2024-06-21 19:27:21,725 INFO L175 Difference]: Start difference. First operand has 622 places, 564 transitions, 6325 flow. Second operand 13 states and 142 transitions. [2024-06-21 19:27:21,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 626 places, 588 transitions, 7621 flow [2024-06-21 19:27:24,156 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 613 places, 588 transitions, 7563 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-21 19:27:24,162 INFO L231 Difference]: Finished difference. Result has 614 places, 563 transitions, 6310 flow [2024-06-21 19:27:24,162 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6271, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6310, PETRI_PLACES=614, PETRI_TRANSITIONS=563} [2024-06-21 19:27:24,162 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 584 predicate places. [2024-06-21 19:27:24,162 INFO L495 AbstractCegarLoop]: Abstraction has has 614 places, 563 transitions, 6310 flow [2024-06-21 19:27:24,162 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) [2024-06-21 19:27:24,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:24,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:24,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-21 19:27:24,163 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:27:24,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:24,163 INFO L85 PathProgramCache]: Analyzing trace with hash -1672997882, now seen corresponding path program 6 times [2024-06-21 19:27:24,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:24,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214011930] [2024-06-21 19:27:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:24,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:24,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:26,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:26,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:26,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214011930] [2024-06-21 19:27:26,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214011930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:26,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:26,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:27:26,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665536202] [2024-06-21 19:27:26,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:26,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:27:26,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:26,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:27:26,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:27:26,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:27:26,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 614 places, 563 transitions, 6310 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) [2024-06-21 19:27:26,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:26,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:27:26,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:27,913 INFO L124 PetriNetUnfolderBase]: 1524/2746 cut-off events. [2024-06-21 19:27:27,914 INFO L125 PetriNetUnfolderBase]: For 799248/799248 co-relation queries the response was YES. [2024-06-21 19:27:27,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19992 conditions, 2746 events. 1524/2746 cut-off events. For 799248/799248 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 17751 event pairs, 470 based on Foata normal form. 8/2752 useless extension candidates. Maximal degree in co-relation 19749. Up to 2515 conditions per place. [2024-06-21 19:27:27,960 INFO L140 encePairwiseOnDemand]: 19/31 looper letters, 558 selfloop transitions, 18 changer transitions 10/588 dead transitions. [2024-06-21 19:27:27,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 623 places, 588 transitions, 8016 flow [2024-06-21 19:27:27,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:27:27,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:27:27,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 135 transitions. [2024-06-21 19:27:27,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3629032258064516 [2024-06-21 19:27:27,961 INFO L175 Difference]: Start difference. First operand has 614 places, 563 transitions, 6310 flow. Second operand 12 states and 135 transitions. [2024-06-21 19:27:27,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 623 places, 588 transitions, 8016 flow [2024-06-21 19:27:30,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 612 places, 588 transitions, 7966 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 19:27:30,965 INFO L231 Difference]: Finished difference. Result has 613 places, 558 transitions, 6252 flow [2024-06-21 19:27:30,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6262, PETRI_DIFFERENCE_MINUEND_PLACES=601, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=545, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6252, PETRI_PLACES=613, PETRI_TRANSITIONS=558} [2024-06-21 19:27:30,965 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 583 predicate places. [2024-06-21 19:27:30,965 INFO L495 AbstractCegarLoop]: Abstraction has has 613 places, 558 transitions, 6252 flow [2024-06-21 19:27:30,965 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) [2024-06-21 19:27:30,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:30,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:30,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-21 19:27:30,966 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:27:30,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:30,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1677581852, now seen corresponding path program 7 times [2024-06-21 19:27:30,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:30,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242256078] [2024-06-21 19:27:30,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:30,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:33,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:33,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:33,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242256078] [2024-06-21 19:27:33,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242256078] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:33,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:33,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:27:33,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237711782] [2024-06-21 19:27:33,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:33,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:27:33,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:33,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:27:33,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:27:33,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:27:33,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 613 places, 558 transitions, 6252 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) [2024-06-21 19:27:33,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:33,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:27:33,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:34,795 INFO L124 PetriNetUnfolderBase]: 1489/2677 cut-off events. [2024-06-21 19:27:34,795 INFO L125 PetriNetUnfolderBase]: For 663663/663663 co-relation queries the response was YES. [2024-06-21 19:27:34,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18210 conditions, 2677 events. 1489/2677 cut-off events. For 663663/663663 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 17225 event pairs, 448 based on Foata normal form. 8/2683 useless extension candidates. Maximal degree in co-relation 17967. Up to 2499 conditions per place. [2024-06-21 19:27:34,843 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 554 selfloop transitions, 18 changer transitions 11/585 dead transitions. [2024-06-21 19:27:34,843 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 621 places, 585 transitions, 7930 flow [2024-06-21 19:27:34,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:27:34,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:27:34,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 144 transitions. [2024-06-21 19:27:34,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3573200992555831 [2024-06-21 19:27:34,844 INFO L175 Difference]: Start difference. First operand has 613 places, 558 transitions, 6252 flow. Second operand 13 states and 144 transitions. [2024-06-21 19:27:34,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 621 places, 585 transitions, 7930 flow [2024-06-21 19:27:37,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 609 places, 585 transitions, 7887 flow, removed 6 selfloop flow, removed 12 redundant places. [2024-06-21 19:27:37,807 INFO L231 Difference]: Finished difference. Result has 610 places, 554 transitions, 6216 flow [2024-06-21 19:27:37,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6215, PETRI_DIFFERENCE_MINUEND_PLACES=597, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=558, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6216, PETRI_PLACES=610, PETRI_TRANSITIONS=554} [2024-06-21 19:27:37,808 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 580 predicate places. [2024-06-21 19:27:37,808 INFO L495 AbstractCegarLoop]: Abstraction has has 610 places, 554 transitions, 6216 flow [2024-06-21 19:27:37,808 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) [2024-06-21 19:27:37,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:37,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:37,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203 [2024-06-21 19:27:37,809 INFO L420 AbstractCegarLoop]: === Iteration 205 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:27:37,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:37,809 INFO L85 PathProgramCache]: Analyzing trace with hash 826385334, now seen corresponding path program 1 times [2024-06-21 19:27:37,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:37,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329352924] [2024-06-21 19:27:37,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:37,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:37,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:40,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:40,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:40,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329352924] [2024-06-21 19:27:40,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329352924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:40,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:40,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:27:40,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442096914] [2024-06-21 19:27:40,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:40,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:27:40,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:27:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:27:40,558 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:27:40,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 610 places, 554 transitions, 6216 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) [2024-06-21 19:27:40,559 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:40,559 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:27:40,559 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:41,688 INFO L124 PetriNetUnfolderBase]: 1479/2659 cut-off events. [2024-06-21 19:27:41,688 INFO L125 PetriNetUnfolderBase]: For 684044/684044 co-relation queries the response was YES. [2024-06-21 19:27:41,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17716 conditions, 2659 events. 1479/2659 cut-off events. For 684044/684044 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 17100 event pairs, 451 based on Foata normal form. 12/2669 useless extension candidates. Maximal degree in co-relation 17475. Up to 2553 conditions per place. [2024-06-21 19:27:41,733 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 547 selfloop transitions, 18 changer transitions 8/575 dead transitions. [2024-06-21 19:27:41,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 575 transitions, 7486 flow [2024-06-21 19:27:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:27:41,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:27:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 131 transitions. [2024-06-21 19:27:41,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3521505376344086 [2024-06-21 19:27:41,734 INFO L175 Difference]: Start difference. First operand has 610 places, 554 transitions, 6216 flow. Second operand 12 states and 131 transitions. [2024-06-21 19:27:41,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 575 transitions, 7486 flow [2024-06-21 19:27:44,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 575 transitions, 7448 flow, removed 3 selfloop flow, removed 12 redundant places. [2024-06-21 19:27:44,462 INFO L231 Difference]: Finished difference. Result has 605 places, 551 transitions, 6210 flow [2024-06-21 19:27:44,462 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6178, PETRI_DIFFERENCE_MINUEND_PLACES=593, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6210, PETRI_PLACES=605, PETRI_TRANSITIONS=551} [2024-06-21 19:27:44,463 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 575 predicate places. [2024-06-21 19:27:44,463 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 551 transitions, 6210 flow [2024-06-21 19:27:44,463 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) [2024-06-21 19:27:44,463 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:44,463 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:44,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204 [2024-06-21 19:27:44,463 INFO L420 AbstractCegarLoop]: === Iteration 206 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:27:44,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:44,464 INFO L85 PathProgramCache]: Analyzing trace with hash 826378390, now seen corresponding path program 8 times [2024-06-21 19:27:44,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:44,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054787775] [2024-06-21 19:27:44,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:44,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:44,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:47,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:47,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054787775] [2024-06-21 19:27:47,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054787775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:47,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:47,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:27:47,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122515264] [2024-06-21 19:27:47,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:47,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:27:47,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:47,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:27:47,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:27:47,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:27:47,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 551 transitions, 6210 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) [2024-06-21 19:27:47,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:47,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:27:47,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:48,960 INFO L124 PetriNetUnfolderBase]: 1441/2585 cut-off events. [2024-06-21 19:27:48,960 INFO L125 PetriNetUnfolderBase]: For 469418/469418 co-relation queries the response was YES. [2024-06-21 19:27:48,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15534 conditions, 2585 events. 1441/2585 cut-off events. For 469418/469418 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 16579 event pairs, 436 based on Foata normal form. 10/2593 useless extension candidates. Maximal degree in co-relation 15295. Up to 2494 conditions per place. [2024-06-21 19:27:49,001 INFO L140 encePairwiseOnDemand]: 18/31 looper letters, 545 selfloop transitions, 14 changer transitions 11/572 dead transitions. [2024-06-21 19:27:49,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 616 places, 572 transitions, 7446 flow [2024-06-21 19:27:49,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:27:49,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:27:49,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 135 transitions. [2024-06-21 19:27:49,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3349875930521092 [2024-06-21 19:27:49,002 INFO L175 Difference]: Start difference. First operand has 605 places, 551 transitions, 6210 flow. Second operand 13 states and 135 transitions. [2024-06-21 19:27:49,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 616 places, 572 transitions, 7446 flow [2024-06-21 19:27:50,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 604 places, 572 transitions, 7378 flow, removed 14 selfloop flow, removed 12 redundant places. [2024-06-21 19:27:50,735 INFO L231 Difference]: Finished difference. Result has 605 places, 548 transitions, 6141 flow [2024-06-21 19:27:50,735 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6142, PETRI_DIFFERENCE_MINUEND_PLACES=592, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6141, PETRI_PLACES=605, PETRI_TRANSITIONS=548} [2024-06-21 19:27:50,736 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 575 predicate places. [2024-06-21 19:27:50,736 INFO L495 AbstractCegarLoop]: Abstraction has has 605 places, 548 transitions, 6141 flow [2024-06-21 19:27:50,736 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) [2024-06-21 19:27:50,736 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:50,736 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:50,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2024-06-21 19:27:50,736 INFO L420 AbstractCegarLoop]: === Iteration 207 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:27:50,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:50,737 INFO L85 PathProgramCache]: Analyzing trace with hash -52718536, now seen corresponding path program 9 times [2024-06-21 19:27:50,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:50,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395835687] [2024-06-21 19:27:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:50,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:52,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:52,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:52,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395835687] [2024-06-21 19:27:52,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395835687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:52,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:52,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:27:52,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820111083] [2024-06-21 19:27:52,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:52,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:27:52,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:52,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:27:52,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:27:52,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:27:52,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 605 places, 548 transitions, 6141 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) [2024-06-21 19:27:52,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:52,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:27:52,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:53,910 INFO L124 PetriNetUnfolderBase]: 1456/2622 cut-off events. [2024-06-21 19:27:53,911 INFO L125 PetriNetUnfolderBase]: For 611167/611167 co-relation queries the response was YES. [2024-06-21 19:27:53,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17441 conditions, 2622 events. 1456/2622 cut-off events. For 611167/611167 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 16848 event pairs, 447 based on Foata normal form. 8/2628 useless extension candidates. Maximal degree in co-relation 17201. Up to 1926 conditions per place. [2024-06-21 19:27:53,952 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 442 selfloop transitions, 123 changer transitions 10/577 dead transitions. [2024-06-21 19:27:53,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 611 places, 577 transitions, 7833 flow [2024-06-21 19:27:53,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:27:53,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:27:53,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 157 transitions. [2024-06-21 19:27:53,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4220430107526882 [2024-06-21 19:27:53,953 INFO L175 Difference]: Start difference. First operand has 605 places, 548 transitions, 6141 flow. Second operand 12 states and 157 transitions. [2024-06-21 19:27:53,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 611 places, 577 transitions, 7833 flow [2024-06-21 19:27:56,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 577 transitions, 7797 flow, removed 4 selfloop flow, removed 12 redundant places. [2024-06-21 19:27:56,018 INFO L231 Difference]: Finished difference. Result has 600 places, 545 transitions, 6328 flow [2024-06-21 19:27:56,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6109, PETRI_DIFFERENCE_MINUEND_PLACES=588, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=548, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6328, PETRI_PLACES=600, PETRI_TRANSITIONS=545} [2024-06-21 19:27:56,019 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 570 predicate places. [2024-06-21 19:27:56,019 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 545 transitions, 6328 flow [2024-06-21 19:27:56,019 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) [2024-06-21 19:27:56,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:27:56,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:27:56,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206 [2024-06-21 19:27:56,020 INFO L420 AbstractCegarLoop]: === Iteration 208 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:27:56,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:27:56,020 INFO L85 PathProgramCache]: Analyzing trace with hash 1743165438, now seen corresponding path program 10 times [2024-06-21 19:27:56,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:27:56,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469027028] [2024-06-21 19:27:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:27:56,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:27:56,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:27:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:27:57,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:27:57,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469027028] [2024-06-21 19:27:57,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469027028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:27:57,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:27:57,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:27:57,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223222867] [2024-06-21 19:27:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:27:57,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:27:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:27:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:27:57,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:27:58,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:27:58,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 545 transitions, 6328 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) [2024-06-21 19:27:58,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:27:58,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:27:58,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:27:59,301 INFO L124 PetriNetUnfolderBase]: 1481/2673 cut-off events. [2024-06-21 19:27:59,301 INFO L125 PetriNetUnfolderBase]: For 770420/770420 co-relation queries the response was YES. [2024-06-21 19:27:59,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19745 conditions, 2673 events. 1481/2673 cut-off events. For 770420/770420 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 17182 event pairs, 458 based on Foata normal form. 8/2679 useless extension candidates. Maximal degree in co-relation 19506. Up to 2035 conditions per place. [2024-06-21 19:27:59,347 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 442 selfloop transitions, 125 changer transitions 7/576 dead transitions. [2024-06-21 19:27:59,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 576 transitions, 8040 flow [2024-06-21 19:27:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-21 19:27:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-21 19:27:59,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 164 transitions. [2024-06-21 19:27:59,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40694789081885857 [2024-06-21 19:27:59,349 INFO L175 Difference]: Start difference. First operand has 600 places, 545 transitions, 6328 flow. Second operand 13 states and 164 transitions. [2024-06-21 19:27:59,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 576 transitions, 8040 flow [2024-06-21 19:28:02,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 599 places, 576 transitions, 7876 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-21 19:28:02,750 INFO L231 Difference]: Finished difference. Result has 600 places, 545 transitions, 6423 flow [2024-06-21 19:28:02,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6170, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6423, PETRI_PLACES=600, PETRI_TRANSITIONS=545} [2024-06-21 19:28:02,751 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 570 predicate places. [2024-06-21 19:28:02,751 INFO L495 AbstractCegarLoop]: Abstraction has has 600 places, 545 transitions, 6423 flow [2024-06-21 19:28:02,751 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) [2024-06-21 19:28:02,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:02,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:02,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207 [2024-06-21 19:28:02,751 INFO L420 AbstractCegarLoop]: === Iteration 209 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:28:02,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:02,752 INFO L85 PathProgramCache]: Analyzing trace with hash -52598566, now seen corresponding path program 11 times [2024-06-21 19:28:02,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:02,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248963379] [2024-06-21 19:28:02,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:02,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:04,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:04,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248963379] [2024-06-21 19:28:04,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248963379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:04,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:04,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-21 19:28:04,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678676591] [2024-06-21 19:28:04,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:04,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-21 19:28:04,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:04,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-21 19:28:04,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-06-21 19:28:05,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:28:05,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 600 places, 545 transitions, 6423 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) [2024-06-21 19:28:05,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:05,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:28:05,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 19:28:06,269 INFO L124 PetriNetUnfolderBase]: 1450/2612 cut-off events. [2024-06-21 19:28:06,270 INFO L125 PetriNetUnfolderBase]: For 633047/633047 co-relation queries the response was YES. [2024-06-21 19:28:06,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17688 conditions, 2612 events. 1450/2612 cut-off events. For 633047/633047 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 16791 event pairs, 450 based on Foata normal form. 10/2620 useless extension candidates. Maximal degree in co-relation 17451. Up to 2050 conditions per place. [2024-06-21 19:28:06,333 INFO L140 encePairwiseOnDemand]: 17/31 looper letters, 437 selfloop transitions, 115 changer transitions 14/568 dead transitions. [2024-06-21 19:28:06,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 609 places, 568 transitions, 7659 flow [2024-06-21 19:28:06,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-21 19:28:06,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-21 19:28:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 150 transitions. [2024-06-21 19:28:06,335 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-06-21 19:28:06,335 INFO L175 Difference]: Start difference. First operand has 600 places, 545 transitions, 6423 flow. Second operand 12 states and 150 transitions. [2024-06-21 19:28:06,335 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 609 places, 568 transitions, 7659 flow [2024-06-21 19:28:09,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 598 places, 568 transitions, 7409 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-21 19:28:09,282 INFO L231 Difference]: Finished difference. Result has 599 places, 540 transitions, 6351 flow [2024-06-21 19:28:09,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=31, PETRI_DIFFERENCE_MINUEND_FLOW=6173, PETRI_DIFFERENCE_MINUEND_PLACES=587, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=6351, PETRI_PLACES=599, PETRI_TRANSITIONS=540} [2024-06-21 19:28:09,282 INFO L281 CegarLoopForPetriNet]: 30 programPoint places, 569 predicate places. [2024-06-21 19:28:09,283 INFO L495 AbstractCegarLoop]: Abstraction has has 599 places, 540 transitions, 6351 flow [2024-06-21 19:28:09,283 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) [2024-06-21 19:28:09,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 19:28:09,283 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 19:28:09,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208 [2024-06-21 19:28:09,283 INFO L420 AbstractCegarLoop]: === Iteration 210 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2024-06-21 19:28:09,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 19:28:09,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1747811718, now seen corresponding path program 12 times [2024-06-21 19:28:09,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 19:28:09,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758890011] [2024-06-21 19:28:09,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 19:28:09,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 19:28:09,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 19:28:12,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 19:28:12,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 19:28:12,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758890011] [2024-06-21 19:28:12,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758890011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 19:28:12,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 19:28:12,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-21 19:28:12,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198842055] [2024-06-21 19:28:12,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 19:28:12,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-21 19:28:12,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 19:28:12,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-21 19:28:12,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2024-06-21 19:28:13,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 31 [2024-06-21 19:28:13,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 599 places, 540 transitions, 6351 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) [2024-06-21 19:28:13,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 19:28:13,182 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 31 [2024-06-21 19:28:13,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15